[postgis-users] Re : postgis-users Digest, Vol 154, Issue 12

[Stephen Woodbridge]

On 12/14/2014 5:48 AM, Beekk Meess wrote:
> may be the solution exist if there is a way to changing the interne
> schemas(meta data level) of postgis topology
> --------------------------------------------

First, please do not post the WHOLE digest, edit it to the message you 
are responding to.

As strk (he is the developer and would know what is possible) mentioned:

> No way to avoid a node on intersection with postgis topology
> (and ISO Geometry Topology, differently from ISO Network Topology)
>
> --strk;

So it is unlikely that you can do this with the existing code, but if 
you work something out I'm sure we would be interested in see how you 
solve the problem.

Also, in your response to my network topology response, we assign 
zlevels to nodes not to edges or or polygons. So an intersection might 
look like:

                0
               /
        /----1----\
   0---/     0     \----0
            /
           /
          0


The ones are connected over the zero node but not to the zero node and 
where 0 and 1 are the zlevels.

You might be able to manage you data as multiple separate topologies and 
do something to keep linked node between the topologies synchronized if 
one changes.

Beyond that you have not explained your problem well enough for people 
to comment on.

-Steve