Viewshed Analysis

Terrain profile and line of sight

From observation point O only points A and C are visible. The line of sight between the observer and B ,D is obstructed by the terrain

3D comparison

Animation

Different observer positions

Horizon Profile

Broadcasting Vectorization

^{p0 (3,)
[2.5 6.5 5.5]

t (5, 1, 1)
┌─────┐┌──────┐┌─────┐┌──────┐┌─────┐
[0.0] [0.25] [0.5] [0.75] [1.0]
└─────┘└──────┘└─────┘└──────┘└─────┘

X,Y,Z (3, 4)
┌─────────┐┌─────────┐┌─────────┐
[1 1 1 1] [4 5 6 7] [3 2 5 4]
[2 2 2 2] [4 5 6 7] [4 3 5 6]
[3 3 3 3] [4 5 6 7] [6 2 4 6]
└─────────┘└─────────┘└─────────┘

Xlos (5, 3, 4)
┌─────────────────┐┌─────────────────────────┐┌─────────────────────┐┌─────────────────────────┐┌─────────────────┐
[2.5 2.5 2.5 2.5] [2.125 2.125 2.125 2.125] [1.75 1.75 1.75 1.75] [1.375 1.375 1.375 1.375] [1.0 1.0 1.0 1.0]
[2.5 2.5 2.5 2.5] [2.375 2.375 2.375 2.375] [2.25 2.25 2.25 2.25] [2.125 2.125 2.125 2.125] [2.0 2.0 2.0 2.0]
[2.5 2.5 2.5 2.5] [2.625 2.625 2.625 2.625] [2.75 2.75 2.75 2.75] [2.875 2.875 2.875 2.875] [3.0 3.0 3.0 3.0]
└─────────────────┘└─────────────────────────┘└─────────────────────┘└─────────────────────────┘└─────────────────┘

Ylos (5, 3, 4)
┌─────────────────┐┌─────────────────────────┐┌─────────────────────┐┌─────────────────────────┐┌─────────────────┐
[6.5 6.5 6.5 6.5] [5.875 6.125 6.375 6.625] [5.25 5.75 6.25 6.75] [4.625 5.375 6.125 6.875] [4.0 5.0 6.0 7.0]
[6.5 6.5 6.5 6.5] [5.875 6.125 6.375 6.625] [5.25 5.75 6.25 6.75] [4.625 5.375 6.125 6.875] [4.0 5.0 6.0 7.0]
[6.5 6.5 6.5 6.5] [5.875 6.125 6.375 6.625] [5.25 5.75 6.25 6.75] [4.625 5.375 6.125 6.875] [4.0 5.0 6.0 7.0]
└─────────────────┘└─────────────────────────┘└─────────────────────┘└─────────────────────────┘└─────────────────┘

Zlos (5, 3, 4)
┌─────────────────┐┌─────────────────────────┐┌─────────────────────┐┌─────────────────────────┐┌─────────────────┐
[5.5 5.5 5.5 5.5] [4.875 4.625 5.375 5.125] [4.25 3.75 5.25 4.75] [3.625 2.875 5.125 4.375] [3.0 2.0 5.0 4.0]
[5.5 5.5 5.5 5.5] [5.125 4.875 5.375 5.625] [4.75 4.25 5.25 5.75] [4.375 3.625 5.125 5.875] [4.0 3.0 5.0 6.0]
[5.5 5.5 5.5 5.5] [5.625 4.625 5.125 5.625] [5.75 3.75 4.75 5.75] [5.875 2.875 4.375 5.875] [6.0 2.0 4.0 6.0]
└─────────────────┘└─────────────────────────┘└─────────────────────┘└─────────────────────────┘└─────────────────┘

Zter (5, 3, 4)
┌─────────────────────┐┌──────────────────────────────────┐┌──────────────────────────┐┌────────────────────────────────┐┌────────────────┐
[5.25 5.25 5.25 5.25] [4.625 5.015625 5.296875 5.578125] [3.31 4.43 5.125 5.375 ] [2.75 3.359 4.96875 4.78125 ] [3.0 2.0 5.0 4.0]
[5.25 5.25 5.25 5.25] [4.375 4.796875 5.140625 5.484375] [3.25 4.25 5.0625 5.6875] [3.39 3.625 5.015625 5.859375] [4.0 3.0 5.0 6.0]
[5.25 5.25 5.25 5.25] [4.125 4.578125 4.984375 5.390625] [2.75 3.75 4.6875 5.5625] [3.48 2.875 4.359375 5.765625] [6.0 2.0 4.0 6.0]
└─────────────────────┘└──────────────────────────────────┘└──────────────────────────┘└────────────────────────────────┘└────────────────┘

┌─────────────────────────┐┌─────────────────────────┐┌─────────────────────────┐┌─────────────────────────┐┌─────────────────────────┐
[False False False False] [False True False True ] [False True False True ] [False True False True ] [False False False False]
[False False False False] [False False False False] [False False False False] [False False False False] [False False False False]
[False False False False] [False False False False] [False False False False] [False False False False] [False False False False]
└─────────────────────────┘└─────────────────────────┘└─────────────────────────┘└─────────────────────────┘└─────────────────────────┘

┌─────────────────────────┐
[False True False True ]
[False False False False]
[False False False False]
└─────────────────────────┘

┌─────────────────┐
[3.0 nan 5.0 nan]
[4.0 3.0 5.0 6.0]
[6.0 2.0 4.0 6.0]
└─────────────────┘}