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20:49 FOSS4G, OSGeo Englisch 2016

Development of a new framework for Distributed Processing of Big Geospatial Data

The Geospatial world is still facing the lack of well-established distributed processing solutions tailored to the amount and heterogeneity of geodata, especially when fast data processing is a must. However, most current distributed computing frameworks have important limitations regarding both data distribution and data partitioning methods. Hence, this paper presents a prototype for tiling, stitching and processing of big geospatial data. The system is based on the IQLib concept developed in the frame of the IQmulus EU FP7 research and development project. The data distribution framework has no limitations on programming language environment and can execute scripts (and workflows) written in different development frameworks (e.g. Python, R or C#). It is capable of processing raster, vector and point cloud data. Our intention is to provide a solution to perform a wide range of geospatial processing capabilities in a distributed environment with no restrictions on data storage concepts. Our research covers methods controlling data partitioning, distributed processing and data assimilation as well. Partitioning (also referred to as “Tiling”) is a very delicate yet crucial step having impact on the whole processing. After algorithms have processed these “chunks” or “tiles” of data, partial results are collected to carry out data assimilation or “Stitching”. The paper presents the above-mentioned prototype through a case study dealing with country-wide processing of raster imagery. Assessment is carried out by comparing the results (computing time, accuracy, etc.) to concurrent solutions. Further investigations on algorithmic and implementation details are in focus for the near future.
  • Erscheinungsjahr: 2016
  • Herausgeber: FOSS4G, OSGeo
  • Sprache: Englisch
22:55 FOSS4G, OSGeo Englisch 2016

OGC's Land Administration Working Group – Building Bridges between communities

Land administration is an ongoing concern in many countries of the world and less than 30% of the landcover is properly titled or surveyed. This lack leads to insecurity of tenure, economic barriers, land grabbing and is a major problem to resolving land conflicts. Land administration frameworks have to support a wide variety of regulatory and policy environments and interoperability is key in providing the necessary flexibility. In order to avoid the creation of yet another set of data silos OGC members set out to form a Domain Working Group (DWG) on Land Administration as a forum to explore existing interoperability standards and best practices in this domain. The presentation will focus on this newly established working group and introduce to some of the key points of interest. While there are some standards describing elements of an administrative system (for example ISO LADM), there is no consistent use of geospatial description of land records or adequate rules for defining and describing the quality of the records. The group will work to provide a common vocabulary for the locational aspects of land administration databases and will also be a forum for connecting suitable technology for data linkage and quality assessment. Some of the key players in the Land Administration domain have created Open Source tools like FLOSS SOLA (FAO) and STDM (GLTN and UN Habitat) which are based on core OSGeo technology and already make extensive use OGC standards.
  • Erscheinungsjahr: 2016
  • Herausgeber: FOSS4G, OSGeo
  • Sprache: Englisch
23:06 FOSS4G, OSGeo Englisch 2016

Getting it done at LocationTech

LocationTech is a working group developing advanced location aware technologies - which tells you exactly nothing about what is like to join LocationTech and get things done. That is what this talk is for - bringing together several project leads from the LocationTech stable to cover: How LocationTech is organized How project promotion, marketing and fundraising works Running a project in terms of committers, license selection and transparency Starting a new project, incubation and release This talk provides a background of LocationTech and we can answer your questions. The real focus is on covering the project experience as a developer. In the past we have focused on a lot of the great technology taking shape at LocationTech, this year we would like an opportunity talk about the people, our culture and the cheerful attitude that goes into getting-it-done.
  • Erscheinungsjahr: 2016
  • Herausgeber: FOSS4G, OSGeo
  • Sprache: Englisch
24:14 FOSS4G, OSGeo Englisch 2016

Geomajas: Where did we go wrong?

