Hi,
Im looking for some geoserver's geocoding code I saw many years ago.
Am I wrong, or geoserver had a geocoding pluging in an elder version, to
convert addresses in geographic coordinates?
Thanks in advance!
2008/11/20 Ivo Brodien <[EMAIL PROTECTED]>
> Hello everybody,
>
> I am sorry for answering so late. Thanks for the motivating answers.
>
> >> 1) Shoud it be WMS or WFS service?
> > Andrea Aime wrote:
> > It depends, with vector output there's always a grey area. As a rule
> > of thum, if the output has any styling (it has to contain color, line
> > width, filled polygons and the like, and be driven by an SLD) then
> > it should be a WMS output format, since there is no concept of
> > styling in WFS.
>
> Ok, I will do it as a WMS service then, since I the plan ist to
> deliver styled maps.
>
>
> > GeoServer already has two SVG based output formats, one that
> > is based on Batik and that supports SLD almost fully but it's kind
> > of slow, and another one that supports very limited styling but
> > is faster.
> > I don't know anything about these SVG profiles for mobile hardware,
> > but I guess you'll need total control over the output, so I suggest
> > you look into the one that does not do full styling, and adapt
> > it to your needs. The classes can be found in the WMS module,
> > org.vfny.geoserver.wms.responses.map.svg package, and in particular
> > the low styling high performance classes are SVGMapProducer and
> > EncodeSVG, whilst the full styling lower performance is
> > SVGBatikMapProducer.
>
> I started wit the cloning and adapting the SVGMapProdcer.java,
> EncodeSVG.java and added my Render so it can be choosen via the
> WebInterface as the SVG-Renderer.
>
>
> >> 3) my biggest concern using geoserver is that I am afraid I can't
> >> make use of the PostGIS function AsSVG() <http://svg.cc/pg/assvg/>
> >> where I could optimize output by setting relative coords and limit
> >> precision.
> >
> > True, a WMS output format receives a MapContext definitions, that
> > do in turn have FeatureSource object. A good output format must not
> > make assumptions on the backend, and the PostGIS data store won't
> > allow
> > you to make use of that function either.
> > Then again, you can use the GeoTools Decimator class to perform
> > a simple on the fly generalization (that class assumes you're using
> > a special coordinate sequence class for your geometries, we can
> > talk details about this in a separate mail).
>
> Okay so I guess I will just have to use external tools to make some
> nicer SVG Data instead of letting PostGIS make all the work, which I
> thought would be faster than doing it in Java. PostGIS also has the
> Simplify function which does the generalization. It would be nice, if
> we could talk about the Decimators generalization in separate mail as
> you suggested Andrea. It sounds as if I also could use this class to
> convert the geo data to my local screen device coordinate system, so
> the client does not neet to do calculations?
>
> >> 4) For my purpose I guess I would use SVG Basic instead of Tiny
> >> because Tiny profile does not support textpath element which is
> >> nice for street names.
> >> 5) A gzip output would also be nice to reduce the file size
> >
> > This is handled automatically by GeoServer already. There is a
> > filter installed in GeoServer that compresses text based outputs
> > on the fly. You just have to add the svg mime type (image/svg+xml)
> > to the list of compressed types, look into web.xml.
>
> Great, works fine.
>
> >> 6) Since I need a lot of map data to test navigation I would like
> >> to import OSM data (OpenStreetMap) into the PostGIS database. I
> >> know the tables of OSM are a mess
>
> I have to correct myself. The data povided by GeoFabrik is pretty
> nice. When I used a tool osm2psql it imported the whole table
> structure. THe GeoFabrik data is very simple.
>
> Cheers
> Ivo
>
>
>
>
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