[postgis-users] A question on ST_RemEdgeModFace usability
Andrea Peri
aperi2007 at gmail.com
Thu Apr 12 13:43:47 PDT 2012
Hi, strk,
thx for explaination.
>> Is this allowed ?
>
>I'm redrawing the schema for simplification.
>
>You ask:
>assuming there's a TopoGeometry T1 defined by F1,
>is the following editing allowed ?
>
> +----+----+ +---------+
> | | | | |
> | F1 e F2 | => | F1 |
> | | | | |
> +----+----+ +---------+
>
>No, because doing so would change the shape of T1.
>
>--strk;
So, I guess, if I have a topology constraint by a topogeometry layer.
This is a really big question, because I understand that if I put a
topogeometry over a topology I lock (practically) the topology.
Infact I have quite few choice to editing it if I have put a TopoGeometry
on it.
Perhaps
I could try this option ?
Always with a TopoGeometry applied over it.
Topogeometry T1 on Face F1.
First change edge from this
(moving the external edge of F2 and moving also the edge "e")
I guess the ST_ChangeEdge should allow me move the edge "e".
+----+----+ +---------+-----+
| | | | | |
| F1 e F2 | => | F1 e F2 |
| | | | | |
+----+----+ +---------+-----+
and after this remove the external edge of F2
+---------+
| |
=> | F1 e
| |
+---------+
Is this allowed ?
Andrea
--
-----------------
Andrea Peri
. . . . . . . . .
qwerty àèìòù
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