On Jul 12, 2010, at 8:44 PM, Lee Seongjoo wrote: > Hello community, > > 1. I have point data, let's say -2.0, 1.0, 3.0, as 3D coordinates. I read > usage explanation and examined the test files but I am still not very sure > how index is created from those point data.
Rtrees work on boxes, not merely points. The tests demonstrate how to make a 3d index and insert points into it. <http://trac.gispython.org/lab/browser/Rtree/trunk/tests/index.txt#L167> I would note that Rtrees are not particularly good for high volume point data, and I would suggest looking at other indexing alternatives if this is your desire. > > 2. I thought that index boundaries would be determined automatically by > evaluating the point coordinate inserted. Yes, it does. The tree will readjust itself as necessary. Rtrees can be a bit susceptible to insertion order, which can cause the organization of the tree to be different depending on the order bboxes are inserted into the tree. > But Rtree package requires axis boundary values. Example? Do the docs say this anywhere? _______________________________________________ Community mailing list [email protected] http://lists.gispython.org/mailman/listinfo/community
