SAR flood mapping with SNAP
(→Radiometric anfd geometric calibration) |
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Drag and drop the zip files of the Sentinel-2 scenes into the TOC. | Drag and drop the zip files of the Sentinel-2 scenes into the TOC. | ||
We need to reduce the amount data by subsetting the large Sentinel-1 scenes. | We need to reduce the amount data by subsetting the large Sentinel-1 scenes. | ||
| − | =Radiometric | + | =Radiometric and geometric calibration= |
| − | = | + | =Change composite= |
[[Category:SNAP Tutorial]] | [[Category:SNAP Tutorial]] | ||
[[Category:Tutorials]] | [[Category:Tutorials]] | ||
Revision as of 15:22, 3 December 2019
In this tutorial we will use Level-1 Ground Range Detected (GRD) Sentinel-1 data downloaded from the Copernicus Open Access Hub. The example data is from a study area in Nigeria near the city of Lokoja in Kogi province near the junction of the two large rivers Niger and Benue. During the westafrican monsoon April - September heavy rainfall and floods occur.
Contents |
Data transfer
Download example tutorial data from Nigeria or data from your personal region of interest: two Sentinel-1 scenes one pre-event acquisition date and one post-event date: Downloading Sentinel-2 images. Use VV polarization, Product type GRD
Subsetting
Open SNAP Desktop. Drag and drop the zip files of the Sentinel-2 scenes into the TOC. We need to reduce the amount data by subsetting the large Sentinel-1 scenes.
