Let's say

http://watch.tampabay.com/homes/pinellas/neighborhood/allendale/

and

http://houstoncrimemaps.com/neighborhood/university-place/

as examples. The key aspect here is that you extract attribute data
with *spatial* operations (like operation on values belonging to a
point within a polygon). This is far more cumbersome to do if you
don't have access to the spatial operations on the DAL level (=lack of
spatial indexes, more complex application code, etc).

If you just want to show fairly statis maps and do no operations on
the content itself except for maybe a 'show more' or a tooltip here
and there on points, you don't need this. However if you want to
interact with feature *data* based on map input, it's pretty much a
must.

On Apr 23, 11:22 pm, Tim Michelsen <[email protected]>
wrote:
> > Well, there *is* a definition. A geographic information system (GIS),
> > or geographical information system, captures, stores, analyzes,
> > manages, and presents data that is linked to location. In the context
> > of web2py, it sure can make for a darn good interface to other GIS
> > related tools, but has no GIS functionality on it's own.
>
> Yes. got that definition.
> I think the integration stuff is more what I would like.
> Or at least what I see as a good starter.
> I would never do terrain analysis with a webgis system.
>
> > As an example
> > of where the framework itself *is* part of a GIS, see Geodjango. In
> > the first approach, you're pretty much limited by what your underlying
> > apps can do. With the second, you can implement spatial oriented
> > functionality yourself - and that's a significant difference.
>
> Do you have an example for such a geojango site?
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