Hi,
I have a vector map with attributes in a dbf file. There are 1165 entities
in the map and in the dbf file. I created a column COMET directly in the
dbf file and populated with values (actually 60 entities have an integer
value different from 0).
I would like to display a map with circles proportionate to the COMET
value. I tried to use d.vect.chart as follows:
d.vect.chart map=cp_clean columns=COMET sizecol=COMET
This begins to draw the circles but then uses up almost all of my 512MB of
RAM, giving me an 'OUT OF MEMORY!' error message after some time.
What could be the problem ? Is d.vect.chart the right tool for what I wish
to do ?
Moritz
Moritz Lennert said:
Hi,
I have a vector map with attributes in a dbf file. There are 1165 entities
in the map and in the dbf file. I created a column COMET directly in the
dbf file and populated with values (actually 60 entities have an integer
value different from 0).
I would like to display a map with circles proportionate to the COMET
value. I tried to use d.vect.chart as follows:
d.vect.chart map=cp_clean columns=COMET sizecol=COMET
This begins to draw the circles but then uses up almost all of my 512MB of
RAM, giving me an 'OUT OF MEMORY!' error message after some time.
What could be the problem ? Is d.vect.chart the right tool for what I wish
to do ?
Replying to myself for a follow-up: since GRASS5.1 does not have site data
anymore, I cannot use the 'size_att #' option in ps.map, and I cannot see
any alternative in the vpoints section. So d.vect.chart is really the only
current option in 5.1 ?
Moritz
On Wednesday 28 May 2003 18:23, Moritz Lennert wrote:
Moritz Lennert said:
> Hi,
>
> I have a vector map with attributes in a dbf file. There are 1165 entities
> in the map and in the dbf file. I created a column COMET directly in the
> dbf file and populated with values (actually 60 entities have an integer
> value different from 0).
>
> I would like to display a map with circles proportionate to the COMET
> value. I tried to use d.vect.chart as follows:
>
> d.vect.chart map=cp_clean columns=COMET sizecol=COMET
>
> This begins to draw the circles but then uses up almost all of my 512MB of
> RAM, giving me an 'OUT OF MEMORY!' error message after some time.
I don't see any obvious memory leakage in code. Is the memory consumed
by module or dbf driver? Could you try to display 1) charts with sizecol
where ALL values are > 0, 2) use ctype=bar
> What could be the problem ? Is d.vect.chart the right tool for what I wish
> to do ?
Right tool would be sizecol option in d.vect (not yet available).
Replying to myself for a follow-up: since GRASS5.1 does not have site data
anymore, I cannot use the 'size_att #' option in ps.map, and I cannot see
any alternative in the vpoints section.
sizecol for vpoints is not implemented yet.
So d.vect.chart is really the only current option in 5.1 ?
Yes, I am not capable to do everything so quickly.
Radim
Radim Blazek said:
On Wednesday 28 May 2003 18:23, Moritz Lennert wrote:
Moritz Lennert said:
> Hi,
>
> I have a vector map with attributes in a dbf file. There are 1165
entities
> in the map and in the dbf file. I created a column COMET directly in
the
> dbf file and populated with values (actually 60 entities have an
integer
> value different from 0).
>
> I would like to display a map with circles proportionate to the COMET
> value. I tried to use d.vect.chart as follows:
>
> d.vect.chart map=cp_clean columns=COMET sizecol=COMET
>
> This begins to draw the circles but then uses up almost all of my
512MB of
> RAM, giving me an 'OUT OF MEMORY!' error message after some time.
I don't see any obvious memory leakage in code. Is the memory consumed
by module or dbf driver?
The memory is consumed by the module.
Could you try to display 1) charts with sizecol
where ALL values are > 0, 2) use ctype=bar
1) works beautifully (except for a little line at 90° right from the top)
2) works beautifully (including with 0 values)
> What could be the problem ? Is d.vect.chart the right tool for what I
wish
> to do ?
Right tool would be sizecol option in d.vect (not yet available).
Replying to myself for a follow-up: since GRASS5.1 does not have site
data
anymore, I cannot use the 'size_att #' option in ps.map, and I cannot
see
any alternative in the vpoints section.
sizecol for vpoints is not implemented yet.
So d.vect.chart is really the only current option in 5.1 ?
Yes, I am not capable to do everything so quickly.
I hope I didn't sound too impatient or negative. On the contrary, I love
what I've seen in 5.1 so far so much that I don't want to go back to 5.0
So, please don't take my remarks as criticism, I just needed to know since
I will have to do some maps for work and wanted to know whether I could
already use 5.1 or go back to 5.0.
Now I know that it works in principle, except for print output other than
by screenshot.
Great work !
Moritz