How about the following situations? Scenario 1 2 lines zigzagging over the space. Some time, a line crosses over another and then crosses again to return. Can DE-9IM tell with a pattern?
Scenario 2. 2 lines zigzagging over the space. Some time, they meet and touch each other, but never cross each other. There may be gaps between them. Will there be any DE-9IM for this situation? Regards, David On Wed, 6 Jul 2022 at 17:00, Martin Davis <[email protected]> wrote: > You haven't specified what you mean by "gap". The DE-9IM model is a > "global" model, in that it considers the input geometries as a whole. You > can use the DE-9IM to determine if two geometries have a "gap" between them > via ST_Disjoint. > > On Wed, Jul 6, 2022 at 8:48 AM Shaozhong SHI <[email protected]> > wrote: > >> Is there a DE-9IM pattern for gaps? >> Regards, >> David >> _______________________________________________ >> postgis-users mailing list >> [email protected] >> https://lists.osgeo.org/mailman/listinfo/postgis-users >> > _______________________________________________ > postgis-users mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/postgis-users >
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