Re: [R-sig-Geo] kernels, contours, points?

2008-07-17 Thread Jeebz
That's exactly the issue I think: anyone know how to turn a contour into a polygon?? On Jul 17, 2008, at 6:48 AM, Ashton Shortridge wrote: I think creative use of the overlay() function would accomplish what you want. Some example code that is a bit like what you propose (uses the sp libra

Re: [R-sig-Geo] package for bidimemsional regression

2008-07-17 Thread Hisaji ONO
Hello. I've tried to implement Euclid and Affine versions of Bidimensional Analysis. # #algorithms an data from Nakaya, T. (1998): Statistical analysis of spatial distortion: an application of bidimensional regression procedure, The Ritsumeikan Bungaku 553, 1333-1356. in Japanese # # You had be

[R-sig-Geo] creating a multi-band SpatialGridDataFrame

2008-07-17 Thread Jonathan Boyd Thayn
I used the rgdal package to open a geoTiff and then manipulate the data. The result is a 3-dimensional array that I want to convert back to a SpatialGridDataFrame in order to save it as a geoTiff. I used the following code: grd <- GridTopology(gt[,1],gt[,2],gt[,3]) SGDF <- SpatialGridDat

Re: [R-sig-Geo] kernels, contours, points?

2008-07-17 Thread Ashton Shortridge
I think creative use of the overlay() function would accomplish what you want. Some example code that is a bit like what you propose (uses the sp library): # I have a polydataframe object: my.poly.data <- SpatialPolygonsDataFrame(my.poly, area.lu.table) # I have a set of point objects (derived, i