[gdal-dev] gdal_translate for Lambert Conformal Conical

[Paul Spencer]

Gen,

is your png file already in the lcc projection and you are just trying  
to assign the projection to it?

Your first proj string looks suspicious to me, I suspect 90w should be  
-90 and 25n should be just 25

Your second proj string should use lower case 'epsg' - this is because  
epsg is actually the name of a proj dictionary and 9801 is the value  
to look up in that dictionary - the dictionary is in lower case and  
this is important on linux systems.

Cheers

Paul

On 26-Jun-08, at 1:17 PM, gen wrote:

> Hello,
>
> I'm trying to create a geotiff file from PNG map file which uses
> Lambert Conformal Conical coordinate system, and hitting a road block.
>
> $ gdal_translate -of GTiff -co INTERLEAVE=PIXEL -a_ullr 41.5569
> -121.9248 32.9250 -112.9434 -a_srs '+proj=llc +lon0=90w +lat_0=25n
> +lat_1=25n' test.png dest.tif
> Failed to process SRS definition: +proj=llc +lon0=90w +lat_0=25n
> +lat_1=25n
>
> $ gdal_translate -of GTiff -co INTERLEAVE=PIXEL -a_ullr 41.5569
> -121.9248 32.9250 -112.9434 -a_srs EPSG:9801 test.png dest.tif
> ERROR 6: EPSG PCS/GCS code 9801 not found in EPSG support files.  Is
> this a valid
> EPSG coordinate system?
> Failed to process SRS definition: EPSG:9801
>
> Any idea what I am missing?
>
> I downloaded gdal as part of FWTools package http://fwtools.maptools.org/
>
> Thanks in advance,
> -Gen
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