Dear rusers.sh,
Here are few simple examples of how to simulate (not-normal)
distributions and point processes using geoR and spatstat:
http://spatial-analyst.net/book/node/388
See also:
http://leg.ufpr.br/geoR/geoRdoc/vignette/geoRintro/geoRintrose8.html#x9-120008
I guess that covariates
Package StatDA has an option to generate a nort arrow (I am sure you
could easily replace this with any symbol you prefer):
Northarrow(Xbottom, Ybottom, Xtop, Ytop, Xtext, Ytext, Alength,
Aangle, Alwd, Tcex)
Here are some examples of publication ready maps:
-Original Message-
From: Pierre Racine [mailto:pierre.rac...@sbf.ulaval.ca]
Sent: Friday, February 05, 2010 4:49 PM
To: Tomislav Hengl; r-sig-geo
Subject: RE: [R-sig-Geo] Making web-repository of gridded maps: NetCDF or WKT
Raster?
Hi Tom,
I understand that PostGIS WKT Raster
Hi Christoph,
I have prepared few datasets of interest for testing geostatistical algorithms:
http://spatial-analyst.net/book/data-sets
I personally like the BCI (soil samples) dataset very much (used in the
spatstat package also). It has enough points and they are sampled at both short
and
-Original Message-
From: Dan Putler [mailto:dan.put...@sauder.ubc.ca]
Sent: Thursday, March 11, 2010 6:46 PM
To: hadley wickham
Cc: Tomislav Hengl; r-sig-geo@stat.math.ethz.ch
Subject: Re: [R-sig-Geo] Geocode for Bogota
I'm afraid Hadley is correct. Section 10.12 of Google Maps
Dear R-sig-geo,
FYI: I have just updated the small repository of publicly available data sets
of interest for global modeling/mapping that I have launched about a year ago.
This now contains 62 layers at resolution of 0.05 arcdegrees and with a
complete world coverage (it use to be 65S-65N
Quoting Francisco Alonso Sarria alons...@um.es:
Hi:
I'm begining to work with rsaga and saga compiled on ubuntu linux and I
have problems when I want to generate a grid from a point file (by the
way is the example of section 6.3.1 in Hengl's book A practical guide
to geoestatistical
I have started using the geosphere package kindly provided by Robert
Hijmans [http://cran.r-project.org/web/packages/geosphere/]. My
intention is to derive a global map of the air routes density using
the open access flight routes [http://openflights.org/data.html].
I have discovered
-sig-geo-
boun...@stat.math.ethz.ch] On Behalf Of Tomislav Hengl
Sent: Thursday, April 01, 2010 3:54 PM
To: r-sig-geo@stat.math.ethz.ch
Cc: caspar.hallm...@sovon.nl; bob.macmil...@wur.nl; 'Batjes, Niels'
Subject: [R-sig-Geo] Updated repository of worldmaps (300MB of data at 5km
resolution
Evann Smith wrote:
Hello,
I am attempting to calculate the mean value in a raster (3432 x 8640) for
each of 689 polygons (code at end of email). To that end, I have a few
questions:
First, the for loop runs fine for a while (2 hours, maybe) before
terminating itself and returning this error:
You should use the proj4 functionality implemented in the rgdal package.
This is what I get:
library(rgdal)
Geospatial Data Abstraction Library extensions to R successfully loaded
Loaded GDAL runtime: GDAL 1.7.0dev, released 2008/11/26
Path to GDAL shared files:
I think you want to use the kernel density funcionality of spatstat
[http://spatstat.org]; this will allow you to atach population at
polygon centers as weigths. Here are some examples:
library(spatstat)
...
wosCR.ppp - ppp(wos...@coords[,1], wos...@coords[,2],
marks=wosmap$CR,
Dear Johannes,
Looks like you are in the field of error propagation
[http://spatial-accuracy.org/workshopSUP].
Both mean and median are valid statistical parameters to describe the central
tendencies. What is often more interesting is the propagated uncertainty in the
final estimates. I
It is a pity that people that have provided this data did not attach
any metadata (see for example the simple metadata format I used to
prepare worldmaps e.g.
[http://spatial-analyst.net/worldmaps/globedem.rdc]).
My favorite places to look for correct proj4 strings (i.e. projection
Dear R-sig-geo,
Next week, we (Roger Bivand, Edzer Pebesma, Gerard Heuvelink, Olaf Conrad,
Markus Metz, Victor Olaya and I) will run the GEOSTAT 2010 summer school in
Plasencia, Spain. We have decided to open a live broadcast channel (sound and
screencasting + separate web-cams), and open
(Maybe this is not really suited for the R-sig-geo, but since we often
experience problems with loading and visualizing large data)
Has anyone yet used the Revolution R Entrerprise Version of R?
Apparently it fixes/reduces the problem of large data and has an
excellent GUI.
Hi Basile,
If you work with large data, then you should definitively consider using
SAGA GIS. Here are some examples:
--
# download gridded data:
download.file(http://geomorphometry.org/sites/default/files/volcano_maungawhau.zip;,
destfile=paste(getwd(),
Op 26-10-2010 9:17, Edzer Pebesma schreef:
On 10/26/2010 09:02 AM, eric.ja...@ujf-grenoble.fr wrote:
Hello,
I would like to know if there is a way to get the trend coefficents when
doing kriging with external drift. I would like to compare with the
coefficients that I can have when doing
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