Hao:
The PBSMapping package has reasonably stratightforward polygon area
calculations.
In fact, I just assembled a tutorial on this topic on my Web site:
http://nceas.ucsb.edu/scicomp/GISSeminar/UseCases/PointPolyRegionsOfInterest/RPointPolyROIDemo.html
As an aside: here at NCEAS we are active R users and I am working to
post a series of geospatial data processing
tutorials for our residents. Stay tuned for more as soon as I can
produce them....
Regards,
Rick Reeves
Scientific Programmer
National Center for Ecological Analysis and Synthesis/ UC Santa Barbara
Wang, Hao wrote:
Hi,
How to dig out the code of the function of .spFindCG, which is used in the
function
Polygon.
I also wanna to know how to calculate the area of a polygon, and how could I
know if
there are intersections of boundary in a polygon?
Best regards,
Hao
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Rick Reeves
Scientific Programmer / Analyst
National Center for Ecological Analysis and Synthesis
UC Santa Barbara
[EMAIL PROTECTED]
www.nceas.ucsb.edu
805 892 2533
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