


I’ve been teaching and using R (and S-PLUS) for a couple of decades, and using its spatial libraries for about half of that, but i still get confused by the various ‘geographically-aware’ data objects that are supported. Although Bivand’s Spatial.html page is quite helpful, I wonder is there a ‘bestiary’ that outlines (perhaps in some kind of tree format?) what they are, what geometries are represented, which libraries create or support them, etc.? 

Lee De Cola, PhD, MCP. 
DATA to Insight 
LDECOLA@COMCAST.NET 
Reston, Virginia 
703 709 6972 
571 315 0577 mobile 

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