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20:49 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Semantic assessment and monitoring of crowdsourced geographic information

Whilst opensource software allows for the transparent collection of crowdsourced geographic information, in order for this material to be of value it is crucial that it be trusted. A semantic assessment of a feature’s attributes against ontologies representative of features likely to reside in this location provides an indication of how likely it is that the information submitted actually represents what is on the ground. This trust rating can then be incorporated into provenance information to provide users of the dataset an indication of each feature’s likely accuracy. Further to this, querying of provenance information can identify the features with the highest/lowest trust rating at a point in time. This presentation uses crowdsourced data detailing the location of fruit trees as a case study to demonstrate these concepts. Submissions of such crowdsourced information – by way of, say, an OpenLayers frontend – allow for the collection of both coordinate and attribute data. The location data indicates the relevant ontologies – able to be developed in Protégé – that describe the fruit trees likely to be encountered. If the fruit name associate with a submitted feature is not found in this area (e.g. a coconut tree in Alaska) then, by way of this model, the feature is determined to be inaccurate and given a low trust rating. Note that the model does not deem the information wrong or erase it, simply unlikely to be correct and deemed to be of questionable trust. The process continues by comparing submitted attribute data with the information describing the type of fruit tree – such as height – that is contained in the relevant ontologies. After this assessment of how well the submitted feature “fits” with its location the assigned trust rating is added to the feature’s provenance information via a semantic provenance model (akin to the W3C’s OPM). Use of such semantic web technologies then allows for querying to identify lower quality (less trustworthy) features and the reasons for their uncertainty (whether it be an issue with collection – such as not enough attribute data being recorded; time since collection – given degradation of data quality over time, i.e. older features are likely less accurate than newer ones; or because of a major event that could physically alter/remove the actual element, like a storm or earthquake). The tendency for crowdsourced datasets to be continually updated and amended means they are effectively dynamic when compared to more traditional datasets that are generally fixed to a set period/point in time. This requires them to be easily updated; however, it is important that efforts are directed at identifying and strengthening the features which represent the weakest links in the dataset. This is achievable through the use of opensource software and methods detailed in this presentation.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
32:29 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Magical PostGIS in three brief movements

Everyone knows you can query a bounding box or even spatially join tables in PostGIS, but what about more advanced magic? This short symphony of PostGIS examples will look at using advanced features of PostGIS and PostgreSQL to accomplish surprising results: * Using full text search to build a spatially interactive web form. * Using raster functionality to look into the future. * Using standard PostgreSQL features to track and visualize versioning in data. PostGIS is a powerful tool on it's own, but combined with the features of PostgreSQL, it is almost magical.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
25:33 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Intelligent SDIs with MapMint 2.0

This conference aims at presenting the status of the MapMint open source project and its upcoming 2.0 version. The upgrade to newer versions of its core open source components will first be explained. The extensive use of OGC standards through ZOO-Project 1.5, GDAL 1.11 and MapServer 7 is indeed making MapMint an even more stable and efficient foundation to build an open source and standard-compliant spatial data infrastructure. The new metadata related functionalities being developed in interaction with PyCSW and CKAN will also be presented along with the assets of the CSW standard support. The new MapMint responsive user interfaces based on OpenLayers 3 and Bootstrap will also be presented. Both code and documentation improvements will also be detailed. The newly added functionalities in MapMint 2.0 will finally be explained from the developer and user point of views, based on case studies and live examples.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
26:13 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Advanced Security with GeoServer and GeoFence

The presentation will provide an introduction to GeoServer own authentication and authorization subsystems. We’ll cover the supported authentication protocols, such as from basic/digest authentication and CAS support, check through the various identity providers, such as local config files, database tables and LDAP servers, and how it’s possible to combine the various bits in a single comprehensive authentication tool, as well as providing examples of custom authentication plugins for GeoServer, integrating it in a home grown security architecture. We’ll then move on to authorization, describing the GeoServer pluggable authorization mechanism and comparing it with proxy based solution, and check the built in service and data security system, reviewing its benefits and limitations. Finally we’ll explore the advanced authentication provider, GeoFence, explore the levels on integration with GeoSErver, from the simple and seamless direct integration to the more sophisticated external setup, and see how it can provide GeoServer with complex authorization rules over data and OGC services, taking into account the current user, OGC request and requested layers to enforce spatial filters and alphanumeric filters, attribute selection as well as cropping raster data to areas of interest.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
32:27 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Towards GeoExt 3 – Supporting both OpenLayers 3 and ExtJS 6

GeoExt (http://geoext.github.io/geoext2/) is Open Source and enables building desktop-like GIS applications through the web. It is a JavaScript framework that combines the GIS functionality of OpenLayers with the user interface savvy, rich data-package and architectural concepts of the ExtJS library provided by Sencha. Version 2.1 of GeoExt (currently in alpha-status) is the successor to the GeoExt 1.x-series and brought support for ExtJS 5 and is built atop the following installments of its base libraries: OpenLayers 2.13.1 and ExtJS 5.1.0 (or ExtJS 4.2.1 at your choice). The next version of GeoExt (v3.0.0?) will support OpenLayers 3 and the new and shiny ExtJS 6 (not finally released at the time of this writing). The talk will focus on the following aspects: * Introduction into GeoExt * New features in OpenLayers 3 and ExtJS 6 and how they can be used in GeoExt * The road towards GeoExt 3 * Results of the planned Code Sprint in June (see https://github.com/geoext/geoext3/wiki/GeoExt-3-Codesprint) * Remaining tasks and outlook The new features of OpenLayers (e.g. WebGL-support, rotated views, smaller build sizes, etc.) and Ext JS 6 (Unified code base for mobile and desktop while providing all functionality of ExtJS 5) and the description of the current state of this next major release will be highlighted in the talk. Online version of the presentation: http://marcjansen.github.io/foss4g-2015/Towards-GeoExt-3-Supporting-both-OpenLayers-3-and-ExtJS-6.html#/
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
21:21 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

High-precision open lidar data enable new possibilities for spatial analysis in the canton of Zurich/Switzerland

The department of geoinformation of the canton of Zurich/Switzerland has carried out a high-resolution laser scanning (LIDAR) last year over the entire canton of Zurich. The extensive data (8 pts / m2) have now been evaluated, and a digital surface (DSM) and terrain model (DTM) created (dot grid of 50 cm and horizonal and vertical accuracies of 20 cm, resp. 10 cm. This is the first time high-resolution elevation data is widely available for the entire canton of Zurich. In the past, lidar data have been collected only for small-scale projects. As a novelty, the department has decided to provide the lidar data and its derived products, i.e. DTM and DSM, as open data to the public. With this decision new standards are set not only in terms of accuracy and scope, but also in the usage as open government data. The lidar data can provide valuable support for example in the areas of infrastructure, urban planning, regional planning, natural hazard assessment, forestry, environment, energy, line survey, solar potential analysis, surveying, archeology, agriculture, water or noise. Due to the planned repetition cycle of four years even time series and monitoring projects are possible. Therefore it is not surprising, that since the opening as open data, many interesting applications using this data have been created. The presentation will show the high-resolution data and its possible usage for terrain-visualizations. A selection of the most appealing visualizations will be demonstrated, e.g. an Oculus Rift version enabling the user to navigate through virtual reality. It will further give an insight in the challenge of opening up the LIDAR?data for the public, i.e. setting up an open-data strategy in the cantonal administration of Zurich.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
21:15 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Using the latest ISO standard for geographic information (ISO19115-1:2014)

Release in April 2014, this talk will introduce the major changes of the new standard for metadata on geographic information and what are the benefits for the data managers. It will be illustrated by its implementation in the latest GeoNetwork 3 version and with examples on how the Wallonia Region in Belgium migrated to it.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
14:05 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

triple-A for the environment: make IT simply better

triple-A for the environment: make IT simply better With the new Dutch Environment Act, the legal framework for development and maintenance of the physical environment becomes more understandable and manageable for citizens, businesses and governments. A simpler and more coherent environmental law contributes to work actively and efficiently on a dynamic and sustainable environment. This entire exercise of harmonization, reduction and integration is headed by the motto “Simply better”. In addition to the merging several dozen laws and regulations in one Environment Act (http://www.omgevingswet.nl), also the central IT office where citizens can apply for a environmental permit is further improved. This should make it easier to obtain a permit for example for a construction or business activity. The information presented in this central IT office must fulfill the triple-A requirements, i.e. Accessible, Applicable and Abiding. On the basis of this is a national system of open (geo)data registers of which the data acquisition and management is mandated to (semi-)government organizations. On each area of environmental law, a domain expert is appointed; stakeholders of each domain are metaphorically organized in an ”information house”, and all houses are situated metaphorically along “the avenue of the environment”. Goal of the improved central IT office is to provide a clear understanding of the relevant legislation and to allow each actor in the process to work with the same data and definitions. Therefore, we developed a prototype which presents a concept of linking data, definitions and regulations stored in one central register using an online mapping service as user interface. Using Linked Data as strategy with persistent URIs, we are able to link the concepts in this register to an end-user prototype application. We implemented an prototype for the question: “Do I need an environmental permit for… applying a change in business activity?“. An air quality impact assessment is computed based on user input an visualized in a map interface showing the effects of an increase of nitrogen emission on the nearby nature reserves after extending a greenhouse farming. We used the AERIUS calculation tool (http://www.aerius.nl/) of the National Institute for Public Health and the Environment and presented the returned geodata as GeoJSON in the Leaflet Map API (http://www.leaflet.org). With this prototype, we provide a concept which facilitates the clear understanding of the requirements for an environmental permit by making IT simply better.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
23:44 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

