Hi,
I've to apply a formula to a raster in relation to an index table
created from raster stack.
I'm trying to explain the problem:
I've three raster with same resolution, that I join in a raster
RasterStack, and from it I can obtain a table like this:
> data <- stack(dem,aer550,aer550_type)
Hello
I got a .gri file (data about density of population in Ireland from
http://www.diva-gis.org/gdata) that I would like to read with the readGDAL
function from the *rgdal* package. So have I to get a SpatialGrid object
from this file. Could you tell me if it's possible to do that with the *
rgd
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Hi list,
I'd like to plot3D() a raster layer using it's own coordinates instead of
the row-col system so I can easily add points.
Here's a demo
library(raster)
library(rgl)
r <- raster(matrix(1, nrow = 5, ncol = 5))
extent(r)
# class : Extent
# xmin: 0
# xmax: 1
# ymin
I don't know if this will clarify or add to the confusion as I don't know if
it's the same issue or another one with the same effect, but when using a
projected raster, I get some weird coordinates in 3d (really large). I can't
see how it is linked to my raster coordinates.
Example :
library(raste
Hi everyone,
I'm attempting to do some spatial analyses with a relatively simple data
set and I'm running into some issues. Here's my code:
sosp09 <- read.csv("f:\\sosp\\2009\\sosp09.means.csv", header=T)
sp.point <- cbind(sosp09$x, sosp09$y)
colnames(sp.point) <- c("LONG","LAT")
# Pro
Jeff, ?tri2nb suggests you to try
tri2nb(coordinates(data.sp))
On 07/07/2011 03:52 PM, Stratford, Jeffrey wrote:
> Hi everyone,
>
>
>
> I'm attempting to do some spatial analyses with a relatively simple data
> set and I'm running into some issues. Here's my code:
>
>
>
> sosp09 <- read.
Dear all,
I have a jpg map of altitudinal contours in my study area which I
would like to map and use in R to calculate the altitude and slope of
GPS coordinates.
So far, I have painstakingly traced these contours in ArcMap to create
a shapefile (of polylines) with altitude. I have now imported th
On Thu, Jul 7, 2011 at 5:25 PM, Sarah Papworth
wrote:
> Dear all,
>
> I have a jpg map of altitudinal contours in my study area which I
> would like to map and use in R to calculate the altitude and slope of
> GPS coordinates.
> So far, I have painstakingly traced these contours in ArcMap to creat
> I suspect there's a better way by looking at more than one nearby
> contour line and doing some interpolation
I've got fairly good algorithm going now, but it requires a bit of
modification of some sp package code.
Currently spsample can return random or regular points on a line,
but do
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Dear all,
I have been using the GLS model provided by nlme package in R. I was
wondering if it is possible to estimate an equivalent of R square for
GLS in any R package. Nlme package did not provide such estimations.
The only application that I found is Spatial Modeling Environment
(SME). Tha
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