Tg. Gregoire et Ht. Valentine, A SAMPLING STRATEGY TO ESTIMATE THE AREA AND PERIMETER OF IRREGULARLYSHAPED PLANAR REGIONS, Forest science, 41(3), 1995, pp. 470-476
The length of a randomly oriented ray emanating from an interior point
of a planar region can be used to unbiasedly estimate the region's ar
ea and perimeter. Estimators and corresponding variance estimators und
er various selection strategies are presented.