Thanks -- another few questions along these lines:
1) Is there any way to determine the type of vector file in advance of
defining a layer name? How can I list layer names affiliated with a
given vector (it seems to be part of ogrinfo from the main gdal release,
but when i do a ogrinfo(filena
If you work with large shapes/grids, try also SAGA:
> rsaga.get.usage(lib="grid_gridding", 3)
SAGA CMD 2.0.3
library path: C:/Progra~1/saga_vc/modules
library name: grid_gridding
module name : Shapes to Grid
...
But before SAGA, you need to reproject the polygons first (if necessary).
see
Jonathan Greenberg schreef:
How do I take a polygon in some OGR supported vector layer (say, a
shapefile), and rasterize it given a pixel size and projection/datum?
--j
Take a look at the spsample() function.
Paul
--
Drs. Paul Hiemstra
Department of Physical Geography
Faculty of Geosciences
How do I take a polygon in some OGR supported vector layer (say, a
shapefile), and rasterize it given a pixel size and projection/datum?
--j
--
Jonathan A. Greenberg, PhD
Postdoctoral Scholar
Center for Spatial Technologies and Remote Sensing (CSTARS)
University of California, Davis
One Shield
Dear List,
I have a complete (distance/border based binary) spatial weights matrix
from Stata (e.g. as a txt-file). I want to apply spatial filtering in
spdep, however the routine needs an "nb" object. Is there any way to
extract the information from my matrix automatically (something like
mat2nb
Thank you, everyone!
Let me go walk through some of this, look at the help for some functions
that I haven't yet looked at, and see what I can make of it all! :-)
I let myself become trapped in a lab class with this issue... found that
the as.data.frame() worked fine on SpatialPoints, but ran
On Fri, 13 Feb 2009, Jim Burke wrote:
Hi Peter,
I think I am three days ahead of you on the learning curve. So come join me!
Below is a cumulation of suggestions from Rodger Bivand.
Perhaps the code below may help. Start out with your own SpatialPolygon.
Change it to a dataframe. Then do so
On Fri, 13 Feb 2009, Peter S. Hayes wrote:
Hi All,
I'm trying to teach a spatial analysis class using R as a means of learning
some details... I'm not an expert in R myself, but am learning it while using
it as a 'tool' for lessons in the class...
In getting the students familiar with some
