Re: [R-sig-Geo] Plot mean of variable on a map

2010-11-12 Thread Arien Lam
ent -- Department of Economics University of North Carolina at Chapel Hill ___ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo -- Arien Lam Dept. of Physical Geography Utrecht University, NL ___

Re: [R-sig-Geo] spatial projections

2010-09-16 Thread Arien Lam
ns in both axes, not just overall distance, relative to an arbitrary point on earth. Hth, Arien Many Thanks, James Stegen -- Arien Lam ___ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo

Re: [R-sig-Geo] read NITF save as geotif

2009-05-20 Thread Arien Lam
009 > ___ > R-sig-Geo mailing list > R-sig-Geo@stat.math.ethz.ch > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > -- drs. H.A. (Arien) Lam (Ph.D. student) Department of Physical Geography Faculty of Geosciences Utrecht University

Re: [R-sig-Geo] different samples size for each polygon and raster question

2009-04-09 Thread Arien Lam
Carolina U.S.A. > > -- AND -- > > Communications Manager > Southeast Regional Network of Expertise and Collections > sernec.org > > ___ > R-sig-Geo mailing list > R-sig-Geo@stat.math.ethz.ch > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > -- drs. H.A. (Arien) Lam (Ph.D. student) Department of Physical Geography Faculty of Geosciences Utrecht University, The Netherlands ___ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo

Re: [R-sig-Geo] How to generate the coordinates of a circle if i know its center's coordinates and radius?

2007-11-22 Thread Arien Lam
For geographical coordinates, start with: https://stat.ethz.ch/pipermail/r-sig-geo/2007-September/002595.html Cheers, Arien zhijie zhang schreef: > Hi all, > How to generate the coordinates of a circle if i know its center's > coordinates and radius? > I want to overlay the circle with anoth

Re: [R-sig-Geo] LL from bearing and distance

2007-09-27 Thread Arien Lam
The following function does what Eric describes, if the earth's surface is close enough to a sphere. Roger, I'll try to document it properly for inclusion in Maptools. Cheers, Arien # compute the place where you end up, if you travel # a certain distance along a great circle, # which is uniqu

Re: [R-sig-Geo] Surface Maps

2006-10-25 Thread Arien Lam
> Get a sneak peak at messages with a handy reading pane. > [[alternative HTML version deleted]] > > > > > > ___________ > R-sig-Geo mailing list > R-sig-Ge

Re: [R-sig-Geo] drawing order in spplot

2006-07-06 Thread Arien Lam
PROTECTED]@cellsize[1]*(1:[EMAIL PROTECTED]@cells.dim[1]) > z <[EMAIL PROTECTED]@cellsize[2]*(1:[EMAIL PROTECTED]@cells.dim[2]) > > y2<-grid[[drape]] > y2[!is.na(y2)]<-as.numeric(cut( y2[!is.na(y2)],length(pal))) > y2[is.na(y2)]<-0 > > ylim <- r