Geomajas is an open source geospatial web development framework that has been around for almost a decade. Despite lots of hard work from our community, until today we have not been able to turn Geomajas into the big success we initially planned. I have been around Geomajas from almost the beginning, as developer, architect and PSC member. During this talk I will shine a personal light on my hate love affair with Geomajas. I will be sharing my observations on some decisions that had a huge effect on the evolution of the framework and try to pass on my vision on how to learn from both our mistakes and successes. To conclude I will to reach out to fellow OSGeo projects, and share my view on how we, as the open source geospatial community, can help each other in becoming more successful open source projects.
  • Erscheinungsjahr: 2016
  • Herausgeber: FOSS4G, OSGeo
  • Sprache: Englisch
20:30 FOSS4G, OSGeo Englisch 2016

OSM Stats: Rewarding contributors and real-time tracking of OSM

Mapathons are an increasingly effective way to get data into OpenStreetMap. The Missing Maps project hosts mapathons to increase the amount of data in areas that don't have large local OSM communities. The American Red Cross and Development Seed have built an analytics platform that tracks user trends in real-time and rewards contributors for their efforts, as can be seen at missingmaps.org OSM-stats tracks user's activity, consistency and relative reputation, reporting detailed metrics and awarding a variety of themed badges based on the type and magnitude of contributions. Badges range from simple tasks ("Add 4 roads") to challenging ("Map in 10 countries"). Leaderboard pages display up to date detail on the most active users for a current project, while hashtag groupings display statistics to be separated out, allowing tracking of groups. A map of each users commits can be seen, as can a map view indicating the last 100 changes. Most of the contributions for the Missing Maps project occur during mapathons where hundreds of volunteers submit edits and additions over a couple of hours. This means that the system needs to handle large spikes of activity when thousands of edits are added. We deployed the OSM-stats components using AWS Lambda functions and Kinesis streams. These scale very well to meet the needs of Mapathons and incur minimal cost when not in use.
  • Erscheinungsjahr: 2016
  • Herausgeber: FOSS4G, OSGeo
  • Sprache: Englisch
23:24 FOSS4G, OSGeo Englisch 2016

Train the users! No GIS is easy...

Every software platform needs three things in order to be successful: Good and solid software, reliable support and maintenance services in order to make it run smoothly, and training possibilities for the endusers to make sure they use it in a most effective way. Open geospatial software is the basis. And, with the progress that has been made in the last few years, it is among the best around. Support and other services are more and more common. In the Netherlands, you can identify several commercial organizations specializing in FOSS4G, and others adding it to their existing portfolio of services. But what about training possibilities? Few specialized training services for geospatial software are existing, and service providers might do some on-the-job training, but it is by no means comparable to the well oiled training machine that distributers of closed source software usually run. So, how to set up training courses for open source geo? At the Dutch Geo Academie we have some experience with this kind of training, and we’d like to share some ideas.
  • Erscheinungsjahr: 2016
  • Herausgeber: FOSS4G, OSGeo
  • Sprache: Englisch
27:29 FOSS4G, OSGeo Englisch 2016

GeoServer in Production: we do it, here is how!

The presentation will describe how to setup a production system based on GeoServer from the points of view of performance, availability and security. The suggestions will start covering how a single node GeoServer should be prepared for internet usage, tuning logging, connection pools, security, data and JVM preparation, keeping disk, memory and CPU usage in check within the limits of the available resources. We’ll then move to tools used to monitor the production instances, ranging from probes to request auditing and watch-dogs. Finally the presentation will cover setting up a cluster of server and the strategies for keeping them in synch, from the traditional multi-tier setup (testing vs production) to the systems that need to keep an ever evolving catalog of layers constantly on-line and in synch.
  • Erscheinungsjahr: 2016
  • Herausgeber: FOSS4G, OSGeo
  • Sprache: Englisch
28:14 FOSS4G, OSGeo Englisch 2016

Leaflet.annotate - Semantic markup for geographic web maps in HTML

I investigated the public Schema.org vocabulary, the Dublin Core Metadata Element Set, the HTML living standard and SVG 1.1 to make it easy for map makers and publishers to advance the markup they publish. With an understanding of geographic web maps as documents of composite structure i want to share and discuss a LeafletJS implementation representing this investigation. Building on the descriptive markup and this model of a geographic web map i also want to share the idea of developing a user dialog which could support readers of maps in analyzing WHO contributed WHERE, WHEN - and WHAT is the map about. The Leaflet.annotate API can be seen as an interface proposal for other authoring tools or geographic content management systems and with that I hope to contribute to a discussion around accessible and responsible publishing of geographic maps on the WWW.
  • Erscheinungsjahr: 2016
  • Herausgeber: FOSS4G, OSGeo
  • Sprache: Englisch
26:54 FOSS4G, OSGeo Englisch 2016

