[R-sig-Geo] Reading multiple layer/geometry KML into R

[Robin Edwards]

I'm vaguely aware there is an issue with reading KML files into R that have
contain layers/geometries - e.g. as Barry describes in  this r-sig-geo post
<http://r-sig-geo.2731867.n2.nabble.com/convert-KML-file-into-shape-file-or-CSV-file-td4136757.html> 
, listing one particular problem as arising when "the individual KMZ files
which do contain the data have multiple layers".  Is there any way around
this, or is it insurmountable with rgeos as it stands?

A reproducible example:

library(rgdal)
setwd( {SPECIFY A FOLDER} )
download.file("http://www.scribblemaps.com/maps/kml/shackleton.kml",
"file.kml")
(lyr = ogrListLayers("file.kml"))
map = readOGR ("file.kml", layer=lyr, verbose = TRUE,
drop_unsupported_fields=T, dropNULLGeometries=T)

yields errors in Windows & Mac:

Windows: Error in ogrInfo(dsn = dsn, layer = layer, encoding = encoding,
use_iconv = use_iconv) : 
  Cannot open layer
OSX: Error in ogrInfo(dsn = dsn, layer = layer, encoding = encoding,
use_iconv = use_iconv) : 
  Multiple incompatible geometries: 1:2

Thanks in advance.



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