[GRASS5] 5.7.1

[Helena]

Michael Barton wrote:
> I know this started out as a s.in.ascii discussion. But it is focused on
> GRASS 5.7 and v.in.ascii is the more relevant module to be considering here.

s.in.ascii never had this problem, it is the table creation that is causing it (see below).
> 
> I've imported hundreds of thousands of points using v.in.ascii. I don't have
> a time, but I am remembering about 15-30 minutes for about a half-million
> points. I'm using a Mac G5 single processor at 1.8 Mhz and 512 Mb RAM. This
> is a nice, but not extremely high powered system. While I'd like it to go
> faster, I don't think this is too bad. >
> v.in.ascii can also import sites files. Just use a text editor to get rid of
> the # and % characters. I haven't used v.in.sites with enough real data to
> get a feel for whether or not it is faster. However, v.in.ascii has more
> options for controlling how the sites are to be translated to vector points.

Michael, thanks for the hint - I tried v.in.ascii on the same data set -
with -t option it imported in seconds, without -t it went into swapping and
I had to kill it. So apparently it is the table creation that eats-up the memory.
Radim, can the table creation be done on smaller subsets of the data to avoid the
swapping ? Or maybe there is a simpler solution?

Helena

> 
> Michael
> 
> 
> On 12/3/04 5:06 AM, "Jaro Hofierka" <hofierka at geomodel.sk> wrote:
> 
> 
>>
>>Radim Blazek wrote:
>>
>>
>>
>>>
>>>5.7 is used more by normal users than by developers and they want stable
>>>version in their distributions. If 5.7 is slow with large data sets it
>>>does not mean that it cannot become stable version. It is ok with me to
>>>write in announcement that 6.0 is not suitable for making dems from
>>>datasets > ?00000 points.
>>
>>I don't think hundreds of thousand points are large datasets. They are
>>quite common if you do real projects. I routinely work with millions of
>>points. This must be fixed otherwise many people (including me) will
>>have to stick to 5.4 for a longer time than previously thought.
>>
>>Jaro
>>
>>
>>
>>-=x=-
>>Skontrolovan? antiv?rov?m programom NOD32
>>
> 
> 
> ______________________________
> Michael Barton, Professor of Anthropology
> School of Human, Evolution and Social Change
> Arizona State University
> Tempe, AZ  85287-2402
> USA
> 
> voice: 480-965-6262; fax: 480-965-7671
> www: http://www.public.asu.edu/~cmbarton
>