Displaying 20 results from an estimated 1000 matches similar to: "creating raster image in R"
2013 Apr 24
2
How to make a raster image in R from my own data set
Hi R-user,
I was trying to make a raster map with WGS84 projection in R, but I could not make it. I found one data set in Google that data is almost the same format as of mine. I wanted to make a raster map of temperature with 1 degree spatial resolution for the global scale.
I could make it in GIS software but I do have many variables (to be many raster images) and ultimately I am importing them
2018 May 24
0
Problem with adding a raster and a brick
On Thu, 24 May 2018 at 18:41 Mark R Payne <markpayneatwork at gmail.com> wrote:
Hi,
I seem to be having a problem adding the following two raster objects
together - one is a rasterLayer, the other is a rasterBrick. The extent,
resolution, and origin are the same, so according to my understand it
should work. The objects look like so:
> obs.clim
class : RasterLayer
dimensions : 60, 200,
2018 Jun 01
0
Problem with adding a raster and a brick
This is now fixed in development on RForge, you can try it out by
installing from there, or from the Github mirror with
devtools::install_github("rforge/raster/pkg/raster").
(To get fixes into raster email the maintainer directly - you might not get
a response but it'll be addressed).
Cheers, Mike.
On Thu, 24 May 2018 at 20:08 Michael Sumner <mdsumner at gmail.com> wrote:
2018 May 24
2
Problem with adding a raster and a brick
Hi,
I seem to be having a problem adding the following two raster objects
together - one is a rasterLayer, the other is a rasterBrick. The extent,
resolution, and origin are the same, so according to my understand it
should work. The objects look like so:
> obs.clim
class : RasterLayer
dimensions : 60, 200, 12000 (nrow, ncol, ncell)
resolution : 0.5, 0.5 (x, y)
extent : -70,
2011 Jan 24
0
writeRaster with raster package
Hello,
I have a problem writing a raster with the raster package.
I have the raster object "mask" which has the following geoinformation:
---- R output
> mask
class : RasterLayer
filename :
E:/Daten/FE/HyMAP/Luxembourg_2010/Kehlen_Useldange/mosaik/LUX_LC_noOverlap_mask
nrow : 5198
ncol : 2813
ncell : 14621974
min value : 0
max value : 255
2013 Mar 21
0
Problems of exporting raster to ArcGIS
Hello:
I am using R raster package to replace ArcGIS when processing multiple shp files. However, when I export R raster back to ArcGIS, it couldn't recognize R raster file correctly. For example, I used {raster} package and got a RasterLayer as followed.
class : RasterLayer
dimensions : 8280, 18480, 153014400 (nrow, ncol, ncell)
resolution : 0.008333334, 0.008333334 (x, y)
2008 Jul 15
1
code reduction (if anyone feels like it)
# I am sure that I could be more efficient than this but how? Thanks in
advance.
#GPS in Decimal Degrees in the form longitude latitude
RM215 <- matrix(c(-82.1461363, 33.5959109), nrow=1)
SC <- matrix(c(-82.025888, 33.606454), nrow=1)
RM202 <- matrix(c(-81.9906723, 33.5027653), nrow=1)
RM198 <- matrix(c(-81.926823, 33.4634678), nrow=1)
HC <- matrix(c(-81.920505, 33.46192), nrow=1)
2013 Jan 18
2
How to re-project ease( Equal Area Scalable Earth) grid with a ~25 km cylindrical projection to WGS84 0.25 degree?
I have nc files for global soil moisture,here is one file
https://echange-fichiers.inra.fr/get?k=f9DDllPKdUKs5ZNQwfq
from the metadata ,the projection is cylindrical and the resolution is 25
km(it is based on authalic sphere based on International 1924 ellipsoid).As
I want to compare with other data, I have to make them identical.
- my other data are in WGS84 with 0.25*0.25 degree resolution
2018 Mar 28
0
netCDF to GeoTIFF by layer in r
Hi Ahmed,
When reading from a ncdf file you can use the 'varname', 'lvar' and 'level' arguments - see the 'Details' section in the docs
https://www.rdocumentation.org/packages/raster/versions/2.6-7/topics/raster <https://www.rdocumentation.org/packages/raster/versions/2.6-7/topics/raster>
We can't tell what is in the ncdf file from what you report other
2013 Mar 19
1
How to get the rolling standard deviation in rasters?
I am using this code to calculate the moving average mean.It worked fine but
when I wanted to also calculate based on sd(stander deviation) I got the
error shown below.
