[mapserver-users] Re: Projection Question

[Kieran J. Ames]

Thanks, Frank, for your help. The Mapserver version I'm using at this
time (can't get to it right now) is able to project the tif images I
have. The new data will be stand-alone and not try to combine the
Massachusetts tifs with the New York ones.

Once, I found a listing that told me UTM 1927 was refered to as
"clrk66". I can't seem to find that reference page again. I also found
out that the Massachusetts data I have is Massachusetts State Plane
1983, (Mainland - meters) and I can't figure out how to declare that in
the "proj=" portion.
Can someone make some kind of code-decode table available for the valid
values in "proj=" and "ellps="? 
TIA for any guidance or referals on this.
Kieran

-------- Original Message --------
From: Frank Warmerdam <warmerdam at pobox.com>
Subject: Re: [mapserver-users] Projection Question
To: "Kieran J. Ames" <kames at keyspanenergy.com>

"Kieran J. Ames" wrote:
> 
> Hi, list.
> I have a question about how to properly reference some tiff files.
> I currently have some tif files (Long Island, NY) that is NAD27. I use
> the following lines in my map file:
> PROJECTION
>  "proj=utm"
>  "ellps=clrk66"
>  "zone=18"
>  "north"
>  "no_defs"
> END
> Now, I have some new tif files for Massachusetts. They are in NAD83.
> What values would I use to properly get to them?

Kieran, 

The correct projection declaration for these would be similar, but with
"ellps=GRS80". 

Are you wanting to overlay these files?  Pre 3.5 MapServer can't
reproject
or datum shift rasters.

Best regards,

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I set the clouds in motion - turn up   | Frank Warmerdam,
warmerdam at pobox.com
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and watch the world go round - Rush    | Geospatial Programmer for Rent