[postgis-users] PostGIS layer not rendering

Andreas Neumann a.neumann at carto.net
Mon Jul 27 11:32:59 PDT 2009


without seeing the result - there could be several issues:

* you need proper primary keys for display in QGIS (e.g. a sequence or 
an  integer type column with unique data) - maybe you don't have a 
column that qualifies as a primary key?
* most GIS (including QGIS) don't allow mixtures of geometry types (e.g. 
points mixed with lines, etc.)

There could be other issues as well.

Andreas

ahmed at elegantdesigns.ca wrote:
> Dear List,
>
> After doing some query analysis, series of inserts and joins, then
> vaccuming the layer, QGIS fails to render a layer.
> The only way i can show the layer is if i save it as a shp file, then
> convert back to postgis with spit.
>
> note that the layer also fails to open in udig.
>
> Any ideas on what could be causing this?
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