units is semivariograms in GeoR
You will need to transform (re-project) your data into a suitable coordinate system - use the sptransform() function in the rgdal package, or look at p 64 in the ASDAR book. depending on where you data is and how large an area it covers will influence your choice of coordinate reference system, but you might get away with a UTM grid 19 North for Puerto Rico - have a look here : http://spatialreference.org/ref/epsg/32619/ cheers Ben
On 16/11/2011, at 11:42 PM, carolina monmany wrote:
Sorry. My problem is that I want the units in the x axis to be in meters but they are in degrees. How can I make R read the projected coordinate system, which is in meters, and not the geographic one? Thanks! 2011/11/16 Paul Hiemstra <paul.hiemstra at knmi.nl>
Hi, This is mail is a bit on the short side :), so please try and be more complete next time. I think what you want to know is what the units are in a semi-variogram. For the y-axis, they are the unit of the variable of interest squared. So if the variable is m/s, than the semi-variogram has units (m/s)^2. For the x-axis they are most probably the distance unit in which the coordinate system of your data set is, e.g. kilometer. hope this helps, Paul On 11/16/2011 03:08 PM, carolina monmany wrote: -- 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
-- --------------------------- A. CAROLINA MONMANY Universidad de Puerto Rico Departamento de Biologia - CN 235 POBOX 23360 San Juan, Puerto Rico 00931-3360 Tel: +1 787 764 0000 x2847 Fax: +1 787 764 2610 [[alternative HTML version deleted]]
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