On Sat, Mar 29, 2008 at 8:41 AM, Roger Bivand <[EMAIL PROTECTED]> wrote: > 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)?
I'll put the file someplace where it can be downloaded. This has happened on my desktop using both nvidia and vesa drivers and on my laptop with the intel driver. THK > > 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] > > -- Timothy H. Keitt, Assistant Professor University of Texas at Austin http://www.keittlab.org/ Contact info and schedule at http://www.keittlab.org/~tkeitt/ Please support open document formats http://opendocument.xml.org/ _______________________________________________ R-sig-Geo mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
