Re: [R-sig-Geo] expand the dist covariate of the prediction-grid meuse.grid (sp package)

/2010 09:39 AM, Christoph Hofer wrote: Dear list I would like to expand the covariate dist of the meuse.grid dataset, of the sp package, to the south-east direction. The value of the covariate dist is relative between [0,1]. Now, it is not clear for me how I shall calculate the distance

[R-sig-Geo] expand the dist covariate of the prediction-grid meuse.grid (sp package)

(is it the perpendicular between the river border and the grid point)? I appreciate for any tips or hints. Christoph ETH Zurich Christoph Hofer Soil and Terrestrial Environmental Physics Institute of Terrestrial Ecosystems CHN E 50.2 Universitätstrasse 16 8092 Zurich, Switzerland phone

[R-sig-Geo] Public reference dataset

Dear list I am looking for a public reference dataset (like the meuse dataset in the gstat package) to test some software for block kriging. I appreciate any hint. Regards Christoph ETH Zurich Christoph Hofer Soil and Terrestrial Environmental Physics Institute of Terrestrial Ecosystems

Re: [R-sig-Geo] Public reference dataset

? Christoph Hofer christoph.ho...@env.ethz.ch wrote: Dear list I am looking for a public reference dataset (like the meuse dataset in the gstat package) to test some software for block kriging. I appreciate any hint. Regards Christoph ETH Zurich Christoph Hofer Soil

Re: [R-sig-Geo] generate simulation data for a theoretical spatial model

rusers.sh, You can simulate stationary and isotropic Gaussian random fields ( and transformation of it) as well as max-stable random fields by using the RandomFields package. To get a conditional simulation of the correlated residuals of a linear model you can first simulate an unconditional

[R-sig-Geo] 2D interpolation

the function interp. But this is not a thin plate spline interpolation. Best regards Christoph Hofer ETH Zurich Christoph Hofer Soil and Terrestrial Environmental Physics Institute of Terrestrial Ecosystems CHN E 50.2 Universitätstrasse 16

[R-sig-Geo] Numerical simulation of elliptical random distribution in 2D

with given covariance structures, e.g. multivariate t-distribution. Are there possibilities in R to do that (specific package or algorithm) ? Thanks in advanec for your help Best regards Christoph ETH Zurich Christoph Hofer Soil Physics

Re: [R-sig-Geo] Can you query points with a polygon?

Hello Kenneth In the sp package you find the function point.in.polygon. Christoph Am 13.12.2006 um 06:24 schrieb Mulholland, Tom: Yes there is more than one. I can't remember when I made the decision but I recall doing some speed tests and I picked inside.owin in the spatstat package.

[R-sig-Geo] Function to cover polygons by rectangles

Dear all, Is there a function or package to cover arbitrary polygons by rectangles? I want to approximate a polygon area with as few rectangles as possible. Thanks in advance. Best regards Christoph ___ R-sig-Geo mailing list

Re: [R-sig-Geo] Function to cover polygons by rectangles

only be the coordinates of the polygon-vertices and the output are the coordinates of a number of regular rectangles. Best Regards Christoph Am 07.12.2006 um 10:23 schrieb Roger Bivand: On Thu, 7 Dec 2006, Christoph Hofer wrote: Dear all, Is there a function or package to cover

[R-sig-Geo] Fast calculation of block-block covariance

-block covariance of arbitrary shaped polygons? Best regards Christoph Hofer ___ 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] Fast calculation of block-block covariance

this, by reading it's description. Please share with us whether it did what you wanted or not; I acknowledge that this is a problem that other packages could benefit from a fast solution to this problem. Bests, -- Edzer Christoph Hofer wrote: Dear all I'm a Ph.D. student in Environmental Sciences