Problems with mask (raster)
Hola Manuel, Regarding the values of the .bil files I was dealing with that also sometime ago. I found this link in a forum who helped me understand what is going on with these files: http://pvanb.wordpress.com/2010/02/06/importing-worldclim-climate-bil-datalayers-in-grass-gis/ So I wrote in R something like this to get the right values: library(raster) bio <- raster("bio1_23.bil") ind <- which(bio[] > 32767) bio[ind] <- bio[ind] - (65535+1) bio[bio[] == -9999] <- NA bio plot(bio) Hope this helps. Saludos, pura vida Jaime On Thu, 14 Oct 2010 16:17:25 -0600
Manuel Sp?nola <mspinola10 at gmail.com> wrote:
Thank you very much Robert, Now I have this error:
me <- maxent(bio1res, arb)
Error en .local(x, p, ...) : more than half of the presence points have NA predictor values It could be related to the raster "bio1res"? The origin of this file is .bil files. Which is the best file format to work with bioclim data? The plot(bio1res) display with a legend with values from 0 to 50000 and the raster is for temperature. bio1res class : RasterLayer filename : nrow : 382 ncol : 407 ncell : 155474 min value : 47 max value : 55537 projection : NA xmin : -85.95 xmax : -82.55833 ymin : 8.041667 ymax : 11.225 xres : 0.008333333 yres : 0.008333333 Best, Manuel On 14/10/2010 02:44 p.m., Robert J. Hijmans wrote:
I think it should be: res<- mask(bio1cr, crmask) On Thu, Oct 14, 2010 at 1:22 PM, Manuel Sp?nola<mspinola10 at gmail.com> wrote:
Dear list members,
I am working with bioclim variables to model species
distribution.
The files downloaded from Worldclim.org are generic
raster files (.bil)
I transform this files to raster:
bio1<- raster("bio1_23.bil")
cr = readOGR(dsn="C:/ProyectoRespacial/EvalHab_reporte",
layer="Cr_wgs84_meso")
bio1cr<- crop(bio1, cr)
crmask<- polygonsToRaster(cr, bio1cr)
res<- mask(bio1, crmask)
Error en compare(x, mask) : Different bounding box
plot(bio1cr) the scale legend shows numbers from 0 to
55000
Best,
Manuel
--
*Manuel Sp?nola, Ph.D.*
Instituto Internacional en Conservaci?n y Manejo de Vida
Silvestre
Universidad Nacional
Apartado 1350-3000
Heredia
COSTA RICA
mspinola at una.ac.cr
mspinola10 at gmail.com
Tel?fono: (506) 2277-3598
Fax: (506) 2237-7036
Personal website: Lobito de r?o
<https://sites.google.com/site/lobitoderio/>
Institutional website:
ICOMVIS<http://www.icomvis.una.ac.cr/>
[[alternative HTML version deleted]]
_______________________________________________ R-sig-Geo mailing list R-sig-Geo at stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
-- *Manuel Sp?nola, Ph.D.* Instituto Internacional en Conservaci?n y Manejo de Vida Silvestre Universidad Nacional Apartado 1350-3000 Heredia COSTA RICA mspinola at una.ac.cr mspinola10 at gmail.com Tel?fono: (506) 2277-3598 Fax: (506) 2237-7036 Personal website: Lobito de r?o <https://sites.google.com/site/lobitoderio/> Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/> [[alternative HTML version deleted]]