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A Slight Shift

SARscape Analytics Displacement Mapping

Megan Gallagher

This is the fourth blog in a series that highlights one of the easy-to-use tools in the new ENVI SARscape Analytics. The first three blogs in this series featured videos about the Time Series tool, the Flood Mapping tool, as well as the Persistent Scatterers (monitoring displacement) tool. ENVI SARscape Analytics was designed to make it quick and easy for those that may not be SAR experts to utilize SAR data for some of the most common applications.

This blog looks at the DinSAR, or Displacement Mapping, tool. This tool allows you to take two SAR images from before and after an event, and calculate the change in the ground surface that has occurred. On July 21, 2020, an earthquake struck the state of Alaska, USA. It was a magnitude 7.8 earthquake, and caused minor damage in the town of Sandpoint, Alaska. It also triggered a tsunami warning. The video in this blog highlights how SAR data from before and after the earthquake can easily be processed and analyzed with the DinSAR tool to show the effects of the earthquake.