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saleiva/bounding circle on cartodb

Forked from andrewxhill/bounding circle on cartodb
Created February 23, 2012 16:29
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Creates a bounding circle from the_geom_webmercator on cartodb
Raw
bounding circle on cartodb
SELECT
ST_Buffer(
st_centroid(ST_Union(the_geom_webmercator)),
st_distance(
st_centroid(ST_Union(the_geom_webmercator)),
ST_EndPoint(ST_LongestLine(
ST_Union(the_geom_webmercator),
ST_Union(the_geom_webmercator)
))
)
) as the_geom_webmercator
FROM table_name GROUP BY some_column
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