[R-sig-Geo] drawing order in spplot

Duncan Golicher dgoliche at sclc.ecosur.mx
Tue Jul 4 17:39:06 CEST 2006

Many thanks to everyone involved in putting together the excelent sp 
package. I have just used for teaching a brief intro to applied geostats 
with gstat. Students found life much easier than a year ago when I had 
to try to explain a less structured approach to the data.
A simple question arose after the class. According to the spplot 
documentation "for grids and polygons sp.layout is drawn afterwards (so 
the item will not be overdrawn by the grid and/or polygon)".
So in this example we expected a DEM to be drawn first, then municipal 

 > class(municipios)
[1] "SpatialPolygonsDataFrame"
 > class(chisgrid)
[1] "SpatialPixelsDataFrame"

municips <- list("sp.polygons", municipios)

The municipal boundaries are drawn first then overdrawn by the DEM, 
which was not what we expected or wanted. I couldn't find how to avoid 
this, apart from the simple solution of ..


instead of spplot.The figures on  http://r-spatial.sourceforge.net all 
appear to have the grid drawn first. Is there a way to reverse this?



Dr Duncan Golicher
Ecologia y Sistematica Terrestre
Conservación de la Biodiversidad
El Colegio de la Frontera Sur
San Cristobal de Las Casas, 
Chiapas, Mexico

Email: dgoliche at sclc.ecosur.mx 

Tel: 967 674 9000 ext 1310
Fax: 967 678 2322
Celular: 044 9671041021

United Kingdom Skypein; 020 7870 6251
Skype name: duncangolicher 
Download Skype from http://www.skype.com

More information about the R-sig-Geo mailing list