SimActive Community

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.

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.

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