Dear R-sig-geo,
I have been looking for an existing map of global PNV (potential natural
vegetation) that we could maybe use global soil / biomass modelling. So
far, I noticed only two data sources that could provide compatible data:
1. Levavasseur et al. 2012
(http://iopscience.iop.org/articl
Dear Ahmed,
A SpatialPolygons object is more complex than just a set of coordinates. I
suggest that you read the helpfile of SpatialPolygonsDataFrame. The example
in the helpfile for the SpatialPolygonsDataFrame class should be clear
enough.
Best regards,
ir. Thierry Onkelinx
Instituut voor natu
