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Re: [udig-users] Re: projection not supported: +proj=utm +ellps=intl +zone=29 +towgs84=-84,-107,-120
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> Concerning the projection, maybe it's a problem with the raster I converted
> from an image with gcp's. When importing it into grass (not jgrass) it
> doesn't import it as a sinlge raster but as three different files (red,
> green and blue).
Yes, this is GRASS's normal approach to color based images. GRASS
deales interrnally with one band rasters, supposing you want to do
something with the numbers.
If you want to get one map out of it, I think you do a command called
r.composite, supplying the three channel files and it will make one
out of it.
> udig does project it correctly when warped to WGS84. I'll
> have to explore this more....
Let us know what you find. This seems a bit strange to me. The only
thing I can think of, is that internally the file has a projection
info, which is different from your proj file.
Perhaps you could check with gdalinfo for the inner projection.
Ciao
Andrea
>
> On Fri, Apr 3, 2009 at 9:05 PM, erik <whatevar89@xxxxxxxxx> wrote:
>>
>> Hi, I built a raster from an OziExplorer file with the following
>> projection:
>>
>> +proj=utm +ellps=intl +zone=29 +towgs84=-84,-107,-120
>>
>> WKT:
>>
>> PROJCS["UTM Zone 29, Northern Hemisphere",
>> GEOGCS["International 1909 (Hayford)",
>> DATUM["unknown",
>> SPHEROID["unnamed",6378388,297.000000000005]],
>> PRIMEM["Greenwich",0],
>> UNIT["degree",0.0174532925199433]],
>> PROJECTION["Transverse_Mercator"],
>> PARAMETER["latitude_of_origin",0],
>> PARAMETER["central_meridian",-9],
>> PARAMETER["scale_factor",0.9996],
>> PARAMETER["false_easting",500000],
>> PARAMETER["false_northing",0],
>> UNIT["metre",1,
>> AUTHORITY["EPSG","9001"]]]
>>
>> When I convert it to WGS84, it reads it. When I try to set it to ED50 zone
>> 29, it doesn't accept it read it either. RenderingNull
>>
>> PROJCS["ED50 / UTM zone 29N",
>> GEOGCS["ED50",
>> DATUM["European_Datum_1950",
>> SPHEROID["International 1924", 6378388.0, 297.0,
>> AUTHORITY["EPSG","7022"]],
>> AUTHORITY["EPSG","6230"]],
>> PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]],
>> UNIT["degree", 0.017453292519943295],
>> AXIS["Lon", EAST],
>> AXIS["Lat", NORTH],
>> AUTHORITY["EPSG","4230"]],
>> PROJECTION["Transverse_Mercator"],
>> PARAMETER["central_meridian", -9.0],
>> PARAMETER["latitude_of_origin", 0.0],
>> PARAMETER["scale_factor", 0.9996],
>> PARAMETER["false_easting", 500000.0],
>> PARAMETER["false_northing", 0.0],
>> UNIT["m", 1.0],
>> AXIS["x", EAST],
>> AXIS["y", NORTH],
>> AUTHORITY["EPSG","23029"]]
>>
>> Any suggestions?
>> Many thanks,
>> Erik
>
>
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