Thursday, 7 March 2019

overlapping features - Finding outermost border of set of geomertries (circles) using PostGIS?


I have a (large) set of geometries (circles) that overlap.! I would like to find the nearest location outside of this group from my current location. In this example my location is the black dot. In my scenario I would like to get out of this group of circles and find the edge / border of this group, do I can draw a point on (or just outside of it), this would be the red dot.


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Is there any way to achieve this using postgis without first having to draw an infinite amount of points to test against?




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