[postgis-users] topology example

[Denis Rouzaud]

Hi Sandro,

Thanks a lot for your attention.
I did not had so much time to look deeply into it these two days.

So far, I could not perform make check correctly due to some passwords 
problems.

Basically, I have a database in oracle (non spatial) in topobase 
(autocad) with pipes. I am migrating the whole thing to use Qgis to 
manage the network.
So I collected all the given errors when using toTopoGeom to first 
correct the geometry in autocad, then re-importing and re-creating the 
topology again.

I don't really understand how the topology is handled in postgis and 
what is for example written in the topogeom column.
There is still one main point which I don't understand. Why is there any 
control on the topology if there is validateTopology function?




On 02/28/2012 04:31 PM, Sandro Santilli wrote:
> On Fri, Feb 24, 2012 at 04:44:24PM +0100, Denis Rouzaud wrote:
>
>> Thanks a lot for your time and work!
>> Maybe, everything will autofix during the weekend ...
> Denis, this mail just to tell you that the ticket [1] has been worked
> a bit upon, but needs much more work. It's a robustness issue which
> may or may not be worked-around of by adding a tolerance parameter
> to your toTopoGeom calls. Let me know if it does.
>
> [1] http://trac.osgeo.org/postgis/ticket/1613
>
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