I am using the query below to find out the intersection coordinates of 2 Polygons and it's working fine, but how can I use or modify the query to find the intersection area coordinates for multiple (or N number of) polygons?
SELECT ST_AsText(
ST_INTERSECTION(
ST_GeomFromText('POLYGON((1.25 9.5,1.375 18.25,7.25 17.875,7.375 9.5,1.25 9.5))'),
ST_GeomFromText('POLYGON((1.25 9.5,1.375 18.25,7.25 17.875,7.375 9.5,1.25 9.5))')
)
);
What other alternative do I have?
Best Answer
As katahdin wrote, ST_Intersection works only with two geometries. I don't know a variant of it what works on arrays. If you have your geometries in one table, you can write a function that will do the job, like this:
Example call: