[R-sig-Geo] Sleuthing X windows bug in Ubuntu Gutsy

[Tim Keitt]

On Sat, Mar 29, 2008 at 8:41 AM, Roger Bivand <Roger.Bivand at nhh.no> 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: Roger.Bivand at nhh.no
>
>



-- 
Timothy H. Keitt, Assistant Professor
University of Texas at Austin http://www.keittlab.org/
Contact info and schedule at http://www.keittlab.org/~tkeitt/
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