Dear list, A brief and (hopefully) simplistic question regarding point pattern analysis.
We have compiled a large, continental database of chemical burdens in a model organism. Currently, the data span 40 years and covers the entire country of Canada (including the high arctic). We have categorized the numeric data into categorical data (i.e. categorical marks) based on risk thresholds. We'd like to assess whether or not there are interesting spatial patterns ( i.e. clusters of levels of risk (high vs low)), much like a case/control approach. My question is as follows; Is there a "best" geographic projection for this approach? Currently all data are in Latitude/Longitude. My inclination is to use something along the lines of an equal area projection to maintain a reasonable representation of spatial dispersion. -- David Depew Postdoctoral Fellow School of Environmental Studies Queen's University Kingston, Ontario K7L 3N6 david.de...@queensu.ca P: (613) 533-6000 x77831 [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo