Successful importing raster files from Idrisi4.0 for DOS

[Javier Ferrer Polo]

----------
> De: Houxiang Wang GEO Grad 96 <wangh2 at gisserv20.geog.muohio.edu>
> A: grass at cecer.army.mil
> Asunto: Successful importing raster files from Idrisi4.0 for DOS
> Fecha: jueves 5 de febrero de 1998 17:46
> 
> To whom it may concern:
> 
> Weeks ago I post a message about importing idrisi image files to GRASS. I
got 
> little response. After going thru the whole procedure with defferent
idrisi 
> settings, I now have successfully imported the files to GRASS.
> 
> The trick of Idrisi is that the image file you are going to export must
be 
> itself in Integer Ascii format, not byte packed binary. so we have to use

> CONVERT function to convert the idrisi image file to integer ascii
format, if 
> not already that. Then use Import/export to export this image file to
GRASS in 
> ascii format. FTP this new file to your GRASS directory, run r.in.ascii, 
> everything by now should work properly.
> 
> I think somebody may need this kind of informatin in future. So I post
this to 
> the list. thanks,
> 
> Houxiang
> 
> > From wangh2 at gisserv20.geog.muohio.edu Wed Jan 28 02:05:18 1998
> > X-Authentication-Warning: isis.cecer.army.mil: listserv set sender to
grass 
> using -f
> > Date: Tue, 27 Jan 1998 21:43:03 -0500
> > From: wangh2 at gisserv20.geog.muohio.edu (Houxiang Wang GEO Grad 96)
> > To: grass at cecer.army.mil
> > Subject: importing raster files from Idrisi4.0 for DOS
> > Mime-Version: 1.0
> > Content-Transfer-Encoding: 7bit
> > Content-MD5: j/EpKlRqCX+9rjbiwT9TDQ==
> > 
> > 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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