[Freegis-list] Free GIS for realtime data and 3D visualization?

[=?windows-1252?Q?Markus_M=FCller?=]

Peter,

I have to admit that I did not follow the discussion as a whole. Just 
wanted to say that if you are interested in OGC Web Services and 3D it 
might be a good idea to have a look at deegree (www.deegree.org). A 3D 
database and visualisation service (WTS) as well as WMS/WFS/WCS are 
available there. In April/May the 2.1 demos of these components will be 
released - these will be very easy to install (WAR-archives, all 
inclusive). If you are interested before, you would have to access the 
deegree CVS directly.


regards,

Markus


Peter Fischer schrieb:
> Thank you all for your answers, Brent, Markus, Daniel and Paul,
>
> It looks like GRASS GIS (because of its 3D capabilities) and/or UMN 
> MapServer
> are good choices for me. Some details (especially concerning WMS/WFS/WCS)
> are still not that clear to me. At best the following could be 
> realized by a GRASS
> GIS configuration which conforms to a WMS/WFS/WCS architecture:
>
> Some questions do I have to your answers:
>
> 1. I thought the WMS server puts together the data it gets from the WFS
> (vector/feature data) and from the WCS (raster data) into a single raster
> image?
> 2. Daniel, as far as I have figured out, WFS basic is without write 
> access, and
> WFS-T (transactional) is with write access. Do UMN MapServer or GRASS
> GIS (Markus) already support this? It would be important to be able 
> not only to
> change styles (like with the SLDs) but to do annotations (I tried FIST 
> on their
> site, its nice, but annotations failed when I tried – the map wasn’t 
> displayed
> any more) or even change the vector data already stored in the vector 
> layer
> database (WFS for example).
> 3. With GRASS GIS, is it possible that when the user interacts with 
> one view (in
> the tablet PC ), he also manipulates (shift, zoom, change layer) the 
> other view
> (in the table)? If not yet, would GRASS GIS be customizable to do so?
> 4. Does GRASS GIS (even over a WMS/WFS/WCS infrastructure) support POIs
> so if the user clicks on a point in a map I can reference to a 
> database to
> display information about the object (POI) he clicked onto?
> 5. In the same constellation (GRASS GIS with WMS/WFS/WCS), is display of
> realtime vector data coming in from sensors like GPS signals overlayed 
> over
> the map possible? – The architecture would be an additional data 
> source (to
> WFS and WCS) with the GPS signals and the WMS puts them together to
> one raster image and sends them to the multiple views? – By the way, the
> views are different, not identical.
>
> So it would be nice to realize such an architecture, if possible 
> solely with
> GRASS GIS or, if reasonable, together with UMN MapServer.
>
> I can not thank you often enough for your help so far, it would be 
> awesome if you
> could also answer the questions above. – Many thanks and till soon, I 
> will let you
> know my decision and experiences I will get with it.
>
> Best regards,
>
> Peter.
>
>
> */Daniel Calvelo <dca.gis at gmail.com>/* wrote:
>
>     Hi Peter, in the following I assume you opt for OGC protocols.
>
>     On 3/13/07, Peter Fischer wrote:
>     [...]
>     > Is it possible with WMS (maybe using Styled Layer Descriptors,
>     SLD) to write
>     > back vector data into the layers stored on the server (WFS for
>     vector data I
>     > guess)? Or is access read-only?
>
>     That is up to your client application. In the WMS protocol you ask for
>     a map (and specify its appearance with SLD) and get an image, so you
>     would have to code in javascript or some other client-side tool the
>     means to send back mouse/keyboard events according to position within
>     the image, and a server-side thingie to feed those to a database.
>
>     OGC defines WFS-T, the transactional web feature service, which aims
>     at webservice-based vector editing. For a nice demo and framework, see
>     the FIST site.
>
>     > Is it possible that the views interact with each other, e.g. on
>     the tablet
>     > shifting the map displayed onto the table (in the other view) or
>     switching
>     > to another map/layer?
>
>     That should be provided by your server, it seems quite feasible. You
>     will have to pool the server continiously for updates if you wish to
>     make them resemble real-time.
>
>     > Are there raster layers in WMS/WFS I can switch on and off?
>
>     Of course. Each layer is in fact a different WMS request.
>
>     > Can I define points of interest (POI) so if the user clicks on a
>     point in a
>     > map I can reference to a database to display information about
>     the object
>     > (POI) he clicked onto?
>
>     See the first point above. MapServer allows for this kind of x,y
>     query natively.
>
>     > Can I control the contents of the view (shift, zoom etc.) from
>     the outside
>     > e.g. by a script/program, or are there only the manipulators in
>     the view's
>     > interface for zooming, shifting the map cutout displayed in the
>     view (e.g.
>     > the GRASS viewer or others)?
>
>     Sorry, I don't quite get this one.
>
>     HTH, Daniel.
>
>     -- 
>     -- Daniel Calvelo Aros
>
>
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-- 
Dr. Markus Müller
l a t / l o n  GmbH (Hamburg)
Gluckstr. 53a			22081 Hamburg, Germany
phone ++49 +177 2470742		fax ++49 +228 18496-29
http://www.lat-lon.de		http://www.deegree.org
--