Maybe you could attach your entire .map file for the mailing list to
see.
---
Jeff McKenna
FOSS4G Consulting and Training Services
http://www.gatewaygeomatics.com/
On 9-Jun-08, at 4:44 PM, Matthew Pettis wrote:
Hi Barend, All,
I tried your suggested changes:
====================================================
...
PROJECTION
"init=epsg:4326"
END
####################
# Web settings
####################
WEB
IMAGEPATH "C:/ms4w/Apache/htdocs/tmp/"
IMAGEURL "/tmp/"
METADATA
"wms_title" "WMS Demo Server"
"wms_onlineresource"
"http://localhost/cgi-bin/mapserv.exe?center=45,-95&zoom=6";
"wms_srs" "EPSG:4326 EPSG:26915"
END
END
####################
# State
# Background shows through missing precincts to show where no
votes will be coming from
####################
LAYER
NAME "state"
METADATA
"wms_title" "state"
"wms_format" "image/png"
END
...
====================================================
Now, the map is blank (no error messages either). It looks like i can
drag and zoom per the controls, but there is no image of the state of
MN to move around. Any idea what could still be the matter?
Thanks,
Matt
On Sun, Jun 8, 2008 at 1:08 PM, Barend Kobben <[EMAIL PROTECTED]> wrote:
It looks like your datastore's SRS is 4326 (latlon on the WGS84).
In other
words, the data in your shapefile, database or raster image are (or
are
advertised to be) in 4326. Its because your data is indeed in that
srs
and/or advertised as such in the Mapfile LAYER as
PROJECTION
"init=epsg:4326"
END
But you tell the WMS interface that the layer is in 26915, by
setting layer
metadata srs => EPSG:26915
If you want MS to reproject your data from 4326 to 26915 upon
request, make
sure you set the layerdata projection:
PROJECTION
"init=epsg:4326"
END
Then make sure you tell the WMS interface to advertise it can be
reprojected
to 26915 by setting it in web metadata srs:
"wms_srs" "EPSG:4326 EPSG:26915 EPSG:[others you want to offer]"
AFAIK there no wms_srs metadata in the LAYER object...
--
Barend Köbben
International Institute for Geo-Information
Sciences and Earth Observation (ITC)
PO Box 6
7500AA Enschede, The Netherlands
+31 (0)53 4874253
On 08-06-08 02:21, "Matthew Pettis" <[EMAIL PROTECTED]> wrote:
Hi,
I am not a GIS guy, and am a bit confused by the projection
attributes
i have to specify in mapserver. In particular, I have a simple
example. I have a map that has the following metadata:
Horizontal Coordinate Scheme UTM
Ellipsoid GRS80
Horizontal Datum NAD83
Horizontal Units Meters
UTM Zone Number 15
I believe this translates to an epsg=26915
Now, according to mapserver, I have to specify a projection
object, a
web metadata srs, and a layer metadata srs.
To compress the mapfile, i'll just note what i have specified for
each
of these settings.
First, I would think that this would work:
projection => init=epsg:26915
web metadata srs => EPSG:26915
layer metadata srs => EPSG:26915
this give me the error:
msWMSLoadGetMapParams(): WMS Server Error. Invalid SRS given. SRS
must be valid for all requested layers.
I only have the one layer (it's of the state of MN from www.gis.leg.mn
).
However, the following renders, but I don't think it is the
projection
i want (as the top of MN is too wide):
projection => init=epsg:26915
web metadata srs => EPSG:26915
layer metadata srs => EPSG:4326
Now, I am using mapserver as a WMS. Before I was using it NOT as a
WMS, but just making it render the shapefile without any projection
information, it worked, and it was the projection I had come to
expect
when seeing the state of MN rendered.
Why does my first configuration give me an error?
How can I make it render in the way I expect without giving
mapserver
explicit projection instructions?
please forgive the ignorance of map projection knowledge.
thanks,
matt
International Institute for Geo-Information Science and Earth
Observation (ITC)
Chamber of Commerce: 410 27 560
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