Re: [mapserver-users] Shapefile spatial index challenge

2015-10-23 Thread Fawcett, David (MNIT)
I have seen examples where for the purpose of overlay operations, someone chops up their large polys into smaller ones, each with an attribute that contains the id for the large poly. I don’t know if that would fit your use case. David. From: mapserver-users

Re: [mapserver-users] Shapefile spatial index challenge

2015-10-23 Thread Ben Madin
G’day Lydon, I feel your pain, but there is little benefit to creating more quadrants. The idea (as I understand it - could be wrong) is to be able to use a (fast) bounding box to find the polygons to test, rather than having to test against every polygon using more complex algorithms. I