CartoDB Basemaps: a tale of data, tiles, and dark matter sandwiches

CartoDB is an open souce tool and SaaS platform that allows users to make beautiful maps quickly and easily from their own data. To complement our users needs, we launched last year our free-to-use open source OSM based basemaps Positron and Dark Matter (https://github.com/CartoDB/CartoDB-basemaps), designed in collaboration with Stamen to complement data visualization. While architecturing them, we had several compromises in mind: they had to be powered by our existing infrastructure (powered by Mapnik and PostGIS at its core), they had to be scalable, cacheable but frequently updated, customizable, match with data overlays, and, last but not least, they had to be beautiful. This talk is the tale of the development process and tools we used, how we implemented and deployed them and the technology challenges that arose during the process of adapting a dynamic mapping infrastructure as CartoDB to the data scale of OSM, including styling, caching, and scalability, and how (we think) we achieved most of those. I will also talk about the future improvements that we are exploring about mixing the combination of basemap rendering with data from other sources, and how you can replicate and tweak those maps on your own infrastructure.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
21:13 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Geodata for Everyone - Model-driven development and an example of INSPIRE WFS service

In denmark the public authorities register various core information about individuals, businesses, real properties, buildings, addresses, ect.. This information is re-used throughout the public sector. It is a challenge for public authorities to re-use data from different providers to perform their tasks properly and efficiently across units, administrations and sectors. Therefore all the authoritative basic data should be defined and standardized according to the same methods. Danish Geodata agency as Denmark's central public source of geographic data has established a set of guidelines for future modelling of spatial data for distributing them as open geographic data. Based on the guidelines a model-driven process has also been established. It starts from the data modelling in UML to the end where data are distributed through WFS services and download services. One INSPIRE WFS service will be used as a concrete example.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
31:40 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Mapping in GeoServer with SLD and CSS

Various software can style maps and generate a proper SLD document for OGC compliant WMS like GeoServer to use. However, in most occasions, the styling allowed by the graphical tools is pretty limited and not good enough to achieve good looking, readable and efficient cartographic output. For those that like to write their own styles CSS also represents a nice alternatives thanks to its compact-ness and expressiveness. Several topics will be covered, providing examples in both SLD and CSS for each, including: mastering multi-scale styling, using GeoServer extensions to build common hatch patterns, line styling beyond the basics, such as cased lines, controlling symbols along a line and the way they repeat, leveraging TTF symbol fonts and SVGs to generate good looking point thematic maps, using the full power of GeoServer label lay-outing tools to build pleasant, informative maps on both point, polygon and line layers, including adding road plates around labels, leverage the labelling subsystem conflict resolution engine to avoid overlaps in stand alone point symbology, blending charts into a map, dynamically transform data during rendering to get more explicative maps without the need to pre-process a large amount of views. The presentation aims to provide the attendees with enough information to master SLD/CSS documents and most of GeoServer extensions to generate appealing, informative, readable maps that can be quickly rendered on screen.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
29:02 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Improving public health delivery in northern Nigeria using open source technologies

  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
16:51 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

A framework for assessing location-based personalized exposure risk of infectious disease transmission

Human mobility is an important risk factor affecting disease transmission. Therefore, understanding detailed spatial behaviors and interactions among individuals is a fundamental issue. Past studies using high-resolution human contacts data from smart phones with GPS logs have captured spatial-temporal heterogeneity and daily contact patterns among individuals. However, measuring personalized exposed risk of infectious disease transmission is still under development. The purpose of the study is to establish a location-based framework for assessing personalized exposed risk of infectious disease transmission. The framework consists of three components: the first is client-side smart phone-based risk assessment module. We developed Android application for collecting real-time location data and displaying the personalized exposed risk score. The second component is the server-side epidemic simulation model. The simulation model calculated the personalized exposed risk score based on real-time GPS logs and individual mobility data from the client-side Android application. The last component is the disease alarm device for triggering the service-side epidemic simulation model. We installed infrared sensors in people-gathering areas as the alarm device to monitor human body temperature for detecting fever syndrome. We used NTU main campus as a pilot study to demonstrate the feasibility of the framework. We analyzed the records of students’ taking course and modeled the spatial interaction relationships among classroom buildings due to students’ mobility around the campus. Someone who got a fever is detected by the sensor and the server-side epidemic simulation is triggered. Each student who installed the client-side risk assessment module in his/her smart phone receives the real-time personalized exposed risk score when an epidemic outbreak on the NTU campus. The study proposed a location-based framework for measuring real-time personalized exposed risk. Each student at the campus could understand the spatial diffusion of disease transmission and make better spatial decisions based on personalized exposed risk scores.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
28:12 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