I read this documentation of R movingFun and found that sd was mentioned at
http://hosho.ees.hokudai.ac.jp/~kubo/Rdoc/library/raster/html/movingFun.html
I wonder if needs any other things to conseder or sd is not at all supplied
2018 Mar 28
2
Fwd: netCDF to GeoTIFF by layer in r
Hi
I have a netCDF file of volumetric soil water content at four
different soil layers and want to convert each soil layer in the
netCDF file to a GeoTIFF layer. This code converts the netCDF file to
one GeoTIFF layer, i.e. unclear which soil depth.
file.nc <- "C:/Soil_Weather_data/Agro/VMC21/VMC21.nc"
file.tiff <- "C:/Soil_Weather_data/Agro /VMC21/VMC21"
importnetcdf
2013 Apr 16
1
Spatial Ananlysis: zero.policy=TRUE doesn't work for no neighbour regions??
Hello,
I'm new to R and to Spatial Analysis and got a problem trying to create a
Spatial Weights Matrix.
*I us the following code to create the Neighbourslist:*
>library(maptools)
>library(spdep)
>library(rgdal)
>location_County<- readShapePoly("....")
>proj4string(location_County)<- CRS("+proj=longlat ellps=WGS84")
>location_nbq<-
2012 Oct 18
1
spTransform longlat to utm
Dear all,
I am trying to project my LongLat-maps to a plane.
The ultimate purpose is to do a search of points in vicinity of other points using overlay-commands (sp) with radius in km.
I am applying spTransform (package rgdal) and it gives my some curious results.
An example.
Let's take a point lying somewhere in Germany, zone=32U
x <- 8.968735
y <- 49.454735
After conversion I
2018 Nov 03
1
odd NOTE in R CMD check of data; Rcpp module related
With the current version of the "raster" package (that I maintain), R CMD
check on packages "soilDB" and "PopGenReport" have this NOTE:
Package: soilDB
Check: data for non-ASCII characters
New result: NOTE
Error in .requirePackage(package) :
unable to find required package 'raster'
Calls: <Anonymous> ... .findInheritedMethods ->
2008 Aug 10
0
possible problem with rgdal
Hello all,
I recently installed rgdal 0.5.24-1 (kyngchaos framework) and I am having
trouble making sense of the row, col information provided.
> a = new("GDALDataset", "dummy.tif")
> GDALinfo("dummy.tif")
rows 420
columns 660
bands 1
ll.x -55.5
ll.y -14.5
res.x 0.008333334
res.y 0.008333334
oblique.x 0
oblique.y
2012 May 01
0
Plotting shapefiles on existing maps
Very helpful. One (possible) correction inline below...
On Thu, 30 Mar 2006, Ray Brownrigg wrote:
> > From: nhy303 at abdn.ac.uk
> >
> > I have plotted a map of the Barents Sea and surrounding coastline using:
> >
> > map('worldHires',ylim=c(50,85),xlim=c(5,65),fill=T,resolution=0)
> > map.axes()
> > map.scale(x=30,metric=T)
> >
> >
2020 Feb 20
3
Pregunta sobre rLandsat
Hola Ángel:
Yo creo que tendrías que establecer el sistema de coordenadas de
referencia de tu objeto raster antes de salvarlo como GTiff. Algo así:
crs(r1) <-"+proj=utm +zone=14 +datum=WGS84"
Saludos,
Marcelino.
El 20/02/2020 a las 1:42, Angel Cervantes escribió:
> Hola a todos, quisiera pedirles su ayuda. Estoy tratando de crear un raster a partir de una tabla de datos
2012 May 15
0
Problem with legend and RasterLayer
Dear,
I can't plot legend over a Rasterlayer.
My system is MAC OS Lion.
See my problem:
####### Data
> img
class : RasterLayer
dimensions : 5, 5, 25 (nrow, ncol, ncell)
resolution : 0.002245, 0.002245 (x, y)
extent : -48.33875, -48.32753, -20.35756, -20.34634 (xmin, xmax,
ymin, ymax)
coord. ref. : +proj=longlat +datum=WGS84 +no_defs +ellps=WGS84
+towgs84=0,0,0
2012 Sep 02
1
why variations in accuracy between R to ARCGIS for the same point reprojection?
Hi everyone,
I wonder if anyone knows the reason why the outputs of the same
reprojection in r and arcgis are different?. The magnitude of the
change can be up to 40 km in the poles.
Basically, I have a database of points equally separated by one degree
over the globe.
In ARCGIS, I am projecting the data in GCS-WGS-1984 and then
reprojected it to Berhmann to ensure equal area
2013 Mar 18
4
Why stacking rasters return NAs?
I have several rasters that I want to do some calculations ,basically
calculating the moving average.
dir2 <- list.files("D:\\2010+2011", "*.bin", full.names = TRUE)
saf=stack(dir2)
movi <- overlay(stack(saf),fun=function(x) movingFun(x, fun=mean,
n=3, na.rm=TRUE))
Error in .overlayList(x, fun = fun, filename = filename,