Integrate projects from HOTOSM api

[ramyaragupathy]

Related #5, #7, #8

[ramyaragupathy]

Investigating on Issue #8 at present

[ramyaragupathy]

Figured out individual polygon extraction from a Multipolygon. Closed #8.

Next step was to run queries against each of the polygon and then merge results from different polygons into one. Initially tried the overpass queries for each polygon using poly bbox feature of Overpass. However queries failed due to URL length limitations. So instead of using the polygon boundary, converted the polygon coords to a rectangular bbox boundary using terraform library. However this process fails to fetch data from Overpass because of too many requests from the same ip address. The most complex multipolygon has around 206 polygons, which translates to 206 overpass queries.

Also this overpass method is not scalable, since there are lots of known limitations like quota allocation for ip, memory allocation failure, etc. Need to get clarification of the viz objective.

So figuring out other options like Athena #9

[ramyaragupathy]

Waiting to get access token for export tool #10