[R-sig-Geo] R chrashes when reading vector from GRASS with readVECT6
Michal Gallay
mgallay01 at qub.ac.uk
Tue Mar 11 13:23:00 CET 2008
Dear R experts,
I am running R 6.2.2 and QGIS 0.8.1 on WinXP, 1.5 GB RAM, 1.8GHZ processor.
When I try to read a vector point dataset from a GRASS mapset
R looks like its working but it goes on for a very long time
even if the point dataset is small (1400 points).
After hitting ESC to terminate the process, R crashers.
require(spgrass6)
> gmeta6()
gisdbase D:/GIS_data/GB_data/GRASS
location 4_Langdale
mapset RST_ground_truth
rows 290
columns 400
north 507450
south 506000
west 328000
east 330000
nsres 5
ewres 5
projection NA
cv.vect <- readVECT6("cv.points")
However, sometimes after closing R and openning again I managed to read the
data and sometimes not. It appears to be more or less random behaviour.
Now, I wanted to read a big vector (1 million points). R crashes again.
There is no problem with readRAST6() even with a big raster.
Would you have any ideas where the problem is?
Thank you for your time and advice.
Best regards
Michal
--
Michal Gallay
Postgraduate Research Student
School of Geography, Archaeology and Palaeoecology
Queen's University
Belfast BT7 1NN
Northern Ireland
Tel: +44(0)2890 273929
Fax: +44(0)2890 973212
email: mgallay01 at qub.ac.uk
www: www.qub.ac.uk/geog
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