On Fri, 28 Mar 2008, Tim Keitt wrote: > I'm trying to see if I can track down a bug in X windows that causes > it to crash when plotting (I believe) very small filled polygons (or > it may have to do with large numbers of polygons). I first noticed > this running QGIS. Loading a PostGIS layer with ~3K polygons will > cause X to abort. I can load the layer if I have already zoomed into a > smaller region of the coverage. Once I try to zoom out to the full > extent, X dies. > > So I tried loading the polygons into "sp" using "readOGR" which works > great. I could then plot the polygons, no problem. But when I called > "spplot" which I believe fills the polygons, same problem. X crashes. > > Can anyone confirm this behavior? Try plotting a large number of > polygons with spplot and also try very small polygons (less than a > pixel size). I can send around the shapefile if anyone is interested. > It contains GSHHS coastlines for Micronesia.
I can't reproduce any problems on http://www.census.gov/geo/cob/bdy/co/co00shp/co99_d00_shp.zip library(rgdal) usc <- readOGR(".", "co99_d00") # OGR data source with driver: ESRI Shapefile # Source: ".", layer: "co99_d00" # with 3489 rows and 9 columns plot(usc, col=rainbow(52)[usc$state1]) spplot(usc, "STATE", col.regions=rainbow(52)) and: $ xdpyinfo name of display: :0.0 version number: 11.0 vendor string: The X.Org Foundation vendor release number: 60802000 X.Org version: 6.8.2 ... screen #0: dimensions: 1280x1024 pixels (361x271 millimeters) resolution: 90x96 dots per inch depths (7): 16, 1, 4, 8, 15, 24, 32 Could you please make your file available - maybe there is something particular about it? Is there way of asking X which driver it is using (here nvidia proprietary for Legacy GPU version (1.0-71xx series), full details in /proc/driver/nvidia)? Roger > > THK > > -- Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: [EMAIL PROTECTED] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
