Topographic Differencing
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2 differencing tools available for dataset: Marlborough, New Zealand 2020-2022. Please select a tool for differencing high resolution topography:
Vertical Differencing (start with point cloud): Start Differencing
Description: Subtraction of DEMs generated on-demand from point clouds. This tool is slower than the raster option, but users can select a subset of point classifications (for example, ground points). Applications: Geologic and anthropogenic processes including river erosion and deposition, earthquakes, volcanic eruptions, deforestation, and urban growth.
3D Differencing: Start Differencing
Description: Calculation of the 3D displacement field using a windowed implementation of the Iterative Closest Point (ICP) algorithm. Applications: Surface rupturing earthquakes, creeping landslides, or other processes where the landscape shifts laterally.