Displaying 9 results from an estimated 9 matches for "georeferenced".
2011 Dec 20
0
trends for georeferenced spatial global grid
Hello,
There is a task to derive a linear trend, for ex. 5 units/month for
values located at the georeferenced global latidute-longitude grid.
There are several grids corresponding to time steps, say for a month
with 6 hour interval.
Sure, one can create a loop and derive a trend value for each data point.
Is there a better practice for this task to express it in a line or
two or a dedicated package?
Than...
2008 Oct 13
2
Using an image background with graphics
I would like to use a map or aerial photo as a background to plotting
solid lines and text, and semi-transparent color contours, in base and
lattice graphics. Plot coordinates need to be consistent with the
georeferenced background. For example, a color contour plot would have
an gray-toned aerial photograph as a background for overprinted
semi-transparent color contours of some spatially dependent variable.
Can anyone point me in the right direction on how to do this?
Thanks,
Scott Waichler
Pacific Northwest Nat...
2012 Dec 10
1
Creating a geographical grid
I would like to create a geographical grid to have a sort of a reference grid for my georeferenced survey data. The grid should be in a xy format, wgs1984 with a 0.025 degree, alternatively 10km, resolution covering -14 to -24 S and 24 to -34 E (Zimbabwe).
Additionally I need to be able to export it as a .dbf
Hope someone can help an R- novice !
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2008 Oct 09
1
GWR Predictions' standard deviation
Dear all,
I would like to use a GWR model in order to spatially predict food
insecurity in Africa. I have a georeferenced village data-bases and I've run
a "classic" regression model (taking into account the spatial dependence of
the errors) that works fairly well for Niger that is a quite homogenous
country. Now, I would like to make the same thing for countries where it
should be some heterogeneity in...
2006 Jul 01
1
nlme: correlation structure in gls and zero distance
Dear listers,
I am trying to model the distribution of fox density over years in the
Doubs department. Measurements have been taken on 470 plots in March
each year and georeferenced. Average density is supposed to be different
each year.
In a first approach, I would like to use a general model of this type,
taking spatial correlation into account:
gls(IKAfox~an,correlation=corExp(2071,form=~x+y,nugget=1.22),data=renliev)
but I get
>
gls(IKAfox~an,correlation=corExp(...
2007 Apr 04
6
transition matrices
I am working with transition matrices of sequences of animal
behaviours. What I would like to do is parse the original matrices,
adjusting row/column order so that the matrix has its main values in blocks
surrounding the diagonal. This would cause behaviours involved in
functional groupings (e.g. grooming, resting, foraging etc) to appear as
blocks.
This can be done manually by applying
2007 Mar 03
1
R software to place points on Yahoo maps
Is there any R software that create an image from Yahoo maps together
with points of known UTM coordinates (or lat/long marked? Note that
my region of interest is not covered in sufficient detail by Google maps.
It actually does not have to be Yahoo maps as long as it has sufficient
coverage of my region but that's the one I have found with coverage of
my region. The scale I am interested in
2007 Aug 27
0
Monmonier algorithm
...> Economics and Business Administration, Helleveien 30, N-5045 Bergen,
> Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
> e-mail: Roger.Bivand at nhh.no
Basically, Monmonier algorithm aims at finding maximum-difference
boundaries between geo-referenced objects. It requires a set of
georeferenced objects along with matrix of distances among these objects.
Monmonier algorithm is now implemented in the adegenet package
(http://pbil.univ-lyon1.fr/software/adegenet/). Main functions are
'monmonier' and 'optimize.monmonier'. Despite the package is devoted to
genetic data ana...
2009 Aug 12
1
Map of UK Counties - to use in R
Hi,
Can anyone help me with either of these:
1) Map of the UK counties that I could use in R?
2) How could I use an existing map for example, a map from here
http://www.itraveluk.co.uk/maps/england.html - in R. I need to use a UK map
to plot locations on it by lat & long.
Would appreciate help on any of these.
Thanks,
Raoul
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