Deegree Enterprise - Open Source to get a grip on complex spatial data infrastructure demands

deegree surely is one of the most mature OSGeo projects. Its OGC web services are comprehensive and some of them even are reference implementations. When it comes to building spatial data infrastructures like INSPIRE you need a little bit more than spatial data and services. You need a whole infrastructure capable to meet high performance goals and 24x7 availability, which has to comply to strict Service Level Agreements. In short: you need a comprehensive software stack containing tools for service and data management along with metadata and user management tools for publishing spatial data in a trusted and secure environment are needed along with appropriate monitoring tools to assure the infrastructures availability. The deegree community project did not provide this functionality yet and that was why two German companies grit and lat/lon joined forces to build the “deegree Enterprise Edition”. deegree Enterprise Edition contains all the tools mentioned above. Further on it includes appropriate contracts offering software maintenance and professional support. These contracts offer the same support and performance as maintenance contracts for proprietary software do and fully meet the requirements of the maintenance contracts used in the German Public Sector. Nevertheless deegree Enterprise Edition is still open source. But it is open source with guaranteed SLAs. Such it offers an opportunity to all organisations under INSPIRE obligations to professionally operate INSPIRE. The presentation shows: the motivation to build deegree Enterprise how the deegree Enterprise Edition differs from the community edition how the business model is working
  • Erscheinungsjahr: 2016
  • Herausgeber: FOSS4G, OSGeo
  • Sprache: Englisch
22:16 FOSS4G, OSGeo Englisch 2016

Using PostGIS in a real advanced way!

A lot of people use PostGIS as a basic GIS toolbox, but very few use it in a real advanced way. To progress towards full PostGIS power, we can first make use of advanced native PostGIS functions. Using some extensions related to PostGIS, such as SFCGAL (for 3D data management), PostGIS Raster, PgPointCloud or even the latest pgsql-postal (for address normalization)... Then we can mix PostGIS functions with advanced standardized SQL features provided by PostgreSQL 9.x itself (CTE, Window functions, FDW, join and aggregate pushdowns…). Even better, use PostgreSQL bindings for data analysis languages such as R or Python to create your own dedicated function set, and integrate them into your SQL queries. We conclude this session with perspectives on what the combination between GIS and data science could be.
  • Erscheinungsjahr: 2016
  • Herausgeber: FOSS4G, OSGeo
  • Sprache: Englisch
25:23 FOSS4G, OSGeo Englisch 2016

GeoMapFish 2 - Ready for the Future

GeoMapFish is an open source WebGIS platform developed in close collaboration with a large user group. The second version offers a modern UI based on AngularJS. OpenLayers 3 and an OGC architecture allow to use different cartographic engines. Highly integrated platform, large features scope, fine grained security, reporting engine, top performances and excellent quality of service are characteristics of the solution. In this talk we’ll present the technical aspects of the platform and its modular architecture.
  • Erscheinungsjahr: 2016
  • Herausgeber: FOSS4G, OSGeo
  • Sprache: Englisch
30:42 FOSS4G, OSGeo Englisch 2016

Serving earth observation data with GeoServer: addressing real world requirements

The presentation will cover GeoSolutions experience in setting up GeoServer based production systems providing access to earth observation products, with indications of technical challenges, solutions, and deployment suggestion. The presentations will cover topics such as setting up a single unified mosaic from all the available data sources, tailoring access to it to different users, determining the most appropriate stacking order, dealing with multiresolution, different coordinate systems, multiband data, SAR integration, searching for the most appropriate products using a mix of WFS, CSW and so on, serving imagery with high performance WMS and WMTS, performing small and large data extractions with WCS and WPS, closing up with deployment examples and suggestions.
  • Erscheinungsjahr: 2016
  • Herausgeber: FOSS4G, OSGeo
  • Sprache: Englisch
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