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 activ
On Wed, 8 Nov 2006, Wang, Hao wrote:
> Hi,
>
> How to dig out the code of the function of .spFindCG, which is used in the
> function
> Polygon.
It isn't exported from the sp namespace, so you need to access it within
the namespace:
sp:::.spFindCG
>
> I also wanna to know how to calculate t
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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