An Approach for Three-Dimensional Sectorization in the Terminal Area Based on Airspace Function

Table 1

Comparison of spatial elements with different side lengths.

Edge length (km)	The number of cells	The number of cells passed through by trajectories	The number of cells passed through by multiple clusters of trajectories
2.86	54140	2095	74
3.82	31000	1612	64
4.77	19900	1315	64