Community 3.3.6

[Elena Donovan]

Hi team,

I wonder if Correlator3D is able to perform a comparison map between 2 DEMS? if yes, please let me know where to run this process.

help is much appreciated.

[David Alamillo]

Hi Elena,

Sure Correlator3D requires two DEMs, which should be generated from two different image sets of
the same area. It performs a comparative analysis and determines in 3D the importance of changes.
The software outputs change detection results as a DEM with values corresponding to the
differences in elevation between the two DEMs.

To perform change detection, please follow these steps:
1. Select “Change detection…” in the “Tools” menu.
2. Specify the reference DEM (i.e. the DEM as it appears before changes) using the
corresponding drop-down menu.
3. Specify the comparison DEM (i.e. the DEM as it appears after changes) using the
corresponding drop-down menu.
4.Specify the detection range. This implies that only changes within that range (vertically)
will be detected.
5. Click on the “Process” button. Real-time feedback will be provided on the overall progress
of processing. Once the process is done, the change detection DEM will appear in the
main window.

[Elena Donovan]

Understood, David. it worked quite well, and the feature to add the changes to the mosaic works fine.

I will keep running our historical data against our newest survey.

Thanks,

Elena