A spatial view in the culture heritage domain

Culture heritage institutions are hosting digital historic map collection and the collections more and more allow spatial-temporal searching and georeferencing of its maps. At the Saxon State and University Library Dresden (SLUB) this lead to the development of the Virtual Map Forum 2.0, which is a spatial data infrastructure (SDI) for searching, visualization and georeferencing plane survey sheets. This SDI mainly relies on OpenLayers 3, Mapserver, GeoNetwork and GDAL. Beside that, tools for automatic georeferencing based on image recognition software have been developed and compared with the use of crowdsourcing tools for georeferencing. A further topic, on which culture heritage institutions are focusing is enrichment, transformation and merging of existing heterogeneous metadata sets. The goal is to allow better searching and utilization approaches for digital and analog objects. In the SLUB this lead to the development of the open source ETL-tool d:swarm, which supports the transformation and enrichment of metadata records. This opens possibilities for adding spatial identifier to large amounts of library objects, like pictures, newspaper articles or books and through this allows for a greater consideration of the spatial dimension in discovery systems. Another big topic is long term preservation, which becomes even more important with the growing number of digital native publications and datasets. Libraries and archives as experts of long term preservation and spatial data infrastructure provider, which are confronted with tasks and questions regarding the preservation of content. They therefor can benefit from an exchange of knowledge and work between each other. The presentation will give an insight into the world of culture heritage institutions. It will present topics, where FOSS4G and libraries can benefit from each other. Therefore it discusses different issues from within the SLUB where FOSS4G is used or could be used and spatial issues are affected. The main topics are spatial-temporal searching and visualization, georeferencing, metadata enrichment and long-term preservation.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
21:10 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

GIS-modelling of long-term consequences after a nuclear accident.

In order to evaluate consequences of deposited radioactive cesium (and other radioactive substances) in natural systems a GIS based model called Stratos has been developed. This model incorporates information regarding deposition, transfer to vegetation and animals, intervention levels and geographical distribution of animals. The presentation will use a case study which describes the possible environmental consequences for Norway due to a hypothetical accident at the Sellafield complex in the UK. The scenario considered involves an explosion and fire at the B215 facility resulting in a 1 % release of the total HAL 1 inventory of radioactive waste with a subsequent air transport and deposition in Norway. Air transport modeling is based on real meteorological data from October 2008 with wind direction towards Norway and heavy precipitation. This weather is considered to be quite representative as typical seasonal weather. Based on this weather scenario, the estimated fallout in Norway will be ~17 PBq of cesium-137 which is 7 times higher than fallout after the Chernobyl accident. The modeled radioactive contamination is linked with data on transfer to the food chain and statistics on production and hunting to assess the consequences for foodstuffs. The investigation has been limited to the terrestrial environment, focusing on wild berries, fungi, and animals grazing unimproved pastures (i.e. various types of game, reindeer, sheep and goats). The results of a model-run are maps for the chosen products, with categorized colors - giving the degree of consequences. A linked text file gives relevant numeric values for each color. The Stratos model is written in python which calls GRASS-functions and uses as gui for model setup. The model has been used for two reports at the Norwegian Radiation Protection Authority, and is currently being used and developed further in the "Centre for Environmental Radioactivity" (CERAD), cerad.nmbu.no.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
21:14 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Open Source for Handling IndoorGML

In order to respond to increasing demand for indoor spatial information, an OGC standard called IndoorGML, has been recently published. It is an application schema of GML and based on the cellular space model, which represents an indoor space as a set of cells with their geometric, topological, and semantic attributes. Since we are at a beginning stage, very few tools supporting IndoorGML have been developed. In our talk, we will present an open source tool that we have been developing to provide a translating function between IndoorGML and other data formats. For example, it offers a Java package with a set of classes for indoorGML, called JavaIndoorGML. Once IndoorGML documents are mapped to Java instances of classes in JavaIndorGML, we are able to handle indoor spatial information with ease.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
21:27 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Decision-making system for grants for maintaning services in rural areas

Sweden is a sparsely populated country. Normally market forces would regulate the number and location of both public and commercial services as schools, medical care, grocery stores and pharmacies. In sparsely populated areas these forces does not work. The Swedish government has realized this and gives economical support to some services in order to maintain or in some cases expand the service level. The aim with this grants is to provide conditions for living, working and contribute to economic growth in these in remote areas. To be as effective as possible a decision making system has been developed to support the administrators of the grant. The system allows the administrators to monitor the current situation, update changes in the service structure and simulate fictive scenarios. The system is built on an open source platform and is available through the internet to authorized administrators on the regional level of the Swedish administration. As platform for the system the following open source projects and formats are used GeoExt, Ext JS, Openlayers, Mapfish, Pylons, GEOAlchemy, Mapserver, PostGIS, GeoJSON.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
24:12 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

OpenDroneMap, Next Steps: Toward optimization and better 3D modeling

OpenDroneMap is an open source toolkit for processing drone imagery. From raw imagery input, it outputs a georeferenced pointcloud, mesh, and orthophoto. This is a powerful toolkit to change unreferenced arbitrary images into geographic data. Next steps in the project are needed to improve optimization of underlying algorithms, steps to better create meshes / textured meshes from the resultant pointclouds by explicitly modeling surfaces, and to make better output data from lower quality inputs. Come and see where the project is at, how the state of the art is advancing, and how you can use it and contribute.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
22:59 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

