Topographic Differencing


2 differencing tools available for dataset: Queenstown, Otago, New Zealand 2021. 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.
Learn more about topographic differencing