Spatial Analysis

I may put more information here, but for now, there's not much.

• To find the latitude and longitude of zip codes, try this U.S. census site.
• The R library mapproj provides a number of cartographic projections. The R library maps allows you to do mapping and the library mapsdata provides some additional data for the mapping. These can all be obtained from the comprehensive R archive (CRAN). However, be careful as the projected coordinates may not match standard projections; for more on this see my tip on this.
• If you need more projections the PROJ cartographic projections library provides a UNIX/Linux command-line tool as well as a C library.
• For making color image plots of two-dimensional data, see my tip on this.
• For doing space-time smoothing using gam() see my tip on this.
• For understanding the standard errors in some popular spatial smoothing functions in R, see my tip on this.

Keywords: spatial statistics, R, smoothing, standard errors, space-time, gam, image plots

Last modified: 6/23/07.