ZOO-Project 1.5.0: News about the Open WPS Platform

ZOO-Project is an Open Source Implementation of the OGC Web Processing Service (WPS) available under a MIT/X-11 style license and currently in incubation at OSGeo. ZOO-Project provides a WPS compliant developer-friendly framework to easily create and chain WPS Web services.This talk give a brief overview of the platform and summarize new capabilities and enhancement available in the 1.5.0 release. A brief introduction to WPS and a summary of the Open Source project history with its direct link with FOSS4G will be presented. An overview of the ZOO-Project will then serve to introduce new functionalities and concepts available in the 1.5.0 release and highlight their interests for applications developers and users. Evolutions and enhancements of the ZOO-Project WPS server (ZOO-Kernel) will first be detailed especially regarding compliancy (WPS 1.0.0 and 2.0), performance and scalability. The ZOO-Project optional support for Orfeo Toolbox and SAGA GIS will then be introduced, with details on the numerous new WPS Services (ZOO-Services) they provide. Use and connexion with other reliable open source libraries such as GDAL, GEOS, MapServer, GRASS GIS, CGAL will also be reviewed. Examples of concrete applications will finally be shown in order to illustrate how ZOO-Project components (ZOO-Kernel, ZOO-Services, ZOO-API and ZOO-Client) can be used together as a platform to build standard compliant advanced geospatial applications. Along with the new 1.5 release, this talk will also present how ZOO-Project is being developed, extended and maintained in the context of the EU funded PublicaMundi research project.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
23:07 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

The OpenStreetMap Revolution

OpenStreetMap is at the center of a data and software revolution that has completely changed what we expect from maps and how we interact with them. The project has defined open map collaboration, it is a cradle of open software innovation, is used by businesses and governments, enables startups against industry giants and has opened the power of GIS to the underprivileged and poor. OpenStreetMap is only one of very few commercially viable global geospatial datasets. Ten years into the project, it is clear that OpenStreetMap is not an impossible quest nor a fluke of history, but it is here to stay and grow. An amazing and growing community, this year, OpenStreetMap crossed the two million users mark. Every month, 30,000 users log into the map and improve it. And OpenStreetMap stands to attract even more attention: Data of large proprietary vendors continues to be effectively not available to a huge part of the market due to rigid licensing; rumors around Nokia's HERE changing owners are at an all time high. This talk sweeps through OpenStreetMap's history and gives a detailed look at the state of the project in statistics and visualizations, including recent map developments in Asia. It reviews OpenStreetMap's strengths and weaknesses and makes predictions for the future of OpenStreetMap. We'll finish up with opportunities and needs for the project to grow as an open data community and a suite of open source software tools.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
22:44 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Building OpenLayers Applications with QGIS

OpenLayers 3 is a powerful mapping library that can be used to create interactive mapping applications. Although it has a simple, intuitive and well-documented API, it requires knowledge of JavaScript to use, and no tools exist to leverage its functionality for more general GIS users. This presentation introduces an open-source QGIS plugin that creates web applications based on OL3, without the need of writing code manually. Elements of the web app are defined using a simple GUI, and QGIS GUI elements are used as well to define its characteristics (for instance, for defining the styling of layers or the extent of the view). The plugin can create different types of web apps, from simple maps used to browse data layers, to rich ones with GIS-like functionality, as well as others such as narrative maps. Apart from being an interface for writing OL3 code in a graphical way, it automates data deployment, and can import data into a PostGIS database or upload layers to a GeoServer instance. Altogether, these capabilities, along with QGIS data management functionality, allow to create a web app from QGIS in a very short time, as well as modifying or improving it later.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
24:17 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

MapWindow Plug-in of GRM Model Using Open Source Software

This presentation shows the processes and methods for developing distributed rainfall-runoff modeling system using open source softwares. The objective of this study is to develop a MapWindow plug-in for running GRM (Grid based Rainfall-runoff Model) model (MW-GRM) in open source GIS software environment. MW-GRM consists of the GRM model, physically based rainfall-runoff model developed by Korea Institute of Civil Engineering and Building Technology (KICT), for runoff simulation, pre and post processing tools for temporal and spatial data processing, and auto-calibration process. Each component is integrated in the modeling software (MW-GRM), and can be run by selecting the MW-GRM menus. In developing MW-GRM, free software and open source softwares are used. GRM model was developed by using Visual Basic .NET included in Microsoft Visual Studio 2013 express, pre and post processing tools were developed by using MapWindow (Daniel, 2006) and GDAL (Geospatial Data Abstraction Library), and PEST (John, 2010) model was used in the auto-calibration process. The modeling system (MW-GRM) was developed as MapWindow plug-in. System environment was Window 7 64bit. MapWindow GIS ActiveX control and libraries were used to manipulate geographic data and set up GRM input parameters. ESRI ASCII and GeoTIFF raster data formats, supported by MapWindow and GDAL, were applied and shape file (ESRI, 1997) was used in vector data processing. GDAL is a library for translating vector and raster geospatial data. In this study, GDAL execution files were used to develop pre and post processing tools. The tools include data format conversion, spatial interpolation, clipping, and resampling functions for one or more raster layers. PEST is a model-independent parameter estimation software. Parameter estimation and uncertainty analysis can be carried out using PEST for model calibration and sensitive analysis. PEST is developed as an open source software, and single and parallel execution files are provided. This study developed GRM uncertainty analysis GUI as an interface system of GRM and PEST. GRM model had been a DLL type library including APIs to support developing another application. But PEST needs a model execution file, which can run in console execution window without user intervention. This study developed GRM execution file (GRMMP.exe) running in console window. It can simulate runoff using GRM project file, and no user intervention is allowed after the simulation has started. GRM uncertainty analysis GUI makes PEST input files (pcf, pif, ptf, rmf, etc.) by setting GRM parameters, observed data, PEST parameters, and selecting single or parallel PEST and PEST run automatically using GRMMP.exe file. In this study, all the functions necessary to develop GRM modeling system and pre and post processing tools could be implemented by using open source software. And MapWindow plug-in of GRM model can simulate runoff in open GIS environment including automatic model calibration using PEST. The study results can contribute to the wide spread of physically based rainfall-runoff modeling. And this study can present useful information in developing distributed runoff modeling system using open source software.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
19:50 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

