I recently was looking at a way of using GeoTIFF in AutoCAD 2015. I was looking at a way of specifying coordinate system using one of UTM projections. I didn't have much luck with that and I decided to try AutoCAD Map 3D 2017, there is an entire library of different coordinate systems including WGS84 UTM Zone 30N, the one I was interested in.
Now, let me explain my problem, I've got .tfw file that I generated using listgeo tool, here is the content of that file:
4.9995042276 0.0000000000 0.0000000000 -5.0003231419 -9782.7177138953 6572004.2399761314
I tried to use my GeoTIFF with ArcMap, QGIS and one more survey positioning package, all of them after specifying the right coordinate system place the GeoTIFF in the right geographical location apart from AutoCAD Map 3D.
When I specified the coordinate system and units in AutoCAD Map 3D, the entire GeoTIFF looks like it has been shifted a significant distance to the West.
I'm just wondering if AutoCAD Map 3D is drawing GeoTIFFs in a slightly different way or am I doing something completely wrong here?
Did anyone have any luck with using GeoTIFFs in Autodesk packages (Map 3d)? I'm worried that the .tfw file might have wrong values as in QGIS and that survey positioning package I didn't have to use that file and the software positioned GeoTIFF for me, when in AutoCAD Map 3D I actually have to place that file in the same directory as my GeoTIFF in order to be used but the x,y translation doesn't seem to be correct. Here is the output of gdalinfo:
Size is 3805, 3248 Coordinate System is: PROJCS["Transverse Mercator", GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich",0], UNIT["degree",0.0174532925199433], AUTHORITY["EPSG","4326"]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin",0], PARAMETER["central_meridian",-2.716666666666667], PARAMETER["scale_factor",1], PARAMETER["false_easting",0], PARAMETER["false_northing",0], UNIT["metre",1, AUTHORITY["EPSG","9001"]]] Origin = (-9785.217466009140500,6572006.740137700900000) Pixel Size = (4.999504227592880,-5.000323141986690) Metadata: AREA_OR_POINT=Area TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch) TIFFTAG_XRESOLUTION=127 TIFFTAG_YRESOLUTION=127 Image Structure Metadata: COMPRESSION=LZW INTERLEAVE=BAND Corner Coordinates: Upper Left ( -9785.217, 6572006.740) ( 2d53'17.62"W, 59d15'47.69"N) Lower Left ( -9785.217, 6555765.691) ( 2d53'15.00"W, 59d 7' 2.84"N) Upper Right ( 9237.896, 6572006.740) ( 2d33'16.92"W, 59d15'47.73"N) Lower Right ( 9237.896, 6555765.691) ( 2d33'19.40"W, 59d 7' 2.88"N) Center ( -273.661, 6563886.215) ( 2d43'17.24"W, 59d11'25.67"N)
@Jens When I used my file in QGIS I didn't use any extra world files, just the geotif itself, however when I tried to load my file in AutoCAD Map 3D I had to use tfw file as without it I was asked to specify the offsets for my geotif image.