MyPolygon

Ignite presentation in the WCMC informatics' Ignite session. A framework to get statistics from polygons drawn in a map

Transcript

1. MyPolygon Drawing Polygons to Understand the World
3. PicaJS Magpie RasterStats CartoDB Framework
4. PicaJS Magpie RasterStats CartoDB Framework
5. CoffeeScript Library Gets Polygon information Puts Magpie Statistics PicaJS
6. Gets Pica's polygons and stats requests Sends requests to RasterStats and CartoDB Gets stats from RasterStats and CartoDB Sends them back to Pica Magpie
7. CartoDB
8. CartoDB
9. RasterStats
10. How does it work ? Upload Get Polygon Change Resolution Check Size Choose Raster
11. For an error < 1% For a processing time < 1s What should be the resolution of an image? Problem to solve
12. 0 1 2 3 4 5 6 7 8 0 1000000 2000000 3000000 4000000 5000000 6000000 7000000 f(x) = 915083.71x - 428453.84 R² = 0.99 Time (s) Pixels Processed Almost Perfect Correlation
13. When number of pixels to process take less then 1 second : Choose Highest resolution! Solution
14. 3 images to choose: 10% 50% 100% Solution
15. 10 %
16. 50 %
17. 100 %
18. Advantages Framework for multiple apps Fast speeds Flexible Also creates tiles to represent data Advantages
19. Limitations Not very easy to install Starspan has not any new release for 2 years
20. Future Create an alternative to Starspan Use in new beautiful apps Use more data to test Error vs. Speed on RasterStats