[postgis-users] topology overlapping of edges

Mario Jurcevic mario at geosar.ch
Fri Sep 28 05:50:03 PDT 2012

On 09/27/2012 10:06 AM, Sandro Santilli wrote:
> You can always skip all tests and insert the edges straight away, if
> you know exactly what's expected as the structure. It will be faster.
> You can then check with ST_ValidateTopology what's missing
> (theoretically). That's what the TIGER loader does, for example, but
> the input is already topological, no need to check.
My input data are already topological ( only lines are given ) so 
inserting straight  to table edge_data will work without noding and 
checking for intersections
  but what about next_left, next_right, etc pointers?


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