WPS Benchmarking Session

The yearly Web Processing Service (WPS) benchmark. Variuos WPS implementations will be tested regarding their capabilities, compliancy to the standard and performance. Traditionally, each participating project designates individuals from their community to participate in this talk to introduce their project and summarize its key features. The focus this year will be on compliancy and interoperability. We will present the test set-up, participating WPS projects and the results of the benchmark.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
20:33 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Saving Rapid Urbanizing Cities using the FOSS4G Based Spatial Analysis for Urban Development

Early stages of urban developments such as housing construction, new town development and urban regeneration are performed through the spatial analysis using the topographic map, cadastral map, zoning map and other various kind of thematic maps for the proposed site analysis, feasibility analysis and evaluation of urban development alternatives. For these analyses, urban developers traditionally have used commercial software like ArcGIS to analyze these kinds of projects. And giant Korean public urban developer like Korea land and Housing Corporation (LH) has support these projects based on the in-house enterprise GIS system. But developing countries facing rapid urbanization near the peripheral areas of metropolitan region cannot handle such problems only using the commercial software. They need knowledge and experience about the urban development rather than complicated software based analysis techniques or large investments on the enterprise GIS system. In this sense, FOSS4G (Free Open Source Software for Geospatial) are very useful tools in that they are easy to learn, use and also relatively cheap to maintain. LH has accumulated a lot of urban development cases and wants to store this knowledge to FOSS4G based spatial analysis as a rule base. By doing so, it can manage the fast growing cities sustainable. In this presentation, we will show some conceived urban development project faced by the rapid urbanizing cities and suggest FOSS4G based spatial analysis method using the FOSS4G like QGIS plug-in.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
16:10 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

GIS Policy Map for Local Government in Korea: Story of Dobong-gu, Seoul

Local governments in Korea are trying to solve urban problems using GIS policy map. Through FOSS4G Seoul, I want to introduce example of Dobong-gu, Seoul. Topic 1. Spatial Analysis of Practical Requirements of Parking Lot The residents who live in the old residential zone in Dobong-gu are suffering from shortage of parking spaces every morning and night. Most administrators are using an indicator named ‘a ratio of cars to parking spaces’ to judge seriousness of the problem with parking. But the indicator cannot reflect reality. We measured practical requirements of parking lot spatially, using micro block data and car registration data with addresses. We tried to look at things from the resident’s perspective, not from administrator or provider. Now, Dobong-gu push ahead with sharing parking lot program with houses which have spare parking spaces. Topic 2. Civic Participation Model for Solving Children’s School Walkway Safety Problems. Office of Policy Development of Dobong-gu did a survey with a thousand residents about safety issue, and many of them answered that they feel fear walking down the alley. Although the Office got the policy implication from survey, they couldn’t convince the definition of ‘alley’ and accurate location where the residents feel fear. Office and we redesigned survey paper cooperatively. The improvement point was ‘Map-based Survey’. Elementary school students and their parents participated and they lined school walkway and alleyways where they felt fear on paper map. We migrated all the lines on papers to shape files using QGIS, then we got a very satisfactory outcome. Office of Policy Development added LED lights to the dark street nearby elementary school, Elementary school teachers decided the walkway guidance spot by referring to students often jaywalk.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
24:37 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Gis Server with Golang.

GIS Server architecture with Golang. Find the better way of Golang GIS Server.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
22:50 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Push it through the wire! Push it more, if it's wireless!

