Hi Jukka,
Many thanks for the suggestion however we've decided to take another route -
which basically entails publishing a OGC standards compliant Mapserver WMS
alongside a WMTS enabled Tilecache service.
Cheers
Andrew
-Original Message-
From: Rahkonen Jukka [mailto:jukka.rahko...@mmmtike.fi]
Sent: Friday, 6 May 2011 4:10 p.m.
To: Andrew Cowie; mapserver-users@lists.osgeo.org
Subject: Re: [mapserver-users] Mapserver as a WMS Client - problems working
with a 'remote' Tilecache service
Hi,
I have never tried myself but I would guess that you need to prepare a xml file
for defining a gdal-wms datasource and refer to that xml file in your mapfile.
Read http://gdal.org/frmt_wms.html
-Jukka Rahkonen-
Andrew Cowie wrote:
Hello List,
We are currently setting up a cascading WMS using Mapserver as a client to
request maps from another Mapserver and from a Tilecache. We have read that
Mapserver can be configured to do this but we are running into problems when
using Mapserver as a client to Tlecache. Specifically, how do we publish
metadata in the MapSever Client capabilities document about the correct
resolutions / bounding box of a Tilecache service.
More details...
Here's a snippet of our 'top level' Mapserver mapfile, which will sit on our
public server:
LAYER
NAME 'lcr_basemap_cache_wgs84'
TYPE RASTER
CONNECTIONTYPE WMS
CONNECTION http://ourserver/tilecache/wms-c/tilecache.py?;
PROCESSING CLOSE_CONNECTION=DEFER
METADATA
wms_name lcr_basemap_cache_wgs84
wms_title Baselayer - Cached
wms_server_version1.1.1
wms_formatimage/png
wms_srs EPSG:4326
wms_extent165 -48 179.5 -33
wms_abstract Cached via Tilcache
END
END
This pulls a layer from our Tilecache (a snippet from our tilecache config
file):
[lcr_basemap_cache_wgs84]
type=WMSLayer
layers=coastpoly,veg,urban_grp,contours,water,coast_feats,height_pnts,tracks,rail,all_roads,railway_station,text
srs=EPSG:4326
bbox=165,-48,179.5,-33
resolutions=0.025398253504337,0.012699126752168,0.006349563376084,0.003174781688042,0.001587390844021,0.000793695422011,0.000317478168804,0.000158739084402,0.79369542201,0.31747816880,0.15873908440,0.06349563376,0.03174781688
url=http://ourserver/cgi-bin/mapserv?map=/path/to/ourmapfile.maptransparent=true;
extent_type=loose
metaBuffer=10
metasize=6,6
metaTile=true
(As you can see, Tilecache is pointing to another Mapserver which generates the
maps.)
We have had some success in connecting to the Tilecache via the Mapserver
Client using an Openlayers client to view the 'top level' WMS layers ** BUT **
this only works because we configured Openlayers to use the correct resolutions
/ bounding box etc. What we are really trying to achieve with this is a public
WMS for which other people/clients can use, e.g. Openlayers / QGIS, by just
reading the Capabilities document provided by the MapServer client.
So far, we have yet to find a way to advertise (via the capabilities document)
these underlying Tilecache resolutions as metadata in the cascading level
Mapserver. Is this possible?
If it is not possible, does anybody have recommendations as to how to go about
this in a standards compliant way?
Many thanks,
Andy
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