0 Sea or coastal area exposed to the open sea |
0,003 |
1 |
I Lakes or flat and horizontal area with negligible vegetation and without obstacles |
0,01 |
1 |
II Area with low vegetation such as grass and isolated obstacles (trees, buildings) with separations of at least 20 obstacle heights |
0,05 |
2 |
III Area with regular cover of vegetation or buildings or with isolated obstacles with separations of maximum 20 obstacle heights (such as villages, suburban terrain, permanent forest) |
0,3 |
5 |
IV Area in which at least 15 % of the surface is covered with buildings and their average height exceeds 15 m |
1,0 |
10 |