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Return the SRID corresponding to the UTM zone for a given Latitude and Longtitude in WSG84
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| """ | |
| Point must be in srid 4326 (Mercator projection) | |
| Based on http://lists.osgeo.org/pipermail/postgis-users/2005-December/010204.html | |
| """ | |
| def point_to_srid(lat, lng): | |
| if lat > 0: | |
| base_srid = 32600 # northern hemisphere | |
| else: | |
| base_srid = 32700 | |
| utm = floor((lng + 186) / 6) | |
| return base_srid + utm |
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