[R-sig-Geo] Help with gpclib

Dear list members, I am running R 2.15.1 on a MAC OSX 10.7. I receive an error message regarding gpclib (see below): library(rgdal) library(maptools) library(rgeos) Loading required package: stringr rgeos: (SVN revision 330) GEOS runtime version: 3.3.2-CAPI-1.7.2 Polygon checking: TRUE

[R-sig-Geo] Converting UTMs to SpatialPolygons object

r-sig-geo listers: Can anyone provide code or suggest commands for converting a data frame with UTMS to a SpatialPolygons (sp package) object? Below, I provide code to generate a sample dataframe, with three ordered sequences of twelve coordinate pairs each. id

[R-sig-Geo] Converting UTMs to SpatialPolygons object

It seems my data-generating code was cut off. Here's another try: id = rep(seq(1,3),each=12)            # Generate polygon IDs' az = rep(seq(0,359,30),3)               # Generate azimuth sequence c = data.frame(id [1],az)               

Re: [R-sig-Geo] Converting UTMs to SpatialPolygons object

If you sent code it did not survive the journey. See the vignette in sp for how to build polygons from scratch, section 7.1. library(sp) vignette(intro_sp) On Mon, Jul 16, 2012 at 10:12 AM, s...@swbigelow.net wrote: r-sig-geo listers: Can anyone provide code or suggest

[R-sig-Geo] How to subset my data

Hello: I have a .txt file i'm reading in R with 3670016 nrows made up of (256 lat, 512 lon and 28 forecast time) and ncol=31(no of days in the month). I read the lat/lon data and got that my area of interest is at point row=93 to row 128 for lat and row 30 to 1 257 to 286 for lon. My issue is how

[R-sig-Geo] gstat and trend

G'day list, I'm calculating cross-variograms (variables below are sumso2=sulphur dioxide emissions and intensity=rain intensity - I have 2500 sample points) using GSTAT in R: g - gstat(NULL, id = sumso2, form = sumso2 ~ 1, data=d1) g - gstat(g, id = intensity, form = intensity ~ 1, data=d1)

[R-sig-Geo] using Geography markup languague (GML)

Hello everyone! Does anyone use GML, please? If so, could you recommend a good tutorial or intro book, please? I've used R to produce KML, but have never used GML. thanks, Erin Erin M. Hodgess, PhD Associate Professor Department of Computer and Mathematical Sciences University of Houston -

[R-sig-Geo] plotKML tutorial or vignette?

Hello again. I would like to investigate the plotKML package and was wondering if there is a tutorial or article or vignette available, please. Thanks, Erin Erin M. Hodgess, PhD Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto:

[R-sig-Geo] problem on krige in gstat package

Dear Rusers: I am using gstat package and met a problem about using krige. I searched the mailing list, but still cannot solve it. My sample dataset testdata could be downloaded from http://www.fdsr.cn/en/xzzq.aspx?KID=4 . It includes a screenshot from ArcGIS and the sample data. My codes are

Re: [R-sig-Geo] using Geography markup languague (GML)

Just in terms of R, you could check out support for the OGR GML driver in rgdal: http://www.gdal.org/ogr/drv_gml.html and the package sos4R which has GML support (though may be too specialized). There are links to the OGC documentation on the GDAL/OGR page. Cheers, Mike. On Mon, Jul 16, 2012 at

Re: [R-sig-Geo] using Geography markup languague (GML)

Great! thanks! Erin Erin M. Hodgess, PhD Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodge...@uhd.edu -Original Message- From: Michael Sumner [mailto:mdsum...@gmail.com] Sent: Sun 7/15/2012 9:28 PM To: Hodgess, Erin