[postgis-users] ST_3dintersects returns false for linestrings pairs with touching vertex

[Alexandre Neto]

Hi,

I am having a strange issue with st_3dintersects. I have two linestring
that share the same end vertex. Nevertheless, using ST_3dintersects returns
false.

      SELECT ST_3dintersects(st_geometryfromtext('LINESTRING Z (-27922.1593
-110233.7616 147.2259,-27928.084 -110230.8462 147.3629,-27930.6374
-110229.9248 147.3629,-27931.6207 -110229.587 147.3094,-27932.3841
-110229.275 147.3676,-27933.1861 -110228.9467 147.4365,-27937.0309
-110227.3638 147.7729,-27937.7892 -110227.0474 147.8412,-27938.6259
-110226.6885 147.9075,-27939.4617 -110226.3287 147.9663,-27943.6905
-110224.5169 148.2353,-27944.5442 -110224.1538 148.2687,-27945.6634
-110223.6871 148.2849,-27946.7835 -110223.2224 148.2982,-27952.3498
-110220.9011 148.3594,-27953.4568 -110220.4353 148.3756,-27966.8502
-110214.6482 148.7361,-27969.516 -110213.4996 148.7961,-27972.1805
-110212.3494 148.8566,-27974.1264 -110211.5032 148.9768,-27975.4229
-110210.9441 149.0093)'),
      st_geometryfromtext('LINESTRING Z (-28001.1829 -110201.8973
149.4396,-28000.3665 -110199.7073 149.3765,-27995.4183 -110201.8041
149.3354,-27975.4229 -110210.9441 149.0093)'))

Any idea what could be happening in here?

Thanks,

Alexandre Neto
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