Hi,
You could use the function spplot in the sp-pacakge. Use the sp.layout
argument to add the shapefile to the plot. All the data needs to be in
one of the Spatial classes provided by the sp-package. The code could
look something like:
library(sp)
library(maptools)
points = read.table("points
This is what I usually do:
(points is a dataframe with x and y columns)
library("sp")
coordinates(points)=~x+y
polygon<-readShapePoly("shapefile.shp")
a<-overlay(points,polygon)
# a will contain the id's of the polygons per point
# . to get the attributes for every point I use:
polygon[a,[EMAIL PR
On Fri, 2 Nov 2007, Honey Giroday wrote:
>
> Hi everyone
> I am a new useR running R on a Windows platform with Emacs. I have been
> searching package manuals and email archives trying to solve this
> problem but have been unable to find a solution. Your help with this is
> appreciated.
>
>
Hi everyone
I am a new useR running R on a Windows platform with Emacs. I have been
searching package manuals and email archives trying to solve this problem but
have been unable to find a solution. Your help with this is appreciated.
I have generated random points within a polygon shapefile
On Wed, 31 Oct 2007, Sam Field wrote:
> List,
>
> When the influence of explanatory variables "spills over" into adjacent
> or proximate spatial units, one way to model this would be to include a
> spatially lagged explanatory variable (WX). If there exists a
> significant spatially lagged asso
Thanks Hisaji,
The problem is that my line is not an straight line, but
a very complex polyline (a boundary between types of forest
manually digitized over aerial photography) imported from a shp file
into a SpatialLinesDataFrame object.
Regards,
Agus
Hisaji ONO escribio':
> Hi.
>
> I've crea
Hi.
I've create very simple example "cutting polygon by line
c(0,5,10,5)" using by gpclib.
library(maptools)
library(gpclib)
x1<-t(structure(c(0,0,10,0,10,10,0,10,0,0),dim=c(2,5))) #
simple square
### method using buffer
min_buffer_dist <- 1e-10 # set minimum value
x2<-t(structure(c(-1,5
