Damage proxy maps#

Damage proxy maps based on coherence change detection

This module provides a fully-automated workflow for the creation of damage proxy maps based on the method of coherent change detection (CCD) with Sentinel-1 SLC data, as described by Tay *et al.* (2020).

The output data files consist of the damage proxy map as GeoTiff (dmp_…tif) and KMZ (dmp_…kmz) files, as well as the raw CCD values in GeoTiff (CCD_…tif) and GeoJSON (CCD_…geojson) formats.

The files are found within a newly created folder. The folder name is based on the name of your AOI and the event date.

Attention

Minimum requirements:

  • m16 instance (16 CPU and 64 GB RAM)

  • 50 GB of free disk space

The two steps of the process are explained in the following section.

Select an AOI#

Using the provided AOI selector, select an AOI of your choice between the different methods available in the tool. We provide three administration descriptions (from Level 0 to Level 2) and three custom shapes (drawn directly on the map or OGR-compatible files).

https://raw.githubusercontent.com/sepal-contrib/damage_proxy_maps/main/doc/img/aoi_select.png

AOI selector#

Parameters#

  • Disaster event date: Pick the date where the disaster event happened.

  • Copernicus credentials: Provide your Sci-Hub credentials for search and download of the relevant Sentinel-1 scenes. If you do not have an account, register with Copernicus Sci-Hub.

Selecting this button will trigger the full workflow (Note: Some of the steps may take a while, such as downloading and processing, so if you have an unstable internet connection, set the minimum runtime of your instance to two hours; otherwise, stay connected to the SEPAL website by neither closing your browser or browser tab.)

Note

If the processing does not finish, you can rerun the module with the same parameters, and the processing will continue from where it stopped.

Once the computation is finished, the result files will be stored in the module_results/Damage_proxy_map/<aoi name>_<event date>/ folder.

https://raw.githubusercontent.com/sepal-contrib/damage_proxy_maps/main/doc/img/complete.png