Dear list members: I'm doing my PhD about forestry soils and I use Idrisi 3.2 for my geostatistical analysis with Gstat interface. I do Ordinary Kriging and ...
Friends of AI-GEOSTATS I had a simple question regarding ordinary kriging. When dealing with clustered data (either 2D or 3D) with various interpolation ...
I would like to bring to the attention of the Ai-geostats community the availability of an improved version of the CrimeStat spatial statistics program. The...
Dear list members, I have calculated the shared edges existing between each of the cover types (nine in this particular case) of a vector map. My objective is...
hey folks, dunno if this is the right audience but, i've got some questions re fragstats 3.1: i'd like to run a contagion-esque metric on a single class in my...
Hello. I am using magnetic techniques to locate potential unexploded ordnance (UXO) and would like to apply IK to map the likelihood of UXO. Confirmed...
Hi. I want to use Ordinary Kriging on an arbitrary dataset of X,Y, and Z values to estimate the Z values on a grid of arbitrary size/density. But I don't know...
Dear all, I am working on an autologistic spatial lattice model (binary response data, neighbor matrix, and one explanatory variable) and would need help in...
Hello, I have a question about the variogram model of normal scores to use as input in the sequential gaussian simulation: the sill must be 1? and if this is...
Hi, I just wanted to share some of the responses to my question about substituting a user-defined distance matrix into a program for variogram calculation and...
On 6/26/02 guajaman@... posted the following message: I need information about the aplications of geostatistics in geological risk. I need to know If...
I have a question on the estimates of an spatial error model (SEM). The parameters in the OLS with the presence of spatial dependence in the error term will...
Dear Olaf - I wonder whether you got any response! Regards, Subhash ____________________________________________________________ Dr Subhash Chandra Senior...
Hi all list member Suppose that our data have an anisotropy in which sill varying with direction. In this case, what can talk about stationary: - Are data...
Greetings! I'm trying to put together a discussion on the issue of identifying "appropriate" spatial weighting functions in an empirical setting. Can anyone...
Dear list members
Thanks to everybody (P. Kyriakidis, J. Senegas, D. Myers, W. Thayer) who
answered my question about generating
autocorrelated random fields....
Hi, I'm looking for software or a script(Mathcad, Splus, SAS, etc.) for variogram estimation and kriging that can be easily altered to accept a user-defined...
Dear all, I asked recently about resources on the internet (online tutorials, collection of related links) & books about geostatistics in foreign languages. I...
Dear list members, I am dealing with modelling of spatial variability of biodiversity and its relation to spatial pattern of antropic influence. However,...
Dear all, One week ago, I asked a question about the requirement of normal distribution in statistics. The problem is that in most cases, the data sets we are...
Hi everybody I'm writing a diploma thesis about error propagation in digital terrain models and I want to use monte carlo methods to simulate elevation errors ...
I have do these question a log time ago, but I lost the answer. How to get the information that gave GSLIB90 after executed that look like these: ROTCOORD...
Din One of the things you need to consider is whether you want to test the mean of the whole population or of a specific area in space. The 'population' in...
Hi, all: I would appreciate your comments on following approach: Suppose that I have n data points s(l), l =1,..n. If I like to test whether the mean is zero,...
Dear all, I would like to put a few links on the AI-GEOSTATS web site to good tutorials & books about geostatistics & spatial statistics that are not written...
Short answer is yes to everything. middle length answer is that Normality is not required for anything except where it is a basic assumption - such as in...
Dear (geo_)statisticians in the list: I'm quite often confused with the requirement of "normal distribution" in (geo)statistics. My question is: When the...
Hi Isobel Clark Thank you for replying I am not worry for "different sill in differnet direction". Because I have an anisotropic variogram model, and want to...
