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Urban Start-up Agglomeration and Venture Capital Investment (view source)

3 bytes removed , 10:52, 26 September 2017

*https://en.wikipedia.org/wiki/GIS_file_formats

====Useful functions for spatial joins====

'''sum(expression)''': aggregate to return a sum for a set of records

'''ST_GeoHash(geometry A)''': Returns a text string representing the GeoHash of the bounds of the object.

====Native functions for ~~geogrphy=~~geography===

'''ST_AsText(geography)''' returns text

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