Thanks, Luca and David. Changing the SLD sounds like a good approach,
and one that would not likely have come up with on my own (I've never
played with SLDs, but that's about to change).
That's interesting, that a tile cache could be automatically invalidated
when its style changes....
David
On 4/28/2011 6:00 AM, David Winslow wrote:
My first thought would be to create a VIEW in Postgres, joining your
spatial information with the secondary information that you want to
use for styling. Rather than configuring your actual spatial table in
GeoServer, you would set GeoServer up to serve tiles from the view,
which would automatically reflect updates to the styling information.
It's fairly simple from there to create an SLD which determines
styling details based on feature attributes, and all map viewers would
see updates immediately (apart from browser caching.) There are some
basic examples of such data-driven styles in the "SLD Cookbook"
section of the user manual.
The suggestion of regenerating SLDs when data changes is also a good
one, especially if you don't want to run a postgres server. If you
are using the GeoWebCache service embedded in GeoServer then your
cache will automatically be invalidated when the style is updated, so
you would be able to use cached tiles with minimal upkeep.
--
David Winslow
OpenGeo - http://opengeo.org/
On Wed, Apr 27, 2011 at 9:37 PM, Luca Morandini <[email protected]
<mailto:[email protected]>> wrote:
On 04/28/2011 02:59 AM, David Rush wrote:
>
> Any quick-start recommendations to get me running in the right
> direction(s) would be much appreciated....
Well, there are number of options... but if you're experienced in
XML, you may try
to change the styling that is defined in an SLD file (an XML file)
rather than the
Shapefile.
It could work out as follows:
1) A new file upload/web-service request comes along.
2) Those new data are converted into an SLD style file (at every
section's polygon
is associated a symbol according to the new data).
3) Using the ReST interface, the SLD file is uploaded and replaces
the previous one.
4) Every new request to GeoServer now uses the symbols based on
new data.
Regards,
Luca Morandini
http://www.lucamorandini.it
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