I cannot find the answer to my specific problem through the existing threads, nor can I properly search the GRASS list archives (that's another issue, but when I click one of my search results, a DIFFERENT message shows up unrelated to the link I clicked).
Here is my problem. I have a few e00 rasters from ArcGIS. When I view them in ArcMap, everything is fine. When I import using GRASS, with avcimport and e00conv installed, the maps display properly (I can see the different categories, etc.). However, the z value is simply a *. So when I query the file in a monitor, I get UTM-X | UTM-Y | *
Clearly, this is not the intended outcome! I do not get errors during the import, and I have tried exporting the e00 in different formats from ArcCatalog, and wondered if I should be converting my files to a different format instead of dealing with ESRI e00?
The other thing I attempted is to convert the e00 to an ASCII file in ArcInfo, then to import the ESRI ASCII in GRASS. Again, same result as above.
Am I having projection issues? Do I need to first import the e00/ASCII to a mapset with the same projection settings as the original e00, then re-project, or is this unrelated? I think I had tried that already, with the same result as above, but am willing to try again if need be.
What other conversion options may work from within Arc?
Here is my problem. I have a few e00 rasters from ArcGIS. When I view
them in ArcMap, everything is fine. When I import using GRASS, with
avcimport and e00conv installed, the maps display properly (I can see
the different categories, etc.). However, the z value is simply a *.
So when I query the file in a monitor, I get UTM-X | UTM-Y | *
The * value is for NULL data. Is there any region clipping occurring or MASK applied? Someone else may be able to intelligently speak to the issue of data displaying ok (colors/categories) but having a NULL data value. That I cant understand. Is your location setup properly, with broad enough extents to encompass the raster?
Clearly, this is not the intended outcome! I do not get errors during
the import, and I have tried exporting the e00 in different formats
from ArcCatalog, and wondered if I should be converting my files to a
different format instead of dealing with ESRI e00?
I had some issues with the e00’s. I cant recall specicifally. for best raster interoperability, I found the in Arc, you can export to raster to ASCII (.txt file by default) or export from GRASS as ASCII (*.txt), and use the conversion toolbox “from raster/to raster” to import export.
The other thing I attempted is to convert the e00 to an ASCII file in
ArcInfo, then to import the ESRI ASCII in GRASS. Again, same result
as above.
I’d stick with the ASCII grid file for interchanging.
Am I having projection issues? Do I need to first import the e00/
ASCII to a mapset with the same projection settings as the original
e00, then re-project, or is this unrelated? I think I had tried that
already, with the same result as above, but am willing to try again
if need be.
Is all your data in the same projection? What projection is your GRID/raster in, and what projection is your other data in?
What other conversion options may work from within Arc?
for rasters, I found the ASCII GRID format to be the best for importing/exporting data.