importing raster files from Idrisi4.0 for DOS
Houxiang Wang GEO Grad 96
wangh2 at gisserv20.geog.muohio.edu
Tue Jan 27 21:43:03 EST 1998
Dear GRASS users:
I am having troubles importing files from idrisi4 for DOS, and hereby securing
helps from you. I posted the same request two weeks ago, but have not got many
responses.
1. I exported idrisi4 files using ascii raster format. Then I edited the
files (deleting the first two lines of projection and zone, so there are six
lines in the header part). After ftp them to GRASS, I ran r.in.ascii to finally
get GRASS format raster files. Everything looked okay. However, when I tried to
display it using d.rast (and p.map), it was blank--three or four non-sense
colorful lines at the top, and elsewhere was just white. I checked the file
under cellhd directory. It reads:
proj: 1
zone: 16
north: 4386270
south: 4351770
east: 730110
west: 686490
cols: 1454
rows: 1150
e-w resol: 30
n-s resol: 30
format: 0
compressed: 1
Actually the file is of UTM 16, and it is within the current region. I am not
sure of the last sentence above. Does it mean that the file is compressed so
that GRASS could not process it correctly?
2. I also tried to export from idrisi using binary format, which produces two
directories--cell and cellhd, each of which contains one file of the same name.
In grass I then ran r.support to get a color table for it. However, this time it
was even worse--I couldn't get the file done.
I am stuck. Could someone give me some hints? Thanks a lot.
Houxiang
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