On 12/1/18, Larry Brasfield <brasfield.la...@gmail.com> wrote: > The documentation at https://www.sqlite.org/geopoly.html , at 3.8. for > geopoly_contains_point(), asserts that the function “returns true if and > only if the coordinate X,Y is inside or on the boundary of the polygon P.” > As now implemented, in the v3.26 release, it returns 1 where the point is on > a boundary and 2 where the point is inside of the boundary.
The geopoly_overlap() and geopoly_within() routines are similarly modest about what they compute. Geopoly_within(A,B) returns +1 if B is completely contained inside of A, and returns +2 if A and B are the same polygon. Geopoly_overlap(A,B) returns 4 different non-zero values (1, 2, 3, and 4) depending on whether or not A is contained in B (2), B is contained in A (3), A and B are the same polygon (4), or if they just overlap (1). I haven't documented those behaviors, because I wanted to leave myself some wiggle room in case I need to change the behavior in the future. -- D. Richard Hipp d...@sqlite.org _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
