[postgis-users] Topological editing with OpenLayers

[Paul Ramsey]

Maybe on OL3?

http://vimeo.com/78298228

P

On Fri, Jan 3, 2014 at 4:14 AM, Jan Hartmann <j.l.h.hartmann at uva.nl> wrote:
> Hi all,
>
> I have written a simple OpenLayers-application to edit a PostGIS polygon
> layer: read one polygon from the server as GeoJSON, adapt it interactively,
> and write it back again via GeoJSON. Points are only moved, not created or
> deleted.
>
> The polygon layer is topologically correct: all adjoining polygons share the
> same points. With QGIS I can choose "topological editing", to automatically
> move corresponding points from adjoining polygons. With the GeoJSON
> application that is not possible: whenever I move a boundary point of one
> polygon, the corresponding points on adjoining polygons remain where they
> are.
>
> Is it possible with the new topology methods in PostGIS to write the
> following update procedure: whenever a changed polygon is written back into
> the database, all corresponding points on neighbouring polygons will be
> looked up and changed as well? I guess I would need some sort of pointer for
> all boundary points to all other boundary points that share the same
> location.
>
> Jan
>
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