A New Skeleton Feature Extraction Method for Terrain Model Using Profile Recognition and Morphological Simplification

Table 1

Contrast of segments between PPA and MPPA.

DEM data	Number of segments		Simplification ratio
	PPA	MPPA
ex100	8032	1968	75.50%
ex200	41374	11876	71.30%
L1T7	16208	6138	62.13%
L1T15	22928	12405	45.90%
L1T16	23608	8687	63.20%