[postgis-users] Topology and grade separation.

[Simon Greener]

Thanks Sandro.

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On 23 Jul 2022, 11:14, at 11:14, Sandro Santilli <strk at kbt.io> wrote:
>On Wed, Jul 20, 2022 at 06:00:05PM +1000, Simon SPDBA Greener wrote:
>
>> I could run up a quick test but does PostGIS topology have a
>mechanism for
>> handling this situation? How does it handle linestrings defined as
>XYZ?
>
>PostGIS Topology *forces* any planar intersection to generate a node.
>There's no way to represent a river not intersecting a bridge over it.
>Thee only handling of Z is to carry it around and interpolate it when
>creating new intersections: it's a 2.5D topology.
>
>What you describe may be better implemented with pgRouting.
>
>--strk;
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