[Mapserver-users] WMS layer alignment
Brian Johnson
spiff88gis at hotmail.com
Wed Sep 17 07:37:16 PDT 2003
I have a map file that uses a couple of WMS servers to add some nice images
to my map. Specifically, I added the Terraserver orthos - and a relatively
new server from the USGS - color orthos for many urban areas.
My map file, the Terraserver WMS layer, and the shapefiles I am using are in
NAD83 UTM zone 10N coordinate system. The USGS WMS layer is in WGS 84. All
projections are set in the map file, and for each layer. When I turn on the
Terraserver layer, the image is nicely displayed behind the shapefiles
perfectly. When I turn on the USGS layer, the center of the image is
perfectly aligned - and the rest of the image appears to be squashed - with
apparently a larger Y-axis extent that the image should be. If I change the
map projection to WGS 84, the the USGS layer now nicely aligns with the
shapefiles, and so does the Terraserver image - with no reprojection
problem.
Any suggestions as to where my problem might be? I'd like to have the map
in UTM project for how it looks compared to WGS - but I can't figure out why
the WGS 84 layer is not reprojecting correctly.
Below are the sections from my .map file...
Thanks for any ideas!
Brian
#---Map file projection info---
PROJECTION
"init=epsg:26910"
END
#---Terraserver Layer---
LAYER
NAME ortho
METADATA
"wms_title" "USGS Digital Ortho-Quadrangles"
"wms_srs" "EPSG:26910" #NAD83 UTM zone 10N
LYRNAME "DOQs (orthophotos)"
LINK
"http://terraserver.microsoft.com/about.aspx?n=AboutTerraServiceOverview"
END
GROUP "BASE DATA"
STATUS OFF
TYPE RASTER
MINSCALE 10
MAXSCALE 240000
CONNECTIONTYPE WMS
CONNECTION
"http://terraservice.net/ogcmap.ashx?VERSION=1.1.1&SERVICE=wms&LAYERS=DOQ&FORMAT=png&styles="
PROJECTION
"init=epsg:26910" #NAD83 UTM zone 10N
END
END
#---USGS Portland, OR area layer---
LAYER
NAME Urban133
METADATA
"wms_title" "Portland Ortho 2002"
"wms_extent" "-123.12987 45.241726 -122.3584 45.75648"
LYRNAME "Urban133"
LINK "N/A"
END
OFFSITE 255 255 255
GROUP "Urban133"
STATUS ON
TYPE RASTER
CONNECTIONTYPE WMS
CONNECTION
"http://gisdata.usgs.net:80/servlet/com.esri.wms.Esrimap?SERVICENAME=133urban&VERSION=1.0.0&REQUEST=map&LAYERS=UA_ORTHO_313_01&STYLES=&FORMAT=JPEG&"
PROJECTION
"init=epsg:4326" #WGS 84
END
END
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