[mapserver-users] mapserver wms: srs problem
Matthew Pettis
matthew.pettis at gmail.com
Mon Jun 9 23:14:34 EDT 2008
Will do. Here it is below:
===================================================================
MAP
# http://localhost/cgi-bin/mapserv.exe?map=C:\ms4w\Apache\htdocs\ol\wms.map&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetCapabilities
# http://localhost/cgi-bin/mapserv.exe?map=C:\ms4w\Apache\htdocs\ol\wms.map&mode=map
################
# Map attributes
################
IMAGETYPE PNG
EXTENT 184056.505 4809728.25 767381.245 5478975.75
SIZE 660 495
IMAGECOLOR 255 255 255
FONTSET "C:/ms4w/Apache/htdocs/fonts/fonts.list"
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:4269 EPSG:4326"
# "wms_srs" "EPSG:26915"
"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"
PROJECTION
"init=epsg:4326"
END
METADATA
"wms_title" "state"
# "wms_srs" "EPSG:26915"
# "wms_srs" "EPSG:4326"
"wms_format" "image/png"
END
CONNECTIONTYPE postgis
CONNECTION "user=postgres dbname=gisvote password=postgres"
DATA "the_geom from shp_state"
STATUS default
TYPE polygon
CLASS
NAME "state"
COLOR 200 200 200
END
END # Layer state
END
===================================================================
On Mon, Jun 9, 2008 at 8:19 PM, Jeff McKenna
<jmckenna at gatewaygeomatics.com> wrote:
> 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 <kobben at itc.nl> 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" <matthew.pettis at gmail.com> 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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>>
>>
>>
>> --
>> It is from the wellspring of our despair and the places that we are
>> broken that we come to repair the world.
>> -- Murray Waas
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>
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--
It is from the wellspring of our despair and the places that we are
broken that we come to repair the world.
-- Murray Waas
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