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26:37 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2016

Sat-utils: Landsat, Sentinel and the use of open raster data

Open satellite data from the US and EU have provided scientists and businesses with a wealth of data, but it can be difficult to fully easily access and process it. Recent efforts to put Sentinel-2 data on AWS S3 along with Landsat-8 has made it easier to build tools to access both data sources. At Development Seed, we are building tools called sat-utils to process and access open raster data like Landsat and Sentinel. We've expanded development on the tools to be a suite of Python libraries and command line tools for querying, downloading, managing, and processing other remote sensing data. It's been two years since we've launched the first sat-util, landsat-util, which has proven to be a valuable tool with a growing user base. sentinel-util is an tool that will provide the same easy access to data that landsat-util provides. We will discuss the processing for turning spectral band data into usable products such as color corrected RGB images, radiance data, top of the atmosphere reflectance, and various indices. We will also demonstrate the available APIs we have for open raster data: sentinel-api and landsat-api, that our client utils use for searching available metadata.
  • Published: 2016
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
20:30 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 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.
  • Published: 2016
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
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