[R-sig-Geo] kml and points

[Patrick Giraudoux]

Roger Bivand a écrit :
> On Sat, 7 Aug 2010, Patrick Giraudoux wrote:
>
>> Dear All,
>>
>> I have just discovered  the fantastic possibilities given with 
>> kmlPolygon, klmLine and kmlOverlay (package maptools) to project 
>> spatial objects into google earth.
>>
>> Does anyone knows if a function equivalent has been written to create 
>> a kml file of "points" ? If not, is there a technical reason not to 
>> have done it or a workaround which would make such function unecessary ?
>
> Would the KML driver for writeOGR() in rgdal be enough? The variables 
> (or a subset of the variables) in the SpatialPointsDataFrame are 
> displayed in the bubble on clicking. You do not, I think, get a choice 
> of point symbol.
>
> td <- tempdir()
> data(meuse)
> coordinates(meuse) <- c("x", "y")
> proj4string(meuse) <- CRS("+init=epsg:28992")
> meuse_ll <- spTransform(meuse, CRS("+proj=longlat +datum=WGS84"))
> writeOGR(meuse_ll, paste(td, "meuse.kml", sep="/"), "zinc", "KML")
> file.show(paste(td, "meuse.kml", sep="/"))
>
> See http://www.gdal.org/ogr/drv_kml.html, and note the section on 
> encoding if on Windows.
>
> Roger
>


Sure, likely to be exactly what I need. I was not aware of this kml 
driver in rdgal (I was ready to write down a  function...).

Thanks a lot,

Patrick




>>
>> Patrick
>>
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>