[R-sig-Geo] Great Circle distances in Automap, Gstat

[Paul Hiemstra]

So i think that projecting your data first would be a good idea. Saves
you a lot of trouble with great circle distances. For reprojection of
sp-objects you can use the spTransform function (rgdal).

cheers,
Paul

On 10/06/2011 07:25 AM, Edzer Pebesma wrote:
> library(sp)
> ?is.projected
> ?CRS
>
> Please note that to my knowledge (but I might be wrong) R does not
> have kriging functions with ready-to-go covariance functions that are
> valid on spherical coordinates. Of course you can write your own.
>
> Hth,
>
> On 10/05/2011 11:37 PM, Sandeep Patil wrote:
>> Hello
>>
>> I am using IDW and Kriging from these two libraries and have spatial
>> data in
>> Lat/Lon
>> coordinates. I am a bit confused about how to specify that i need great
>> circle
>> distances in my calculations. Any advice welcome
>>
>> Thanks
>>
>> Sandeep
>>
>>     [[alternative HTML version deleted]]
>>
>> _______________________________________________
>> R-sig-Geo mailing list
>> R-sig-Geo at r-project.org
>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>


-- 
Paul Hiemstra, Ph.D.
Global Climate Division
Royal Netherlands Meteorological Institute (KNMI)
Wilhelminalaan 10 | 3732 GK | De Bilt | Kamer B 3.39
P.O. Box 201 | 3730 AE | De Bilt
tel: +31 30 2206 494

http://intamap.geo.uu.nl/~paul
http://nl.linkedin.com/pub/paul-hiemstra/20/30b/770