Differencing

Video Tutorials

Data Access via OpenTopography

Accessing USGS 3DEP data on OpenTopography: Access the USGS 3DEP dataset on OpenTopography. Currently, this service is limited to US academics and OT+ subscribers.
Accessing global topography data: Access global and regional topographic data, including SRTM and ALOS, and download DEMs and visualizations.

New raster-based vertical differencing tool

By Chelsea Scott

Topographic differencing: Earthquake along the Wasatch fault

The National Association of Geoscience Teachers (NAGT) ranked this exercise as 'exemplary' and host it here.

On-Demand 3D Topographic Differencing

By Chelsea Scott

Topographic Differencing Showcase

OpenTopography recently released on-demand vertical differencing. Here, we showcase a range of anthropogenic, geomorphic, and tectonic processes imaged using topographic differencing on OpenTopography’s portal. In each image, erosion or downward change of the Earth’s surface is colored in red, while deposition or upward change is colored in blue. We include a link to the change detection page for each dataset pair so you can run your own jobs and explore.

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