[GRASS-user] problems using r.proj with large data set

[JerryNelson]

Further to this message.

I did a cvs update and compiled the result with --enable-largefile option.
The make process worked ok and it is possible that the r.proj ran a bit
longer before it crashed with the message Killed but it still died. 

Is this a problem with large files that I will just have to work around or
is it something to do with my setup?

Any help appreciated. 

Thanks, Jerry


JerryNelson wrote:
> 
> I am working with SRTM elevation for the Horn of Africa. The data comes in
> chunks, which I have patched together to cover all the countries I'm
> interested in (South to Uganda and west to Ethiopia). The data are
> originally in lat-long but I want to calculate slope so my understanding
> is
> that I need to project. I choose utm 37N as being roughly in the center of
> the region and then extend the bounds of the working region to include all
> the countries. 
> 
>  
> 
> I'm using grass63 that I compiled on a machine running CentOS, which is a
> version of Redhat. The machine has 2 gb of memory. The command runs for
> awhile and then stops, sometimes with a complain about memory or sometimes
> with the word Killed. Any suggestions greatly appreciated!
> 
>  
> 
> Jerry
> 
>  
> 
> r.proj input=AfricaHornElev location=world mapset=PERMANENT
> output=AfricaHornElev method=cubic 
> 
>  
> 
> Input Projection Parameters: +proj=longlat +a=6378137 +rf=298.257223563
> +no_defs Input Unit Factor: 1
> 
>  
> 
> Output Projection Parameters: +proj=utm +zone=37 +a=6378137
> +rf=298.257223563 +n o_defs Output Unit Factor: 1
> 
> Input:
> 
> Cols:   25128 (25200)
> 
> Rows:   24696 (27600)
> 
> North: 15.580000 (18.000000)
> 
> South: -5.000000 (-5.000000)
> 
> West:  31.000000 (31.000000)
> 
> East:  51.940000 (52.000000)
> 
> ew-res: 0.000833
> 
> ns-res: 0.000833
> 
>  
> 
> Output:
> 
> Cols:   19262 (20328)
> 
> Rows:   19223 (19507)
> 
> North: 1722315.000000 (1722315.000000)
> 
> South: -566189.703183 (-600000.000000)
> 
> West:  -393095.238095 (-520000.000000)
> 
> East:  1900000.000000 (1900000.000000)
> 
> ew-res: 119.047619
> 
> ns-res: 119.050341
> 
> Allocating memory and reading input map...
> 
> 
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