Frank,
For my part, I would at least like to be able to get the map extent, but
I don't think implementing an extent query for separate layers would be
much more difficult to program. You are right that WMS and WCS will give
back the extent via a GetCapabilities request, but that is exactly the
thing that I would like to do with native MapServer. I just want to be
able, before I request the actual map, to get its extents via a separate
call. AFAICS the problem is not so much implementing this functionality
(it's already there for WMS and friends), but to agree how to send back
the results (XML, GeoJSON, etc)
Jan
Frank Warmerdam wrote:
Jan Hartmann wrote:
I second that question. If not, could it be implemented? Very useful
feature
Jan
Bob Basques wrote:
All,
Is there any way to get a dataset extents from MapServer CGI directly
(no Mapscript)?
Jan / Bob,
How would you see this working? Would it be a request made against a
particular layer? Against the map as a whole? Internally in the code we
have:
int msLayerGetExtent(layerObj *layer, rectObj *extent)
which calls the data source specific GetExtent function. But I don't think
this works for raster layers. There is also msOWSGetLayerExtent() which
first consults the layer metadata for extents. Perhaps this would be the
logical place to look?
Well, I suppose the other side of this is that for WMS and WCS the layer
and coverage descriptions include extents already. Is that sufficient for
your needs?
Best regards,
