There is a difference between visual perception of points being on a
grid, and the numerical confirmation of this.
Have you tried
grid_new - points2grid(SpatialPoints(coord_nficentroid),
tolerance= 0.41, round=NULL, fuzz.tol=3)
as the message sugggested?
On 11/02/2010 03:03 AM, Yan
On 11/01/2010 09:53 PM, Muenchen, Robert A (Bob) wrote:
Hi All,
I'm having great fun learning the vast array of mapping options in R. I'm now
working on a teaching example (below) that will step slowly through creating
a tiny map, converting it to SpatialPolygons and then plotting a
Hello List,
I need to reassign coordinates of a few points to have coordinates of
the nearest raster cell. I KNOW that this is BAD practice but for the
time being I assume that it does not affect my analysis (species
distribution analysis). I think the datum of the point data is different
On Tue, 2 Nov 2010, Brian Oney wrote:
Hello List,
I need to reassign coordinates of a few points to have coordinates of the
nearest raster cell. I KNOW that this is BAD practice but for the time being
I assume that it does not affect my analysis (species distribution
analysis). I think the
That did it, thanks. Love your book!
Cheers,
Bob
-Original Message-
From: r-sig-geo-boun...@stat.math.ethz.ch [mailto:r-sig-geo-
boun...@stat.math.ethz.ch] On Behalf Of Edzer Pebesma
Sent: Tuesday, November 02, 2010 3:05 AM
To: r-sig-geo@stat.math.ethz.ch
Subject: Re: [R-sig-Geo] Bubble
On Tue, Nov 2, 2010 at 10:00 AM, Brian Oney zenli...@gmail.com wrote:
Hello List,
I need to reassign coordinates of a few points to have coordinates of the
nearest raster cell. I KNOW that this is BAD practice but for the time being
I assume that it does not affect my analysis (species
Dear all
I am having problems when reading shapefiles using readOGR with the
rgdal package. I have read several times these files in the past without
any problem. Since a few days, while I apparently did not change
anything (no update, similar version of R, same shapefiles), I always
have
Manuel,
You can have a look at:
library(raster)
?distance
Robert
On Mon, Nov 1, 2010 at 4:39 AM, Manuel Spínola mspinol...@gmail.com wrote:
Dear list members,
I am interested in knowing how to make a raster with distance to lines
or point features. For example distance to rivers or
Yan,
An alternative approach, if you want to force regularly spaced points
to a grid that you know the parameters of, you could first create that
grid and then link the values by cell numbers
library(raster)
r - raster(ncol=10, nrow=10, xmn=.. xmx= etc)
cells - cellFromXY(r, xy)
r[cells] -
Hello Barry and Roger,
Thank you for the suggestions.
I got the nn2() function to work and took the coordinates of the nearest
non-NA raster cell and assigned them to the points. I forgot to mention
that I have raster cells that are non-NA and some that are not and my
point lay in the NA zone
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