[GRASS-user] gdal 1.5 and WMS ressource --- PREVIOUSLY:How to best access hundreds of orthophotos -- mapserver as WMS server?

[Dylan Beaudette]

On Thursday 03 January 2008, Moritz Lennert wrote:
> On 03/01/08 14:06, Rainer M Krug wrote:
> > Moritz Lennert wrote:
> >> On 02/01/08 21:37, sebastian sauer wrote:
> >>> Wed 02 Jan 2008 18:27, Rainer M Krug wrote:
> >>>> you wrote in the a previous thread that one can use gdal 1.5
> >>>> directly to access a WMS ressource which is defined in an xml file
> >>>> (see snippet below).
> >>>> As 1.5 is out (and I compiled with MrSid support - works nicely by
> >>>> the way), I looked but could find no information on that feature.
> >>>> Could you please elaborate how I can use this instead of setting up
> >>>> a mapserver on localhost?
> >>>
> >>> my understanding was - feel free to correct me - dylan was refering to
> >>> the OGR/GDAL vrt driver.
> >>>
> >>> http://www.gdal.org/gdal_vrttut.html
> >>> http://www.gdal.org/ogr/drv_vrt.html
> >>
> >> I would rather guess it was the "WMS -- Web Map Services" driver:
> >
> > Ah - now I understand. I still have to set up a WMS server, but I can
> > access it through gdal instead of using r.in.wms.
>
> Well, if you have the data directly accessible, I don't know if it is
> the most efficient way to access it via a webserver and wms. The main
> insterest of this is obviously to get data from a distant wms server...
>
> Moritz

Right. I think that within the context of the original discussion (?) the 
point was access to a tiled, indexed image catalog of sorts. I had suggested 
adding internal overviews to the pile of images (gdaladdo), creating a tile 
index (gdaltindex), and then making the pile of images accessible via WMS 
(mapserver) so that chunks of the entire virtual mosaic could be imported 
into a GRASS region- either by r.in.wms (or r.in.gdal with some help).

If I get a chance to mess around with this, I will post back a worked out 
example.

Cheers,

Dylan



-- 
Dylan Beaudette
Soil Resource Laboratory
http://casoilresource.lawr.ucdavis.edu/
University of California at Davis
530.754.7341