[seek-dev] implement XQuery in EcoGrid and SRB
vieglais at ku.edu
Wed Jun 11 11:29:20 PDT 2003
David Stockwell wrote:
> Matt, others.
> I'd like to bring OGC into the discussion. Would not the XML output of a
> GetCapabilities call
> in an OGC WMS be another metadata standard to incorporate?
> For interest Yang has implemented Dave's WMS client at
> on a couple of test layers. mgv0001 is coarse 0.167deg (~2MB) and
> hydro_dem is medium 0.01 deg (~2G)
> for speed comparisons.
> Now, do we need to install and input data into SRB to get the metadata
> It would be easier if the ecogrid infrastructure could just use the
> results of the GetCapabilities call.
> Also, other OGC: WMS sites could be registered in the ecogrid.
OGC WMS is a type of service, and hence an instance would likely be
registered in the ecogrid registry as a "WMS service" as opposed to an
"Ecogrid Query Service". The capabilities document in this case could
not be searched with the ecogrid query service since it does not expose
the query API.
In order to search the OGC capabilities with the current view of the
ecogrid query service design, it would be necessary to implement the
ecogrid query API as part of the OGC WMS service instance.
Alternatively, a metadata store such as morpho or srb could be used to
provide eml descriptions of the wms service (probably derived directly
from the output of getCapabilites).
There was some attempt a while back to get OGC service providers to
register their instances with UDDI, but for political reasons I think,
this did not eventuate (at least not with the public uddi registries).
Seems odd to me that it didn't fly, since it would be great to be able
to query a registry for a list of mapping services and build dynamic
maps on the fly. I suspect there may have been some contention with the
spatial data clearinghouse folks, but that's just a guess.
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