Cross Product and Partitioned Filtering-Based Graham Convex Hull for Buoy Drifting Area Demarcating

Table 1

Geometric center of buoy.

Buoy name	Longitude	Latitude
1#	118°13′31″.5 E	38°51′32″.7 N
2#	118°13′19″.3 E	38°51′19″.9 N
3#	118°12′33″.4 E	38°52′06″.7 N
4#	118°12′21″.2 E	38°51′53″.9 N
5#	118°11′35″.3 E	38°52′40″.7 N
6#	118°11′23″.1 E	38°52′27″.9 N
7#	118°10′33″.8 E	38°53′16″.7 N
8#	118°10′21″.6 E	38°53′03″.9 N
9#	118°09′32″.3 E	38°53′52″.7 N
10#	118°09′20″.1 E	38°53′39″.9 N
12#	118°08′18″.5 E	38°54′15″.8 N
13#	118°07′21″.7 E	38°55′09″.3 N
14#	118°07′21″.5 E	38°54′49″.5 N