Re: Free GIS for realtime data and 3D visualization?

On Mar 5, 2007, at 16:50, Peter Fischer wrote:

> Hi Brent,
>
> thank you very much for your answer, it was very helpful. One  
> question:
> the NVIZ component, could I use that isolated from the rest of  
> GRASS GIS, i.e.
> without all the other components to keep my system small and fast?
> Yet another question: Do you know whether there is a fast, thin  
> client for
> accessing Web Map Services (WMS) which does caching when getting  
> raster
> data (so that e.g. when I shift the current field of view, the  
> client not always has to
> reload new data from the server)? Whether 3D or only 2D plays no  
> role, optional
> 3D would be nice, however.

OpenLayers and ossimPlanet would work for this.

OpenLayers.org - not 3D but caching - Javascript.

http://www.ossim.org/OSSIM/ossimPlanet.html - 3D, caching, but not a  
web client.

> And one last question: When I get realtime data from a server, e.g.  
> GPS data of
> some object, is it possible to overlay that data over a map with a WMS
> without storing the data in a database (which, I think would slow  
> down the
> realtime process because of the hard disk access)? Speed is an  
> issue in my
> scenario.

Either of those might do it. I know ossimPlanet can overlay shape  
files. There may be some OpenLayers drivers for GPS data but I don't  
know.

	Allan

>
> You would greatly help me since I am a newbie in this area, so be  
> thanked in
> advance for any help.
>
> Best regards, Peter.
>
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-- 
Allan Doyle
+1.781.433.2695
[email protected]