Hi All,
I was wondering if anyone has found a solution to the mentioned problem, as
I have a similar problem with a query function in RPyGeo.
I am trying to use the 'select_analysis' ArcGIS function that uses an sql
expression to select certain values/names from a field in an attribute
table. Th
On Thu, 17 Dec 2009, Dan Putler wrote:
Hi all,
For this particular problem, Dylan Beaudette is probably exactly right.
However, I ran into problems using similar tools in OpenJump when we
wanted to create a shapefile of a region that we could postal address
geocode against (the way the boundary
Hi all,
For this particular problem, Dylan Beaudette is probably exactly right.
However, I ran into problems using similar tools in OpenJump when we
wanted to create a shapefile of a region that we could postal address
geocode against (the way the boundary line segments were clipped was a
problem
Could I ask list participants who maintain packages depending on sp, or
who use sp in intensive ways with *Polygon* objects to consider trying out
the forthcoming release:
http://spatial.nhh.no/R/Devel/sp_0.9-53.tar.gz # source
http://spatial.nhh.no/R/Devel/sp_0.9-53.zip # R 2.10.1 Windows bina
> On Thu, 2009-12-17 at 11:07 +0100, Baptiste Coulmont wrote:
> > Hi,
> >
> > I'm working with R and various shapefiles created by the OpenStreetMap
> > project. Those shapefiles (the roads in particular) are quite big.
> >
> > How can I crop (or "trim", or "prune" those objects -- once in a
> > Sp
Hi,
I have used the sp pacakge, along with several other tools, to do
exactly this (although using road network files from other sources). It
can be done entirely within R via sp, and I've written R only code to do
it, but found it very slow (someone else on the list may have an idea as
to how to
Hi Baptiste,
I recently met a similar issue, and ended to the solution described here
(unfortunately, it's in French :-)):
ftp://ftp.cirad.fr/pub/group-r/groupe-r/Fiches/Foret.pdf
It uses point.in.polygon (package sp), and it is adapted to the special
case of the shapefile containing polygon
On Thu, 17 Dec 2009, Pete Larson wrote:
Roger,
OK, I did what you indicated here:
xy<-coordinates(fish)
test<-knn2nb(knearneigh(xy))
with a summary:
summary(test)
Neighbour list object:
Number of regions: 341
Number of nonzero links: 341
Percentage nonzero weights: 0.2932551
Average number of
Roger,
OK, I did what you indicated here:
xy<-coordinates(fish)
test<-knn2nb(knearneigh(xy))
with a summary:
summary(test)
Neighbour list object:
Number of regions: 341
Number of nonzero links: 341
Percentage nonzero weights: 0.2932551
Average number of links: 1
Non-symmetric neighbours list
T
In that case I would produce:
pdf("filename.pdf")
print(spplot(Insitu_sp, "SPM", parameters as suggested earlier))
dev.off()
pdf("filename.pdf")
print(spplot(Insitu_sp, "Si", etc))
dev.off()
and edit (move legends etc) in Incscape or some other post editing software.
That would be the fastest w
Hi,
I'm working with R and various shapefiles created by the OpenStreetMap
project. Those shapefiles (the roads in particular) are quite big.
How can I crop (or "trim", or "prune" those objects -- once in a
SpatialLineDataFrame -- if I need to work not on a national level but
on a municipal level
Wow this list is awesome. I have been in lists for a longtime but never saw such
a good intentioned support in any other place.
Thanks Torleif and everyone else for taking time and producing code for me.
Torleif's code creates maps that are close to what I seek to reproduce. The
normalization pe
On Wed, 16 Dec 2009, Pete Larson wrote:
Hello all,
I have a data frame with lat and lon coordinates for some sample areas (not a
grid) .
I was to create an nb object that I can use with spdep but am unsure as to
how to convert it.
Does anybody have any ideas?
Create a matrix of coordina
On Wed, 16 Dec 2009, Zia Ahmed wrote:
Thanks Andrews. It works fine. Nothing wrong with sp plot. I need to plot
boundary around of sampling locations. R-script I have written, I used
xyplot and levelplot.
This look like a two-step question, assuming that you need a line
representation of p
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