Hi Paul,
here the infos that you asked me for:
"WARNING: No projection name! Projection parameters likely to be
meaningless.
That is of much more concern. Can you try running
gdalinfo filename.tif
on the file that has the problem, and posting the results to the list
here in the hope that someone can see what is wrong?
here the output
GRASS 6.2.2 (BelcherBathy):~/Work/Devon-Data/bthy > gdalinfo
00005latlong.tif
Driver: GTiff/GeoTIFF
Size is 15134, 2496
Coordinate System is:
PROJCS["unnamed",
GEOGCS["unnamed",
DATUM["unknown",
SPHEROID["unretrievable - using WGS84",6378137,298.257223563]],
PRIMEM["Greenwich",0],
UNIT[,0.0174532925199433]],
UNIT["unknown",1]]
Origin = (-81.327157999999997,75.767208999999994)
Pixel Size = (0.000049996696181,-0.000049979967949)
Image Structure Metadata:
COMPRESSION=LZW
Corner Coordinates:
Upper Left ( -81.3271580, 75.7672090)
Lower Left ( -81.3271580, 75.6424590)
Upper Right ( -80.5705080, 75.7672090)
Lower Right ( -80.5705080, 75.6424590)
Center ( -80.9488330, 75.7048340)
Band 1 Block=15134x1 Type=Byte, ColorInterp=Red
Band 2 Block=15134x1 Type=Byte, ColorInterp=Green
Band 3 Block=15134x1 Type=Byte, ColorInterp=Blue
Band 4 Block=15134x1 Type=Byte, ColorInterp=Alpha
in fact, this is the same data as the following one, only transformed to
LatLong by ArcGIS
GRASS 6.2.2 (BelcherBathy):~/Work/Devon-Data/bthy > gdalinfo 00005_utm.tif
Driver: GTiff/GeoTIFF
Size is 14805, 2508
Coordinate System is:
PROJCS["WGS 84 / UTM zone 17N",
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.2572235630016,
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",-81],
PARAMETER["scale_factor",0.9996],
PARAMETER["false_easting",500000],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]],
AUTHORITY["EPSG","32617"]]
Origin = (490944.258245616627391,8409263.051821239292622)
Pixel Size = (1.414845022256486,-5.571261774748564)
Metadata:
AREA_OR_POINT=Area
TIFFTAG_SOFTWARE=IMAGINE TIFF Support
Copyright 1991 - 1999 by ERDAS, Inc. All Rights Reserved
@(#)$RCSfile: etif.c $ $Revision: 1.9.1.3 $ $Date: 2002/07/29 15:39:06EDT $
TIFFTAG_XRESOLUTION=1
TIFFTAG_YRESOLUTION=1
TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
Image Structure Metadata:
COMPRESSION=LZW
Corner Coordinates:
Upper Left ( 490944.258, 8409263.052)
Lower Left ( 490944.258, 8395290.327)
Upper Right ( 511891.039, 8409263.052)
Lower Right ( 511891.039, 8395290.327)
Center ( 501417.649, 8402276.690)
Band 1 Block=14805x1 Type=Byte, ColorInterp=Red
Band 2 Block=14805x1 Type=Byte, ColorInterp=Green
Band 3 Block=14805x1 Type=Byte, ColorInterp=Blue
Band 4 Block=14805x1 Type=Byte, ColorInterp=Undefined
and from the following file I got this error message
"WARNING: No projection name! Projection parameters likely to be
meaningless.
A datum name nad83 (North_American_Datum_1983) was specified without
transformation parameters. "
And even if I can open the file, I can't for example project it to
LongLat, everytime I get error messages about this transformation
parameter. I suppose the problem is the "unnamed" in the PROJCS, but how
could I fill it and with what?
This file is orignially a img file that I can open without problems with
ArcGIS, but grass says
"GDALOpen failed - 4
`oa16787_058.img' not recognised as a supported file format."
so I converted it to tif by img2tif
GRASS 6.2.2 (BelcherBathy):~/Work/Devon-Data/new > gdalinfo oa16787_058.tif
Driver: GTiff/GeoTIFF
Size is 2357, 2264
Coordinate System is:
PROJCS["unnamed",
GEOGCS["NAD83",
DATUM["North_American_Datum_1983",
SPHEROID["unnamed",6378137,298.2572220960423],
AUTHORITY["EPSG","6269"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4269"]],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]],
AUTHORITY["EPSG","26817"]]
Origin = (489494.411800000001676,8397247.058800000697374)
Pixel Size = (5.000000000000000,-5.000000000000000)
Metadata:
AREA_OR_POINT=Area
Corner Coordinates:
Upper Left ( 489494.412, 8397247.059)
Lower Left ( 489494.412, 8385927.059)
Upper Right ( 501279.412, 8397247.059)
Lower Right ( 501279.412, 8385927.059)
Center ( 495386.912, 8391587.059)
Band 1 Block=64x64 Type=Byte, ColorInterp=Gray
Thanks for all good ideas!
Martina
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