Hi you all, I am studying the spatial overlap between two species. I want to: - Determine the spatial distribution of each of the two species using a geostatistical approach by estimating the variogram and then apply the kriging and/or cokriging. - Use the estimates predicted for each species to determine the ratio, to evaluate de spatial distribution of the ratio estimates and then obtain the overlap degree. My questions are: 1 ? What are the procedures that you recommend to test if the process is stationary? I just assumed that the process is stationary? 2 - In my work there is clear east-west anisotropy. My questions regarding this are: i) Is there any test to evaluate its significance other than graphically? ii) Being a strong anisotropy it is more advisable to study the spatial distribution, of the variable under study, in that direction? 3- Are there any cases where the Simple Kriging is more advisable than the other forms of Kriging? 4- Besides Cross-validation residual and Cross validation z-scores, are there any test to evaluate the adequacy of different models? Is there any coefficient like AIC criterion to evaluate and choose the best-fitted model between several models or the decision is mainly done by graphical analysis? 5- Which is the package in R more fit to my study? geoR or gstat? Thanks a lot for your help, Best regards, Nuno Veiga -- View this message in context: http://r-sig-geo.2731867.n2.nabble.com/Spatial-Analysis-Doubts-tp7581802.html Sent from the R-sig-geo mailing list archive at Nabble.com.
Spatial Analysis Doubts
1 message · Nuno