Thanks, Guillaume! I've decided to implement a small slant on what you
suggested. I'm going to modify my CGI to look for a "layers=layer_name"
parameter as part of an otherwise normal GetCapabilities request, as in:
mapserver.pl?service=WMS&request=GetCapabilities&layers=layer_name1,layer_name2
But otherwise it will do as you suggest: strip the specified layer(s)
from the larger GetCapabilities request and pass this along to the end
user so that only these layers are presented. I wish that the WMS spec
had provided this capability to begin with! Maybe a good idea for the
next release from OGC (1.1.2?)...
Thanks again!
Cheers,
John Maurer
http://nsidc.org/data/atlas/
Guillaume Sueur wrote:
Your very welcome !
I can send you my own proxy function in Python if you want
regards,
Guillaume
John Maurer a écrit :
Hi Guillaume,
Thank you for your suggestion. I still think it's unfortunate there
isn't something built into the existing OGC specifications to handle
this sort of thing. I'm weighing my various options still and will
see what's best. Your suggestion seems like the most straightforward
to implement so far. I appreciate you spending the time to e-mail me!
Cheers,
John Maurer
Guillaume Sueur wrote:
Hi John,
Maybe you can also filter the getCapabilities on the server side :
make a wrapper which will get called by the client (for instance :
www.server.net/myOwnCapabilities?layer=layer_name&map=map.map
the wrapper will perform the standard getCapabilities on
http://localhost/cgi-bin/mapserv and then manipulate the XML doc to
erase all the layers nodes not requested by the user.
If it suits your need, you can go this way.
Hope that helps
Guillaume
John Maurer a écrit :
Hi mapserver-users,
What is the best way to provide a generic/flexible WMS-related URL
for a specific layer within my MapServer mapfile? I want to include
this kind of thing in our DIF & FGDC metadata so that users know
about a WMS for a given data set. If I provide a GetCapabilities
request, this advertises *all* of the layers in my mapfile, which
represent a collection of multiple data sets, most of which will be
unrelated to the data set in the metadata. On the other hand, if I
provide a GetMap request this allows me to specify the layer
intended for a particular data set, but it limits the output
possibilities to a specific srs, format, width, height, and bbox. A
GetCapabilities for a specific layer would be akin to what I need,
but I don't think that's how it works. This is my quandary and I'm
hoping somebody has a solution to this kind of thing??
Thanks!
Cheers,
John Maurer
--
John Maurer
Web/Database Applications Engineer
National Snow and Ice Data Center (NSIDC)
University of Colorado at Boulder
http://cires.colorado.edu/~maurerj
------------------------------------
"Without geography, you're nowhere!"
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