problem with MapServer global projection

[John Daly]

Percy,

Thanks, and yes, I was confused about how the source data gets reprojected 
to the definition of the output (or global) projection.  I got it going now.

John

----- Original Message ----- 
From: "percy" <percyd at PDX.EDU>
To: <MAPSERVER-USERS at LISTS.UMN.EDU>
Sent: Monday, November 20, 2006 1:16 PM
Subject: Re: [UMN_MAPSERVER-USERS] problem with MapServer global projection


> Hi John,
> Do you have a Projection object defined in your Layer object, too?
>
> You probably need something like:
>   projection
>      "init=epsg:4326"
>   end
> If you are using DD...
>
> MS needs to know what coordinate system your data is in before it can
> reproject it.
> Percy
>
> John Daly wrote:
>> All,
>>
>> I'm a new MapServer user and list member, and I'd like to say hello to 
>> everyone.  I'm also running into a problem trying to create a global map 
>> projection, and I would appreciate any and all feedback. I'm trying to 
>> use the projection example in Web Mapping illustrated, but although I 
>> have Proj4 support compiled in to MS, it does not seem to be actually 
>> using the new units and projection defined in my global.map file:
>>
>> MAP
>>   CONFIG "PROJ_LIB" "/usr/local/share/proj"
>>   PROJECTION
>>      "init=epsg:42304"
>>   END
>> #  PROJECTION
>> #     "proj=lcc"
>> #     "ellps=GRS80"
>> #     "lat_0=49"
>> #     "lon_0=-95"
>> #     "lat_1=49"
>> #     "lat_2=77"
>> #     "datum=NAD83"
>> #     "units=m"
>> #     "no_defs"
>> #  END
>>
>> I've tried both approaches, and neither works.  The verbose switch to 
>> MapServer prints out:
>> .
>> ./cgi-bin/mapserv -v
>> MapServer version 4.10.0 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP 
>> OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER 
>> SUPPORTS=GEOS INPUT=EPPL7 INPUT=JPEG INPUT=POSTGIS INPUT=SHAPEFILE
>>
>> ...and i'm using version 4.5 of Proj4.  both were compiled from source on 
>> RedHat 9
>>
>> I do not getting any actual error message, just a failure to correctly 
>> use the new projection.  Has anyone run across this?  Is there an easy 
>> way to test if my proj4 support is not configured correctly?
>>
>> Thanks,
>>
>> John
>>
>
> -- 
> David Percy
> Geospatial Data Manager
> Geology Department
> Portland State University
> http://gisgeek.pdx.edu
> 503-725-3373