Today's web browsers, their rendering engines and JavaScript interpreters are able to display relatively big amounts of vector data. Moving from DOM rendering (as it was implemented with help of SVG in for examples OpenLayers 2) to Canvas (and further to WebGL -- as we are now having in OpenLayers 3 or Leaflet) enables us to display thousands of complex vector features, with complicated on-client vector data styling. With this possibility, we are facing now new types problems: how to send such amount of data through limited internet connection? If we have closer look at the problem, we can see clearly, that old database paradigm has raised one more time: we can not have all three attributes of data in one pot, but only 2 of them: speed of the delivered data or amount of delivered data or their topicality. If we take this limits into account and decide to deal with big amounts of data in fast way, topicality must be sacrificed. In the talk, we will demonstrate some possible solutions for this problem, using tiled vectors, generalization, aggregation of vector data. Also advantages, disadvantages of various new and popular vector formats, such as GeoJSON, TopoJSON or MapBox will be discussed. Geometric data do not have be rendered all the time in all scales and over whole area of interest, but only necessary portion of them. If displayed in smaller scales, aggregation and generalisation can take place on the server side. That implies, that using vector caching mechanism could be considered as well. But if we need direct interaction of the server input with cached vector data, mechanism for this must be defined as well. Also attribute data have to be transfered separately, if all the optimisation was put in the vector geometries. Also possible steps between cached data and real-time data will be discussed.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
24:22 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Jsonix: Talking to OGC Web Services in JSON

Can you talk to OGC Web Services in JSON instead of XML? You can - with Jsonix, a powerful JavaScript tool for XML - JSON conversion. JSON has probably already replaced XML as a "lingua franca". JSON is much lighter and easier to use than XML, especially in JavaScript-based web apps. In the context of GIS, web mapping is dominated by JavaScript libraries like OpenLayers and Leaflet, which speak JSON natively. But what about the standards? Open Geospatial Consortium defines more than 50 specifications with more than 100 individual versions. Technically almost all of them are XML-based and defined by XML schemas. These are de jure and de facto standards, widely used and well supported. So you still need XML processing in JS web mapping apps. Processing XML is no rocket science, but it's seldom a pleasure to implement. The OL3 KML parser is about 2.5KLoc of dense XML parsing. Even a very simple WMS GetCapabilities format is almost 1 KLOC. From this code around 90% is pure XML parsing and only 10% is the processing of the payload. Would not it be nice if we could talk to the OGC Web Services directly in JSON? So that the developers could focus on the 10%, the payload processing, and cut off the 90% (XML handling) of the effort. Jsonix is an open source library for XML - JS conversion which makes it just possible. With Jsonix you can take an XML Schema and generate XML - JS mappings. These mappings allow you to parse XML in the original schema and get your data in pretty JSON. It also works in the opposite direction: you can serialize JSON in XML, which would correspond to the original XML Schema. What makes Jsonix unique is that it is type and structure-safe. On the JSON side, you will get types and structures exactly as they are defined in the original XML Schema. For instance, xs:decimal is converted into a number in number in JSON, repeatable elements are represented by arrays etc. You just need the corresponding mapping. You can generate Jsonix mappings on your own or use one of the pre-generated mappings. The (unofficial) OGC Schemas Project compiles and provides mappings for many of the popular OGC schemas (OWS, WMS, WFS, CSW, SLD and many more). This presentation gives an overview of Jsonix demonstrates its usage by a number of examples.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
16:07 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Dynamic analysis, reporting and visualization of metadata catalogue

More and more geospatial resources (datasets, services, maps, ...) are described in metadata catalogs. Now, users need to be able to get an overview of the resources available (eg. data quality, dissemination formats) for evaluating their data policies. This could be achieve with tools for analyzing and reporting on large sets of information and dynamically compute reports and build dashboards. This presentation will show how to collect information from CSW catalogs, compute reports and indicators and build and publish online dashboards using Solr and banana opensource projects. This will be illustrated by the INSPIRE Directive monitoring in Europe and the MedSea project.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
22:49 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Temporal Maps leading to new views in Spatial Analysis

Cloud-based mapping technologies are changing the way that the world interacts with GIS. Technologies that allow for aggregate querying of data that is both geospatial and temporal presents unique challenges and fruitful lines of inquiry. At CartoDB, we are pushing ahead with new ways of looking at spatio-temporal data visualization--which we have named Torque--, with intriguing results for both scientists and journalists. In this session, we will present use cases that offer unique ways of looking at data. We will also present challenges that lie ahead with our unique technology. My background in mathematical physics studying timeseries analysis has led to interesting insights and crossovers with the developers/hackers that originated the underlying technology. I hope to present the many lessons we've learned from Torque.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
19:55 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

State of GeoServer

State of GeoServer reviewing the new and noteworthy features introduced in the past year. The project has an aggressive six month release cycle with GeoServer 2.7 and 2.8 being released this year. These releases bring together exciting new features. A lot of work has been done on processing services with clustering, security and processing control. The rendering engine continues to improve with the addition of color blending opening up a range of creative possibilities. The CSS extension (used to easily generate OGC standard styles) has been cleaned up with a rewrite. This talk will highlighted updates on data import, application schema use, data transforms and the latest from the developer list. Attend this talk for a cheerful update on what is happening with this popular OSGeo project. Whether you are an expert user, a developer, or simply curious what these projects can do for you, this talk is for you.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
26:17 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

