Greetings to all,
I have monthly mean satellite image time series that come in a 4-column
text file each. I have dozens of such files. Every line correspond to a
pixel that is projected onto a regular ISIN grid. The first column is
the ISIN grid number (same coordinates for a given grid number
If you really just need a grid then pixellate.psp in spatstat can do
this, pass in the "length" with the weights argument.
On Sat, Apr 9, 2011 at 12:32 AM, Barry Rowlingson
wrote:
> Slow and dirty method:
>
> lineLengthIntersects <- function(gridpolys,linegeom){
> ngrids = length(gridpolys)
> l
In case my request wasn't really clear, let me rephrase:
I'd like to overlay some polygons onto a raster, by plotting with a line
density fill instead of a solid fill, as shown here
http://r-spatial.sourceforge.net/gallery/#fig15.R. Ideally I would be
able to modify the angle of the lines. I
Hello again R-sig-geo-ers,
Does anyone know how to convince spplot to create a figure like
http://r-spatial.sourceforge.net/gallery/#fig15.R
I would like to overlay some polygons onto a raster, and I need to do it
with spplot for the lattice functionality. I've looked at the help and
the fu
Slow and dirty method:
lineLengthIntersects <- function(gridpolys,linegeom){
ngrids = length(gridpolys)
ll = rep(0,ngrids)
for(i in 1:ngrids){
geomint = gIntersection(linegeom,gridpolys[i])
if(!is.null(geomint)){
ll[i] = SpatialLinesLengths(geomint,TRUE)
}
}
return(ll)
On Fri, Apr 8, 2011 at 9:10 AM, jonathan daeden
wrote:
> Dear list,
>
> I am looking for a way to measure lines crossing polygones or a grid.
> I have a line shapefile representing a coastline and a regular grid over it.
> I would like to measure the coastline in each cells of the grid and keep it
On 04/08/2011 12:40 PM, piero campa wrote:
> Dear list,
> I have datasets of different variables with different spatio-temporal
> supports, and I'd like to [co]krige them together.
>
> What I'd like to ask you is:
> - I know that with block kriging one could estimate values over a different
> su
Dear Colin,
Thank you very much. I've uploaded shapefile to:
http://dl.dropbox.com/u/116353/OD87.zip
Yours,
Leonardo.
On Thu, Apr 7, 2011 at 6:39 PM, Colin Rundel wrote:
>
>> I am getting the following error message when I try:
>>
>>> lineborder<-gBoundary(map1)
>> Erro em TopologyFunc(spgeom,
Dear list,
I have datasets of different variables with different spatio-temporal
supports, and I'd like to [co]krige them together.
What I'd like to ask you is:
- I know that with block kriging one could estimate values over a different
support area wrt the input variables, but is one allowed to h
Do you want to measure the *length* of the coastline in each grid cell?
Or do you want to measure the *presence* of the coastline in each cell?
Jacob.
--- On Fri, 8/4/11, jonathan daeden wrote:
> From: jonathan daeden
> Subject: [R-sig-Geo] [R-sig-geo] Sum lines when they intersect polygons
>
Dear list,
I am looking for a way to measure lines crossing polygones or a grid.
I have a line shapefile representing a coastline and a regular grid over it.
I would like to measure the coastline in each cells of the grid and keep it
in a data.frame.
Could not make it with Qgis so i would like to
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