[R-sig-Geo] Antw: problem with ndvi

Dear Vikram, I have update the RemoteSensing package in order to easily compute the DN to reflectance conversion. For Unix system you should be able to update RemoteSensing to 0.4.2 with this updates. On Windows you have to wait a little more. try: metafile -

Re: [R-sig-Geo] Antw: problem with ndvi

Dear Matteo, I work on windows, but I calculated the NDVI from on sensor reflectance (toa reflectance) with 'Landsat' package. I already try the 'RemoteSensing' package and really liked it. Though I am waiting for windows version of this package. I found this bit easier than 'landsat' package.

[R-sig-Geo] determine class breaks for a spatial object that vary by size that may influence presence/absence

Hi, I'm looking for a type of exploratory analysis for spatial data that will help me to determine the relationship between presence/absence of developed land use (a complete raster coverage) and minimum distance to lakes or ponds WHERE the surface area of the lake or pond might exert an

[R-sig-Geo] rgdal - problem with reading grib files

Hi, I am stuck when trying to read data from certain grib files with GDAL. When I try to read the data I get the following error: tmp - readGDAL('./data/ghcn_cams/ghcn_cams_1948_cur.grb') ... Error in `proj4string-`(`*tmp*`, value = S4 object of class CRS) : Geographical CRS given to