On Jun 7, 2010, at 2:23 PM, Hans-Jörg Bibiko wrote:
> On Jun 7, 2010, at 1:36 PM, Heuvelink, Gerard wrote:
> I used 'Add polygon' in Google Earth to create a (single) closed polygon. It
> was saved with extension kmz.
>>
>> How can I open such a file in R, such that I can for instance do an overlay
>> with raster maps (SpatialGridDataFrame)?
>
> Here only my first thoughts:
> kmz files are nothing else then zipped kml files. You can save your polygon
> in Google Earth by choosing "kml" as format, or unzip your kmz file and
> rename it to *.kml, or read the kmz as zip connection in R and process the
> data coming from that connection.
Here a tiny R example:
library(maptools)
getKMLcoordinates(textConnection(system("unzip -p /Users/foo/test.kmz", intern
= TRUE)))
--Hans
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