[R-sig-Geo] longest distance in a polygon

[Brian Menounos]

Hello,

I'm interested in determining the longest linear distance in an
irregular polygon (and potentially ones with internal holes) and
wondering if there is R code to accomplish this? My interest is to
develop an automated procedure to calculate the effective fetch for
lakes. In a GIS one can clip line coverage based on an irregular
boundary to accomplish this task. The PBSmapping function 'clipLines'
unfortunately only works with rectangles. 

Any help would be greatly appreciated.

Thanks in advance,

Brian Menounos

-- 
Brian Menounos, Assistant Professor
Geography Program
University of Northern British Columbia
3333 University Way 
Prince George, BC, VN2 3C5
email: menounos at unbc.ca
tel: (250) 960-6266
fax: (250) 960-6533
web: http://web.unbc.ca/~menounos/