[mapserver-users] Projection Woes?

[Dave Howlett]

Thanks Ed!

Makes sense and I believe I may have tried this way in my earlier attempts.
But, with the layers where I use:

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

... I can't find them in my displays. So I'm not out of the woods yet.

Dave

Ed McNierney wrote:

> 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