Fig. 4

Terrain features of the analysis areas. a Terrain height and the D04 areas in D03. Red boxes denoted as A, B, and C are the analysis areas. The terrain height in the area A (b) at the 1-km grid spacing in D03 and (c) at the 200 m grid spacing in D04. d The frequency distribution of terrain height in the area A (left) at the 1 km grid and (right) at the 200 m grid. e, f, g The same as (b, c, d) except for the area B. h, i, j The same as (b, c, d) except for the area C