Support for Geospatial Queries about heavydb

[billmaimone]

Definitely, we can collaborate on this.

[asuhan]

Note that there's a distance_in_meters function you can call to find the distance between two WGS-84 positions: https://github.com/mapd/mapd-core/blob/master/QueryEngine/ExtensionFunctions.hpp#L227. Example (taken from tests): SELECT DISTANCE_IN_METERS(-74.0059, 40.7217,-122.416667 , 37.783333) FROM test LIMIT 1;.

[benjaminjs]

Yeah, I've dug through the docs on the website. Looking for stuff like ST_Contains for polygons and points.

But the link to the source code is quite handy for seeing how these functions are implemented.

[m1mc]

contains should be easy by adding another function to compute barycentric coordinates w/ it for triangles and dot product for others etc.

[dfernan]

I'd merge this issue with this one: #58

[mflaxman10]

This should probably be closed with the 4.0 release, which now supports geo features, and ST_DISTANCE and ST_CONTAINS geoprocessing ops mentioned above. @m1mc, @billmaimone and @benjaminjs: are you finding what you need now? If not, perhaps open a new issue - MapD is looking for community contributions/priorities for its geo road map. ST_INTERSECTION, ST_AREA, etc. could make fun projects for interested geogeeks!

[benjaminjs]

Yep, exactly what I was looking for!