[postgis-users] distance between 2 polygons

[Nicklas Avén]

Hallo


> Does A distance of 0 mean that the polygons touch each other or it 
> means that their bounding box touch each other?
 From ST_Distance distance 0 menas that they are touching or overlapping 
each other

> What does a distance of 100 mean?. Is it the shortest distance between 
> the 2 polygons or the distance between some random point on the 
> polygon or on the surface?
>
It is the shortest distance between two polygons. You can use 
ST_ShortestLine to find what that two points (first and last point in 
the resulting line)

HTH
Nicklas



> thanks
> Steve
>
>
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