[Mapserver-users] proj.4 stuff

[Frank Warmerdam]

Bob Basques wrote:
> Ok, that's cool, so that's in the GDAL stuff, interesting.  Learn 
> something everyday.  Although I didn't see any reference to it anywhere 
> in my searching.
> 
> So I took the above and made this Map File, is the correct way to 
> implement (it didn't work, I get a blank page still):

Bob,

I don't see much obvious in the way of problems here, but I would
mention that EPSG:26915 is in meters, not feet.  The definition looks
like:
   +proj=utm +zone=15 +ellps=GRS80 +datum=NAD83 +units=m +no_defs

You really need to verify that converting the bounds of your tlg_roads_l
file into from the declared source projection into the declared output
projection actually gives bounds that intersect your map EXTENT declaration.

Best regards,
> MAP
>  NAME 'test'
>  SIZE 800 650
>  STATUS ON
>  EXTENT 332000 -18000 678000 328000
>  UNITS FEET
> 
>  PROJECTION
>    "init=epsg:26915"
>  END
> 
>  LAYER
>    NAME 'tlg01'
>    DATA './data/tlg01/tlg_roads_l'
>    STATUS DEFAULT
>    TYPE LINE
> 
>    PROJECTION
>      "proj=lcc"
>      "lat_1=44.88333333333333"
>      "lat_2=45.13333333333333"
>      "lat_0=44.79111111111111"
>      "lon_0=-93.38333333333334"
>      "x_0=152400.3048"
>      "y_0=30480.06096"
>      "a=6378418.941"
>      "b=6357033.31"
>      "to_meter=0.3048006096012192"
>      "no_defs"
>    END
>  END
> 
> END ## end Map


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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