[GRASSLIST:1536] Re: DOQQ UTM to SPCS from tiff+tfw files

Eric G. Miller egm2 at jps.net
Wed Feb 28 02:13:10 EST 2001

On Tue, Feb 27, 2001 at 02:47:06PM -0500, mberglund wrote:
> Hello all,
> I am a newbie, but have looked long and hard for a direct answer to what
> seems to be a simple problem.
> I would like to take a series of doqq's which are in tiff/tfw file and UTM
> projection and:
> 	1: import them into grass
> 	2: reproject the doqq to SPCS from UTM
> 	3: overlay a shape file of a grid system(in SPCS)
> 	4: divide each portion of the doqq according to the grid
> 	5: export each chunk into the same tiff/tfw combination
> Basically, I want to create chucks along section lines of the doqq.
> I started to just try and import the 128M and my machine (PII/300
> 96M/Ram) ran for days (3) and ended up locking up, this was on grass5.x
> I am wondering if there is a memory issue with a file of this size. I
> noticed that as time grew on ram and swap were both growing boundlessly,
> but I was asleep when the final crash occured.
> In any event, am I going to need weeks and huge machines to do this?
> And is there a simplified run down of how this can be accomplished(most
> directly).

Looks like a memory leak was introduced when tile support was added to
r.in.tiff.  Memory allocation should essentially remain constant.  Will
try to fix this...

Eric G. Miller <egm2 at jps.net>

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