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

[Roger Bivand]

On Sat, 29 Mar 2008, Tim Keitt wrote:

> On Sat, Mar 29, 2008 at 10:25 AM, Tim Keitt <tkeitt at gmail.com> wrote:
>>
>> On Sat, Mar 29, 2008 at 10:01 AM, Tim Keitt <tkeitt at gmail.com> wrote:
>> >
>> > 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.
>>
>>  OK. It is at http://www.keittlab.org/~tkeitt/melanesia.tgz. I just
>>  confirmed loading this file into QGIS 0.9.2-rc2 reproduces the X
>>  crash. I'll test the same under Hardy shortly (requires a chroot).
>>
>>  THK
>>
>>
>>
>> >
>> >  This has happened on my desktop using both nvidia and vesa drivers and
>> >  on my laptop with the intel driver.
>
> I just confirmed the same bug under Hardy Heron again using QGIS
> 0.9.2-rc2. I'll try with "spplot" next.

I'll try melanesia on my system, please try the US counties shapefile on 
yours.

Roger

>
> THK
>
>> >
>> >  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/
>> >  Please support open document formats http://opendocument.xml.org/
>> >
>>
>>
>>
>>  --
>>  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/
>>
>
>
>
>

-- 
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