[GRASS5] error encountered in r.terraflow

[abhay menon]

Hello Shaun, Andrew and the list,

To Shaun:
yes I do have space...on the system there is about 44.5gb of free space
where as the *ESRI Ascii Raster grid* of size 960mb required 22.62gb as said
by the program.

>r.terraflow, it requires 80N where N is rows x columns of space to
>compute the output. This can be upwards of 40G for large rasters
Is that the Grass Ascii Raster Grid that you are talking about??.

To Andrew:
yes i do manually delete those files in /var/tmp each time when
r.terraflowfails.( already warned about the same each time terraflow
runs ).

Shaun's patch did successed in removing the problem with ami_stream.h for
the purpose of AMI_STREAM.

but i want to know from Shuan which version of the cvs build did you use, on
which your patch work and  where able to get the desired results on larger
files..

--
Best Regrads

Abhay Menon

On 4/28/06, Shaun Walbridge <walbridge at nceas.ucsb.edu> wrote:
>
> Do you have an large amount of disk space available on your /var
> partition? The error:
> file=/var/tmp/STREAM_UpisEN:cannot read!: Input/output error
> indicates you'd run out of space. As mentioned in the help for
> r.terraflow, it requires 80N where N is rows x columns of space to
> compute the output. This can be upwards of 40G for large rasters.
>
> cheers,
> Shaun
>
> abhay menon wrote:
>
> > hello all,
> >
> > am still facing this problem.... even after updating the patch file..
> >
> > r.terraflow December 2003
> > region size is 13593 x 15215
> > cell 960MBdata header compatible with region header
> > elevation stored as FLOAT (4B) WARNING: raster 960MBdata is of type
> > CELL_TYPE --you should use r.terraflow.short
> > STREAM temporary files in /var/tmp  (THESE INTERMEDIATE STREAMS WILL
> > NOT BE DELETED IN CASE OF ABNORMAL TERMINATION OF THE PROGRAM. TO SAVE
> > SPACE PLEASE DELETE THESE FILES MANUALLY!)
> > SFD (D8) flow direction
> > D8CUT=999999986991104.000000
> > memory size: 400.00M (419430400) bytes
> > Memory manager registering memory in MM_WARN_ON_MEMORY_EXCEEDED mode.
> > reading data from 960MBdata to stream /var/tmp/STREAM_kohqGU:
> > total elements=206817495, nodata elements=50042031
> > largest temporary files:
> >    FILL: 10.79G (11581779720) [206817495 elements, 56B each]
> >    FLOW: 11.68G (12542037120) [156775464 elements, 80B each]
> > Will need at least 23.36G (25084074240) space available in /var/tmp
> > ------------------------------
> > COMPUTING FLOW DIRECTIONS
> > classifying nodata (inner & boundary)
> > finding nodata
> > relabeling nodata
> > MM warning: limit=419430400B. allocating 209608296B.  limit exceeded
> > by 23602B.
> > MM warning: limit=419430400B. allocating 209608296B.  limit exceeded
> > by 23633B.
> > merging relabeled grid
> > MM warning: limit=419430400B. allocating 209567256B.  limit exceeded
> > by 23558B.
> > MM warning: limit=419430400B. allocating 209567256B.  limit exceeded
> > by 23589B.
> > ----------
> > assigning preliminary directions
> > ----------
> > finding flat areas (plateaus and depressions)
> > plateau.cc:starting memscan
> > plateau.cc:memscan done
> > removing duplicate plateaus
> > MM warning: limit=419430400B. allocating 209567260B.  limit exceeded
> > by 23574B.
> > :
> > MM warning: limit=419430400B. allocating 209567260B.  limit exceeded
> > by 23636B.
> > relabeling plateaus
> > MM warning: limit=419430400B. allocating 209567260B.  limit exceeded
> > by 23570B.
> > MM warning: limit=419430400B. allocating 209567260B.  limit exceeded
> > by 23601B.
> > generating plateau statistics
> > MM warning: limit=419430400B. allocating 209403100B.  limit exceeded
> > by 23570B.
> > MM warning: limit=419430400B. allocating 209403100B.  limit exceeded
> > by 23601B.
> > ----------
> > assigning directions on plateaus
> > MM warning: limit=419430400B. allocating 209649312B.  limit exceeded
> > by 19306B.
> > :
> > MM warning: limit=419430400B. allocating 209649312B.  limit exceeded
> > by 19368B.
> > --------------
> > generating watersheds and watershed graph
> > creating windows
> > warning: using slower scan
> > generateWatersheds
> > MM warning: limit=419430400B. allocating 209628776B.  limit exceeded
> > by 10438B.
> > :
> > :
> > :
> > :
> > :
> > MM warning: limit=419430400B. allocating 209628776B.  limit exceeded
> > by 11182B.
> > file=/var/tmp/STREAM_UpisEN:cannot read!: Input/output error
> > r.terraflow: ./IOStream/include/ami_sort_impl.h:109: void
> > makeRun_Block(AMI_STREAM<T>*, T*, unsigned int, Compare*) [with T =
> > waterWindowType, Compare = priorityCmpWaterWindowType]: Assertion `err
> > == AMI_ERROR_NO_ERROR' failed.
> >
> > --
> > Best Regrads
> >
> > Abhay Menon
> >
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