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antoniolocandro/WGS-Area-km2

Created December 5, 2013 15:50
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Calculate area of polygon in GCS WGS 84 in Km2 using POSTGIS ST_Area
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WGS-Area-km2
-- Calculate Km2 of a polygon stores in GCS WGS84
-- by default ST_Area returns the calculation in meters so the appropriate conversion was applied
-- fir_area_20131205 was the example table used
-- the spatial data was in a geom field so geom::geography was added
SELECT ST_Area(geom::geography)/1000000 as sqKM from fir_area_20131205
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