[postgis-users] service areas ( I want a polygon of the areas that only have one provider)

[BladeOfLight16]

On Fri, Aug 23, 2013 at 5:30 AM, Nathaniel Clay <clay.nathaniel at gmail.com>wrote:

> I have a table of polygons that overlap with each other, I need the
> polygon of the areas that only have one provider eg do not overlap. Please
> find attached the shape file. Any help would be greatly appreciated!!
>

Your question isn't completely clear. Are you trying to get all the
polygons that don't overlap another polygon, or are you looking for all the
areas that contain exactly 1 polygon (as in something akin to symmetric
difference)?
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