[Qgis-user] Re: Multiple geometries in an import file (Darryl Bailey)

[Darryl Bailey]

Hi,

I've been thinking along simialir lines with property survey data.  I
figured that its not really the GIS program's task to do this, but the
underlying file or data structure.  The way i see it is that instead of
having the coords "hard coded" for the sewer lines, it would be preferable
that the sewer lines coords reference those coords as defined by the
manholes.  So if you change the manholes' coords then the sewer line is
automatically updated.

I thought this may be catered for by SpatiaLite and put the query to their
user list and got quite a good response.  Basically this sort of setup
(strict topology) hampers processing speed(and viewing speed for that
matter), which is what the majority of the end product of a GIS is used
for.  This got me thinking - keep the topological data as attribute data and
then create the spatial data as and when required so that the coords are
hard coded into the actual spatial file/dataset.  Maybe a QGis plugin could
be created to do this.

Here is a link to the SpatiaLite disscussion
http://groups.google.com/group/spatialite-users/browse_thread/thread/39a355fab8202081/3883d30053e35d07#3883d30053e35d07

Regards
Darryl Bailey
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20110722/c4236878/attachment.html>