[Qgis-user] Assigning/warping projections

[Jean-Claude REPETTO]

Le Ven 1 juillet 2011 14:45, Lee Mueller a écrit :
>
> I was able to compile the utility in question. Unfortunately, after
> utilizing it I am doubting it is the answer to my question. At the very
> least I was able to confirm the ecw file contains projection data:
>
>>>> ecwhed WYANDOTTE_NE.ecw
> Datum = NAD83
> Projection = MICH_GEOREF
> Origin = (731867.577255, 192959.525684)
> Pixel Size = (1.000000, -1.000000)
> Corner Coordinates:
> Upper Left = (731867.577255, 192959.525684)
> Upper Right = (737276.577255, 192959.525684)
> Lower Left = (731867.577255, 185830.525684)
> Lower Right = (737276.577255, 185830.525684)
>
> Again, I utilized gdalwarp in an attempt to reproject this raster from
> Michigan Georef (EPSG:3078) to UTM Zone 17 (ESPG:26917).
> I receive the following error:
>
> ERROR 1: Unable to compute a transformation between pixel/line
> and georeferenced coordinates for
> /home/lee/documents/gis/detroit/aerial/WYANDOTTE_NE/WYANDOTTE_NE.ecw.
> There is no affine transformation and no GCPs

I think your problem is more related to GDAL than to QGIS. You should join
the GDAL mailing list. May be this discussion will help you :
<http://osgeo-org.1803224.n2.nabble.com/Michigan-GeoRef-Michigan-Oblique-Mercator-EPSG-3078-td6517423.html>

Jean-Claude