PostGIS Feature Frenzy

What can you do with this PostGIS thing? This talk covers some basic and not��so��basic ways to use PostGIS/PostgreSQL to process spatial data, to build infrastructures, and to do crazy things with data. PostGIS has over 300 functions, which in turn can be used with the many features of the underlying PostgreSQL database. This talk covers some basic and not��so��basic ways to use PostGIS/PostgreSQL to process spatial data, to build infrastructures, and to do crazy things with data. Consider the possibilities: raster, topology, linear referencing, history tracking, web services, overlays, unions, joins, constraints, replication, json, xml, and more!
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
26:46 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

CourtVisionPH: A System for the Extraction of Field Goal Attempt Locations and Spatial Analysis of Shooting Using Broadcast Basketball Videos

The presentation is about the development and application of CourtVisionPH. CourtVisionPH is a system developed for the extraction, storage, and analysis of basketball-related spatial information. It focuses on the extraction of field goal attempt (FGA) locations from broadcast basketball videos and the spatial analysis of shooting by means of statistics and maps/visualizations. The system was developed using the Python Programming Language. It features a database for storing spatial and non-spatial information and a Graphical User Interface (GUI) to help the user and the system interact. The modules used in the development include Tkinter for the GUI, SQLite for the database, Numpy for the computations, Pillow for image processing, and OpenCV for video rendering. The system has three independent but interconnected functionalities each with its own specific task: (1) Data Management which handles database connections, (2) Spatial Data Extraction for user-assisted extraction of FGA locations from videos using 2D-projective coordinate transformation and validation of transformed FGA locations sing RMSE and back-transformation, and (3) Spatial Analysis that computes statistics, generates maps/visualizations, and query-based analysis. After the development of the system, it was applied on UP Fighting Maroons and the DLSU Green Archers during the 2nd Round of University Athletics Association of the Philippines (UAAP) Season 76 (2013-2014). Videos publicly available online through youtube.com were used for extracting field goal attempt locations. Shots taken too far from the basket (half-court heaves, etc.) or those with bad RMSE or back-substitution results were excluded from the extraction. The extracted FGA locations were then validated using box-scores. Afterwhich, the system was used to analyze and compare the two teams and their players using statistics and visualizations and show that spatial analysis provides more information and allows for better characterization and appreciation of shooting than conventional, non-spatial techniques.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
29:12 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

Protecting the Planet with Postgis: How we are calculating complex protected area coverage statistics for all countries in the world.

ProtectedPlanet.net is the online interface for the World Database on Protected Areas (WDPA), a joint project of IUCN and UNEP, and the most comprehensive global database on terrestrial and marine protected areas. The WDPA is released every month and consists of a point and polygon dataset of over 210 000 entries. Over 91% of this data is in polygon format and the remaining 8% are points that can have an area as attribute. Displaying protected area coverage statistics is one of the main features of this website. It is very important for the users to know what percentage of the territory is covered by protected areas in a given country, region or the entire planet. Previously, these statistics were calculated manually and every year a team spends several days calculating them for a report using ESRI Software. We had a great challenge this time: Can we automatically calculate the statistics every month for all the protected areas and countries in the entire planet? In this case time matters: if we want to calculate statistics every month, it can't take 2 or 3 days of processing. To work through this, we chose a full open source solution with PostGIS to do all the back end tasks that we need to calculate statistics. We were able to limit all this to 6 hours and we can now run automatically every month keeping coverage statistics up to date.
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
26:49 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

PDAL: the Pointcloud Data Abstraction Library

An introduction to the PDAL pointcloud library, how to accomplish basic things, push data to plas,io, a webgl rendered and an introduction to GreyHound, the PDAL API. PDAL, GreyHound provide all the basic tools for pointcloud data translation and manipulation and hooks for various other projects to use the PDAL read/write engine (eg, PCL, Points2Grid)
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
23:48 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2015

New QGIS functions for power users

QGIS has seen a large amount of new functions and improvements during the last few years. And there is still more to come. This presentation shows the most recent changes and new functionalities in the codebase after version 2.8, both from a users and from a technical point of view: Curved geometries have long been a missed feature in FOSSGIS Desktop solutions, with such geometries usually ending up being segmented on import. A rewrite of the QGIS Geometry core now allows for native support of a number of curved geometry types, such as CircularString, CompoundCurve, CurvePolygon, etc., in addition to the traditionally supported Point, Line and Polygon geometries. As part of the redesign, proper support for M and Z coordinate values was also implemented for all supported types. Geometry errors can easily sneak into large datasets, either because of inexact data acquistion, but also due to gradual loss of precision when importing, exporting and converting the datasets to different formats. Manually detecting and fixing such issues can be very time consuming. To assist users confronted with such problems, the 'Geometry checker' has been developed. It provides the functionality to test a dataset for geometry and topology issues (such as duplicate nodes, overlaps, gaps, etc), presenting a list of detected faults. For each error type, the plugin offers one more more methods to automatically fix the issue. A third new function in the geometry domain is the snapper plugin. It allows to automatically align the boundaries of a layer to a background layer (e.g. align the parcel boundaries with a road background layer).
  • Published: 2015
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
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Version

AV-Portal 3.7.0 (943df4b4639bec127ddc6b93adb0c7d8d995f77c)