from estUD to SpatialGridDataFrame in adehabitatMA

Ultimately, I need to export the objects to Arc/Info ASCII Grid format,
which can be achieved by using the Gdal AAIGrid driver, via the rgdal
package.  This fails in my system (using your ud object above):

---<--------------------cut here---------------start------------------->---
library(rgdal)
locs.gtiff<- create2GDAL(ud[[1]],
                           drivername="GTiff")
locs.aaigrid<- copyDataset(locs.gtiff,
                             driver="AAIGrid")
saveDataset(locs.aaigrid, "~/tmp/test.asc")
---<--------------------cut here---------------end--------------------->---

Returns this:

Error in .local(.Object, ...) : Dataset copy failed

---<--------------------cut here---------------start------------------->---

R>  sessionInfo()
R version 2.15.0 beta (2012-03-16 r58769)
Platform: x86_64-pc-linux-gnu (64-bit)

locale:
  [1] LC_CTYPE=en_CA.UTF-8       LC_NUMERIC=C               LC_TIME=en_CA.UTF-8
  [4] LC_COLLATE=en_CA.UTF-8     LC_MONETARY=en_CA.UTF-8    LC_MESSAGES=en_CA.UTF-8
  [7] LC_PAPER=C                 LC_NAME=C                  LC_ADDRESS=C
[10] LC_TELEPHONE=C             LC_MEASUREMENT=en_CA.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
  [1] rgdal_0.7-8         adehabitatHR_0.3.4  adehabitatLT_0.3.4  CircStats_0.2-4
  [5] boot_1.3-4          MASS_7.3-17         adehabitatMA_0.3.3  ade4_1.4-17
  [9] rgeos_0.2-5         stringr_0.6         deldir_0.0-16       sp_0.9-97
[13] latticeExtra_0.6-19 RColorBrewer_1.0-5  lattice_0.20-6

loaded via a namespace (and not attached):
[1] grid_2.15.0  plyr_1.7.1   tools_2.15.0
---<--------------------cut here---------------end--------------------->---