[GRASS-windows] Large file support?

[Doug_Newcomb at fws.gov]

Jonathan,
      I didn't use r.in.gdal, but I did sucessfully import a 32 GB ascii
text file via r.in.xyz on 32 bit GRASS for windows.  Granted, it did take a
bit over 8 hours, but it was successful.

Doug

Doug Newcomb
USFWS
Raleigh, NC
919-856-4520 ext. 14 doug_newcomb at fws.gov
---------------------------------------------------------------------------------------------------------

The opinions I express are my own and are not representative of the
official policy of the U.S.Fish and Wildlife Service or Dept. of Interior.
Life is too short for undocumented, proprietary data formats.


                                                                           
             Jonathan                                                      
             Greenberg                                                     
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             org                       Re: [GRASS-windows] Large file      
                                       support?                            
                                                                           
             07/28/2008 04:24                                              
             PM                                                            
                                                                           
                                                                           
                                                                           




Marco (and GRASS'ers):

             Has anyone *successfully* imported a file > 4gb via r.in.gdal
into
GRASS for Windows (including looking at the file and do a v.what in the
lower portions of that image)?  Enabling the lfs flag I don't think is
the issue -- I think *grass* can deal with big files, but the GDAL
compile it is relying on probably isn't configured correctly.  I have
confirmed this on two different computers, importing two different files
(both are > 7gb) -- the import absolutely finished -- it failed on both
computers in the same place.  I gave it PLENTY of time (> 12 hours, it
imported in about 2 hours on a comparable unix box) and the r.in.gdal
"run" button returned to black (usually a good back-up indication that a
process is finished, if the progress bar isn't working).

--j

Marco Pasetti wrote:
> Hi Johnathan,
>
>> I seem to be running up against a file size limitation in the latest
>> version of grass for windows
>
> I made nothing different about that in the latest binary release fo
> Windows; I suppose it's a generic problem, not strictly related to the
> latest release
>
>> I'm trying to import a 7gb file and it seems to have imported only
>> about the first 2gb or so of the file, and the rest is just
>> empty/errored (when I do a v.what it gets a "can't read" in the lower
>> 2/3 or so of the image, but returns correct values in the upper 1/3 or
>> so of the image).  I used r.in.gdal to import the file (it was an ENVI
>> image file).  Ideas?
>
> Actually no, afraid.
> If you read here
>
http://grass.osgeo.org/grass63/binary/mswindows/native/README.html#Release%20Notes

> you can actually see that LFS is enabled.
> Are you sure that the command worked fine or finished to process data?
> sometimes the progress bar fails
> Please, try again launching the command within the text command line
> (msys or dos, as you prefer)
>
> Please report me the results.
>
> Regards,
>
> Marco
>

--

Jonathan A. Greenberg, PhD
Postdoctoral Scholar
Center for Spatial Technologies and Remote Sensing (CSTARS)
University of California, Davis
One Shields Avenue
The Barn, Room 250N
Davis, CA 95616
Cell: 415-794-5043
AIM: jgrn307, MSN: jgrn307 at hotmail.com, Gchat: jgrn307
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