[mapserver-users] Projection Woes?

[Ed McNierney]

Dave -

If you're putting that PROJECTION block in each of your LAYER objects,
then you're telling MapServer that each layer's data is in the exact
same projection as the output, and therefore MapServer decides that
there's no reprojection to be done!

If the data for the LAYER objects is in unprojected decimal degrees, the
projection block for each LAYER should be:

PROJECTION
	"proj=latlong"
	"ellps=GRS80"
END

That way MapServer knows that the INPUT is in decimal degrees and the
OUTPUT is in LCC so there's some reprojecting to be done.

	- Ed

Ed McNierney
Chief Mapmaker
TopoZone.com
ed at topozone.com
(978) 251-4242

-----Original Message-----
From: Dave Howlett [mailto:davehowlett at sympatico.ca]
Sent: Saturday, December 29, 2001 1:57 PM
To: mapserver-users at lists.gis.umn.edu
Subject: [mapserver-users] Projection Woes?


I'm trying to reproject my data to a Lambert Conformal Conic projection.
The data is in a geographic coordinates projection (or non-projected).
There doesn't appear to be a lot of information online regarding
performing this task within MapServer unfortunately. If someone can
proof me wrong on that I'd greatly appreciate it :)

So far I have defined the projection which I desire in the Map Object
and each of the Layer Objects with:

PROJECTION
     "proj=lcc"
     "ellps=GRS80"
     "lat_0=49"
     "lon_0=-95"
     "lat_1=49"
     "lat_2=77"
END

Yet there is no difference in the display.

My units are in decimal degrees. Could this be the problem?

I'm running MapServer 3.5 with Proj.4 compiled on a Redhat box.

Please help me with my distorted views!!

Dave