Hi Everyone,
Sorry folks, my email program, Netscape Communicator, cannot send text
email correctly. So this attempt goes out in both html and text.
I have a nice solid SpatialPologonsDataFrame and a new line file
(wkbLineString) called "major roads.shp".
MY QUESTIONS. I would appreciate exam
I have a nice solid SpatialPologonsDataFrame and a new line file
(wkbLineString) called "major roads.shp".
MY QUESTIONS.
*I would appreciate examples of*
*a)How to merge the intersection of a **SpatialPologonsDataFrame and a
wkbLineString **
b)How to plot the result
c)How to display the s
Dear Tom,
Actually, R complains about duplicate points. I'm pretty sure some
restaurants are really close to each other, or perhaps in the same building.
Could be some geocoding errors as well. If I were to 'wiggle' the data,
would this be dependent on the resolution of the dataset? I'm still figu
Dear Nicholas,
But from your description, it seems like there might be other questions
> that should guide your analysis.
> Context should drive your exploration of the data.
>
The most important context is the user's current location in my case since
I'm researching the usefulness of SDA for Loc
Dear Virgilio,
Interesting problem. Let me know if you need help collecting data. ;)
Thanks :) Actually, I'm busy with developing a Location-Based Service (a
restaurant finder to be precise) utilising SDA. The goal of my research is
to integrate SDA in an LBS. For this purpose, I've gathered abo
Michael,
Although your points might seem cluttered (are there reasons to believe that
they shouldn't be?), you should still check what your spatial resolution is,
and if there are several restaurants occupying the same coordinates - in that
case, only the first one will be considered on import. I
Dear Roger,
it works now, many Thanks!
Timo
-Ursprüngliche Nachricht-
Von: Roger Bivand [mailto:roger.biv...@nhh.no]
Gesendet: Sonntag, 15. Februar 2009 23:00
An: Timo Mitze
Cc: r-sig-geo@stat.math.ethz.ch
Betreff: Re: AW: [R-sig-Geo] SpatialFiltering in spdep: How to create an 'nb'
o
1st call: GEOSTAT 2009 Summer School
"Spatio-temporal data analysis with R + SAGA + Google Earth"
Period: 3 10 May 2009
Location: Mediterranean Institute For Life Sciences (MEDILS), Split, Croatia
The objective of the GEOSTAT Summer School is to promote use of open source
tools for the analy
Hi,
Yes, if you need help rating restaurants, put me in your grant too :-)
Seriously, there are many ways to skin a cat. I don't think cartograms
will help you much
in this particular case. If you have data besides your point pattern, eg
postal codes, census data,
zoning, ... You could look for the
Hi,
Could you provide us with some reproducible code? In addition, look at
the output of traceback() to get more info on what exactly went wrong.
cheers
Paul,
Wesley Roberts wrote:
Hi Paul,
I have managed to get the code to run and have figured out what the function
does. Many thanks, it s
Hi Paul,
I have managed to get the code to run and have figured out what the function
does. Many thanks, it should do exactly what I need. Unfortunately I have now
run into another problem. The code appears to run properly until the error
below appears.
.
.
.
.
60963 (-76170.4, -3300950) 20.06
Hi,
If you want to use the standard convex hull of automap, just omit the
new_data argument. That will stuff 5000 points into the convexhull on a
regular grid. If you want to specify the pixelsize you need to adapt the
create_new_data function like this:
create_new_data = function(obj) {
# F
Hi,
On 2/2/2009 3:10:07 AM, you were invited to join srinivasa
raghavan's UNYK address book so he/she would always have access to your contact
info and you to his/hers.
To accept his/her request, Click here.
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Excellent, that will help alot. I have the newest version of automap and am
running an experiment now.
Just to confirm I need to omit the statement 'grd(new_data argument)' which in
my case is 'gridded(grd) <- TRUE'. That way the resolution is defined in
x.range <- . and y.range <- . s
Hi,
A convex hull should do the trick, if you have the latest automap
version (>0.5-2) you don't have do to anything to get a convex hull.
Just omit grd (new_data argument) and automap will automatically use a
convex hull.
cheers,
Paul
Wesley Roberts wrote:
Hi Paul,
Many thanks for the re
Hi Paul,
Many thanks for the reply. I am not sure about the convex hull approach as I am
not sure how to implement it as part of my program. Is the code you wrote below
replacing the following statements? Would I then pass grd to the autoKrige
statement as shown in the original code below?
***
...in addition:
You could also use AcrGIS, QGis or another GIS package to make a polygon
that delineates the areas in which you want to interpolate. You can then
use spsample() like I showed you in the previous mail. Making this
polygon can also be done in R using spplot and grid.locator, if y
Hi Wesley,
You could take a look at using a convex hull. I'm not sure if this will
fix your problem as we cannot see how exactly your points are irregular.
The latest version on my website (0.5-2) uses a convex hull off the data
if you don't pass a new_data object. You could try this. The func
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