Hello,
I am not able to create a .kml raster via the 'kml' function of plotKML (see
the error below).
I am setting the path to gdal in my windows registry as 'C:/Program
Files/GDAL' -- the folder that contains 'gdalwarp.exe' and 'gdal_translate.exe'
upon gdal installation.
I have also set the
'
rast <-
raster(extent(-135.2,-135.1,58.1,58.2),nrows=10,ncol=10,crs=CRS('+init=epsg:4326'))
rast[]<-rnorm(ncell(rast))
kml(rast,kml.fold,kml.file,colour = 'black')
#______
Dave.
-----Original Message-
From: Paul Woods [mailto:p.wo...@
; should be gdalt <- "C:/Program
Files/GDAL/gdal_translate.exe"
Dave.
-Original Message-
From: Frede Aakmann Tøgersen [mailto:fr...@vestas.com]
Sent: Tuesday, October 13, 2015 9:59 PM
To: Vijay Lulla; Gregovich, Dave P (DFG)
Cc: r-sig-geo@r-project.org
Subject: RE: [R-sig-Geo
Hi,
I am performing a math operation on a stack of large rasters. The code below
uses smaller files for illustration and reproducibility.
Any alternative way of performing this task that does not create huge temporary
files, and perhaps cuts down on processing time, would be greatly appreciated.
not attached):
[1] rgdal_1.2-5 tools_3.3.3 Rcpp_0.12.9 grid_3.3.3
lattice_0.20-34
From: Gregovich, Dave P (DFG)
Sent: Thursday, April 06, 2017 9:27 AM
To: 'r-sig-geo@r-project.org'
Subject: Raster math on a stack of large rasters
Hi,
I am performing a math operation
Hello,
I would like to add rasters to a plotRGB plot, but they don't seem to register
correctly with the initial (=background) raster plotted, as illustrated with
the following code.
Does anybody out there know of a way to ensure that additional overlain rasters
register spatially with the initi
Hi,
I would like to obtain the distance from all not NA cells in a raster. This
works for smaller rasters, but seems difficult for the size of rasters (~ 8000
pixel square) I am working with.
Below is what I've tried. I would be OK calling other software from R, or using
some parallelization, i
0.7 foreign_0.8-69 gstat_1.1-6
rgdal_1.2-16
[7] raster_2.6-7 sp_1.2-5
From: Gregovich, Dave P (DFG)
Sent: Friday, July 06, 2018 8:23 AM
To: 'r-sig-geo@r-project.org'
Subject: Distance from not NA cells in a raster
Hi,
I would like to obtain the distance from all not NA cells in a raster
Hello,
I would like to project data in epsg 26931 (NAD83 Alaska State Plane zone 1
meters), variant A. There are two variants to the projection:
--variant A has its origin on the central line of the projection, on the
'aposphere equator'
--variant B has its origin at the projection center
Apparen
Hello,
Thanks kindly aforehand for any help you can lend. I am trying to perform a
simple classification of coarse vegetation types. I am getting an error when
trying to predict a randomForest model to a raster:
#Error in if (any(is.na(x))) stop("missing values in newdata") :
# argument is not i
Hello,
I often replace values in a raster based on values of another raster, like this:
n.row <- n.col <- 100
a <-raster(nrows=n.row,ncols=n.col)
b <- a
a[]<-rnorm(ncell(a))
b[]<-rnorm(ncell(b))
a[b > 0] <- 1
What would analogous code be that works for large rasters without running into
vector
Well, This may be somewhat remedial for some, but it is a voyage of discovery
for me:
It appears that using the 'overlay' function is the analogous method I was
looking for. I am not absolutely positive it works for *very* large rasters.
But it does seem to work with the 5 X 10^8-cell rasters I
Hello,
Does the 'KML' function from the raster package support an alpha channel?
The .kml file output via the code below suggests it does not, but I was hoping
for confirmation.
Thanks kindly.
Dave.
#__
library(raster)
r <- raster(nrows=108,
Hello,
I have a stack of about 40 rasters with about 1 X 10^7 cells in each. I did not
realize it, but it turns out the x-resolution and y-resolution differ at about
the 13th decimal point. And I would like to feed this stack into a function
(dynatopmodel::upslope.area) that requires xres(x)==yr
Hello,
I am new to R-sig-geo, thanks for your patience.
I am trying to bring GPS animal collar data into R and correctly project
it to NAD83 Alaska Stateplane zone 1 (epsg:26931 should be the correct
proj4 code). In leiu of any other way to verify if my projection is
working, I am comparin
Hello,
When I attempt to run this simple code example from the projectRaster()
examples, my new R installation (R 2.15.1, raster package 2.0-08, and rgdal
0.7-15) crashes:
r <- raster(xmn=-110, xmx=-90, ymn=40, ymx=60, ncols=40, nrows=40)
r <- setValues(r, 1:ncell(r))
projection(r)
newproj <- "+
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