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Computation window for Terrain Ruggedness Index values

his figure illustrates the computation window used when calculating the Terrain Ruggedness Index (TRI) value for a grid cell. For the Area TRI, the computation includes the grid cell of interest, i, and its eight adjacent, neighboring grid cells.

This figure illustrates the computation window used when calculating the Terrain Ruggedness Index (TRI) value for a grid cell. For the Area TRI, the computation includes the grid cell of interest, i, and its eight adjacent, neighboring grid cells. For the Road TRI, the computation includes the grid cell of interest, i, and the adjacent, neighboring grid cells in which a road is present.

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