Gabor, sp provides a contour method for objects of class
SpatialGridDataFrame. I don't know how you should create a grid such
that contours are circles -- simplest to generate distances from
specific points. I don't know if there is easy way to do this right now;
a rather indirect way is to use
Using the classes and methods for spatial data in package sp, typically
the dem would be stored in a grid (SpatialGridDataFrame) and the vector
data in a SpatialPointsDataFrame. Then you can use the overlay method to
retrieve the dem values at point locations, to look at their relationship.
--
E
BUSINESS OFFER FROM ZIMPLANT
(PLATINUM MINERAL RESOURCES)
FROM PROF CY KIM
Reply email: [EMAIL PROTECTED]
My name is Prof CY Kim from South Korea, a Professor of Metallurgical engineering, a mineralogist , a project director and an agency with ZimPlats, the largest platinum company in Zimbabwe.
M
Hi members of the list
I am new to the R community (somewhat to the grass community also). I would
like to see if there is any correlation between vector data (polyline connected
to a db file) and classes from an analysis on a raster file. Namely I have an
underwater DEM (raster 4m resolution)
I am currently doing the following to draw circles at the
indicated distances from the center. The center is given
by utm coordinates: utm.e, utm.n . It does work:
class(im2) # "SpatialGridDataFrame"
image(im2, "ind", col = col$ct)
library(plotrix)
dd <- c(25, 50, 100, 150)
for(i in 1:4) draw.ci
On Tue, 6 Mar 2007, Tim Keitt wrote:
> Sounds like a good wiki-page. Is there a wiki for r-sig-geo?
No, no wiki. The R-geo site is maintained by me on a remotely editable
site, works pretty well, and material can be added if sent to me, but not
otherwise (we are grateful guests there). The mail
On Tue, 6 Mar 2007, zhijie zhang wrote:
> Dear friends,
> I can't find the functions in R to do the following tasks:
> 1. extract the coordinats of ploygon's center ;
The coordinate() method for a SpatialPolygons or SpatialPolygonsDataFrame
object returns the centroid of the largest member po
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Sounds like a good wiki-page. Is there a wiki for r-sig-geo?
THK
On 3/6/07, Gabor Grothendieck <[EMAIL PROTECTED]> wrote:
> Not sure if this will become an issue but in case I need
> it to justify my toolset does anyone have a list of
> recognizable organizations that use R for geographic
> proce
All of the partners in the intamap project (http://www.intamap.org/) do,
for example.
--
Edzer
Gabor Grothendieck wrote:
> Not sure if this will become an issue but in case I need
> it to justify my toolset does anyone have a list of
> recognizable organizations that use R for geographic
> proces
Not sure if this will become an issue but in case I need
it to justify my toolset does anyone have a list of
recognizable organizations that use R for geographic
processing?
Thanks.
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Thanks for the clarification.
On 3/6/07, Roger Bivand <[EMAIL PROTECTED]> wrote:
> On Tue, 6 Mar 2007, Gabor Grothendieck wrote:
>
> > Great! Your LL2UTM function was exactly what I wanted.
> >
> > My data sets are each about a city block in size and I mostly work
> > in UTM on this project but I
Dear friends,
I can't find the functions in R to do the following tasks:
1. extract the coordinats of ploygon's center ;
2. create Dirichlet tessellation and Delaunay triangulation for a set of
points
sp,spdep,tripack,et al, seem not to be able to finish it.
If u know how to do it, please let m
On Tue, 6 Mar 2007, Gabor Grothendieck wrote:
> Great! Your LL2UTM function was exactly what I wanted.
>
> My data sets are each about a city block in size and I mostly work
> in UTM on this project but I do get a few points in lat long. Its small
> enough that I have been using that web site I
Thanks. Looking at ?convUL I see that it also has the
capability of automatically determining the zone. My
zone is fixed so its not a consideration but I will
keep it in mind.
Currently I am using rgdal so Roger's solution
lets me keep within my current framework but I
will check out PBSmapping
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A SNOW AND BLOWING SNOW ADVISORY MEANS THAT VISIBILITIES WILL BELIMITED
DUE TO A COMBINATION OF FALLING AND BLOWING SNOW.
A SNOW AND BLOWING SNOW ADVISORY MEANS THAT VISIBILITIES WILL BELIMITED
DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. IF YOU ARE TRAVELING,
MAKE SURE YOUHAVE EXTRA GLOV
$B?FM'$NKe$O!"K\Ev$KH~?M$J$s$G$9!#(B
$B6;$bBg$-$$$7!"4i$b(B $BCf?9(B $BL@:Z(B $B$K;w$F$k$s$G$9!#(B
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Wie geht's dir Felix,
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Great! Your LL2UTM function was exactly what I wanted.
My data sets are each about a city block in size and I mostly work
in UTM on this project but I do get a few points in lat long. Its small
enough that I have been using that web site I mentioned but it gets
tedious after a while and this shou
Gabor,
I've used convUL in the PBSmapping package to convert from UTM to
lat/lon for some weather data I was playing with. It will also convert
from lat/lon to UTM (I haven't tried that direction though).
Here's the code I used:
library(PBSmapping)
subs = read.csv("ngrid/SubAsPoints.csv",
On Tue, 6 Mar 2007, Gabor Grothendieck wrote:
> Thanks. I looked at spTransform prior to posting but don't understand it.
> What I want is to create a function that returns UTM coordinates:
>
> LL2UTM <- function(lat, long, zone = 18) {
> ...
> }
library(rgdal)
LL2UTM <- function(lat, long, zone
On 3/6/07, antonio rodriguez <[EMAIL PROTECTED]> wrote:
> Gabor Grothendieck wrote:
> >> I am currently using this web page to convert LL to UTM (and UTM to LL).
> >>
> >>http://home.hiwaay.net/~taylorc/toolbox/geography/geoutm.html
> >>
> >> All my points are in zone 18. How would I accomplis
Thanks but I think it would be overkill to use a GIS simply to convert
coordinate systems of a few points. Everything else I want to do can
be done in R.
On 3/6/07, Thomas Adams <[EMAIL PROTECTED]> wrote:
> Gabor,
>
> You *may* be able to accomplish this using R easily (I'm sure it's
> doable), bu
Gabor Grothendieck wrote:
I am currently using this web page to convert LL to UTM (and UTM to LL).
http://home.hiwaay.net/~taylorc/toolbox/geography/geoutm.html
All my points are in zone 18. How would I accomplish the same
thing using R?
Thanks.
Within GRASS there is an Addon: utm_wh
Thanks. I looked at spTransform prior to posting but don't understand it.
What I want is to create a function that returns UTM coordinates:
LL2UTM <- function(lat, long, zone = 18) {
...
}
If necessary, zone=18 can be hardcoded in the function and that
arg removed.
I assume that using spTransfor
Gabor,
package rgdal provides an interface to the PROJ.4 library for projection
of geographical data. Look for the function (or rather method)
spTransform. It takes any of the spatial classes provided by package sp,
and afaik any of the known projection systems, including UTM and
ellipsoids (L
Gabor,
You *may* be able to accomplish this using R easily (I'm sure it's
doable), but I'm do not know how to do the conversion. I would suggest
as an alternative to do your work using GRASS GIS
(http://grass.itc.it/). R interfaces very well with GRASS and making
your LL to UTM conversion (and
I am currently using this web page to convert LL to UTM (and UTM to LL).
http://home.hiwaay.net/~taylorc/toolbox/geography/geoutm.html
All my points are in zone 18. How would I accomplish the same
thing using R?
Thanks.
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