Please find below the call for papers for the 1st International Symposium on Applications of Constraint Databases (CDB'04). One of the aims of the Symposium is...
1235
Eleni Fitoka
Helenf@...
Oct 5, 2003 8:26 am
Dear list members, I would be grateful if you could suggest me any software (free domain preferable) to apply the "scale variance analysis" developed by...
1236
Holger Sandmann
hsandman@...
Oct 9, 2003 12:25 pm
Hi everyone: I have a high-res DEM (SRTM 3-arcsec) which has local 'blackouts'/'holes', and a low-res DEM (DTED0) of the same area, which is complete. Many of...
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Gregoire Dubois
aigeostats
Oct 9, 2003 12:25 pm
CALL FOR PAPERS Joint meeting of TIES 2004: The International Environmetrics Society and ACCURACY 2004: 6th International Symposium on Spatial Accuracy...
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cuartas oquendo carlo...
chcuartas11@...
Oct 10, 2003 2:39 pm
Hello I’m working with dataset discrete(countdown of foraminefera.) I want to know if the R software works with discrete spatial variable. Thank you very...
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Soeren Nymand Lophaven
snl@...
Oct 10, 2003 2:39 pm
Dear Carlos I think the geoRglm package written by Ole Christensen is what you are looking for, see Diggle, P.J., Moyeed, R.A. and Tawn, J.A. (1998). ...
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Dean Monroe
monroea@...
Oct 11, 2003 2:08 pm
Group: I am working on a project where we are looking at the local variance of crop density, by using a vegetative index (NDVI). The spot sensor readings are...
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Ursula Manns
ursula_manns@...
Oct 13, 2003 4:50 pm
Dear Community, I would like to share some thoughts with you: I studied some datasets concerning plant distribution in arable fields: I found first of all a...
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Isobel Clark
drisobelclark@...
Oct 13, 2003 4:50 pm
Ursula I think there are a few things you can try before you abandon all hope of kriging. Certainly if you have nugget effects which are more than (say) 2/3rds...
1243
rocchini@...
Oct 13, 2003 4:50 pm
I've made an interpolation by IDW, Spline and ordinary kriging and a cross-validation for all methods. When I make a regression between predicted and measured...
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Isobel Clark
drisobelclark@...
Oct 13, 2003 4:50 pm
Duccio There are many reasons why your interpolations may not be working. A few of these are: # you are beyond the range of influence of any distance...
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Russell Barbour
russell.barbour@...
Oct 16, 2003 7:22 am
Dear Dr. Rocchini: Well, my first reaction is that R squared is not an appropriate measure for correlated data. Secondly, such a large area may well have an...
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Peter Pinn
peterpinn@...
Oct 16, 2003 7:23 am
Hi again, after I got so much response to my questions concerning spaital interpolation comparison I want to present to you my conclusion: It seems to be a...
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Dean Monroe
monroea@...
Oct 17, 2003 8:03 am
Group: First, thanks to all who responded to my question of CV values and kriging. The insights were very helpful and have caused me to revise my procedure. I...
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Volker Bahn
lochapoka@...
Oct 17, 2003 8:03 am
Dear List members, What would be a good interpretation for the coefficient Rho in a conditional autoregressive (CAR) model? I have looked through the...
Hello, The subject of logs and back transforms has been discussed a great deal on the list and I've seen much material concerning back transforms following...
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Monica Palaseanu-Love...
monica.palaseanu-love...
Oct 20, 2003 10:37 am
Hi everybody, I am looking for literature in which is explained the usage of box- whisker plots for identifying outliers. I have Barnett and Lewis - Outliers...
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Pierre Goovaerts
goovaert@...
Oct 20, 2003 10:38 am
Hi Chris, The back transform of simulated values is very easy to perform. Just take the exponential of the simulated values since you are not trying to...
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Chris Lloyd
c.lloyd@...
Oct 20, 2003 3:14 pm
Hello, Many thanks to Isobel Clark and Pierre Goovaerts for sending replies to my email about simulation and back transforms. Both pointed out that in the case...
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Monica Palaseanu-Love...
monica.palaseanu-love...
Oct 20, 2003 3:14 pm
Hi Eric, Thanks for the link. It is exactly what i was looking for, and hopefully it will answer my questions. It is easy to do a boxplot in R .... but how we...
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Adrian Martinez Vargas
amvargas@...
Oct 21, 2003 8:05 am
How to simulate variables in block support? I need to simulate some variables in block support, as in block Ordinary Kriging. I work with GSLIB. How to do...
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Gisbert Schraud
Gisbert.Schraud@...
Oct 21, 2003 3:22 pm
Dear Listmembers, I'm dealing with hydraulic models. In our hydraulic model we have some orthogonal-profile-lines along a river. As a result of the model we...
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Isobel Clark
drisobelclark@...
Oct 21, 2003 3:22 pm
Adrian I am not totally familiar with gslib but if it doing proper block kriging, you should be able to simulate directly from those results. Much simpler (and...
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Marcelo Alexandre Bruno
marcelo2lei@...
Oct 23, 2003 7:20 am
Dear list-members I try to run geoR for generate interpolation maps. My data is: x(longitud, decimal degree),y(latitud, decimal degree),z(Sa, acoustic...
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Edzer J. Pebesma
e.pebesma@...
Oct 23, 2003 7:20 am
Marcelo, although I would like to wait for Paulo's comments, here are my two brief remarks: 1. if your data set is large, say over 3000 observations, and you ...
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Ernesto Jardim
ernesto@...
Oct 23, 2003 7:20 am
... Hi Marcelo, It's commom to run out of memory with R, in particular if you are using a version older than 1.4 (see man pages in that case). Also in versions...
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Martin Roseveare
martin_roseveare@...
Oct 27, 2003 8:32 am
Just to reinforce what Edzer said about projections - convert your longitude and latitude data into a planar projection first - UTM should be OK though check...
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Isobel Clark
drisobelclark@...
Oct 27, 2003 8:32 am
Martin ... Do you have an algorithm that works everywhere in the world? Isobel http://geoecosse.bizland.com/whatsnew.htm ...
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sebastiano trevisani
sebastiano.trevisani@...
Oct 27, 2003 8:32 am
Hello ai-geostats list-members Performing an universal kriging on chemical data (log transform of concentration), in some estimation points I obtained an...
