[R-sig-Geo] I've a problem with krige and would appreciate any thoughts...

2009-04-19 Thread Peter S. Hayes
Hello list, I have some data I am attempting to krige as an example for my class to perform. Most of the work has been reading in, reprojecting, and formatting data... all fine. But, when I create the variogram, grid, and variogram model and pass these into fit.variogram, I receive an erro

[R-sig-Geo] 'Cleaning' unioned polygons using sp and maptools...

2009-03-03 Thread Peter S. Hayes
Hi List, Here's a question... I have a watershed polygon that has been 'tiled' into separate and non-overlapping cells according to a combination of attributes. The original watershed boundary seems not to be available in undivided form and I was interested in retrieving it from the divided s

Re: [R-sig-Geo] SpatialPolygons decomposition...

2009-02-14 Thread Peter S. Hayes
#show representation of variables (str(tx3_sp)) #shows representation of geometries too. names(tx3_sp) #nice but lengthy Let us know if this helps you any. Good luck, Jim Burke Peter S. Hayes wrote: Hi All, I'm trying to teach a

[R-sig-Geo] SpatialPolygons decomposition...

2009-02-13 Thread Peter S. Hayes
Hi All, I'm trying to teach a spatial analysis class using R as a means of learning some details... I'm not an expert in R myself, but am learning it while using it as a 'tool' for lessons in the class... In getting the students familiar with some of the SP classes, we began looking at the c