SAR flood mapping with SNAP
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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 heavy rainfall and floods occur. | 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 heavy rainfall and floods occur. | ||
| − | = Data transfer = | + | =Data transfer= |
| − | Download example tutorial data from Nigeria or data from your personal region of interest: two Sentinel-1 scenes one | + | 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]]. |
| − | = Subsetting = | + | Use VV polarization, Product type GRD |
| + | =Subsetting= | ||
Open SNAP Desktop. | Open SNAP Desktop. | ||
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 anfd geometric calibration = | + | =Radiometric anfd geometric calibration= |
| − | = Stacking and | + | =Stacking and |
[[Category:SNAP Tutorial]] | [[Category:SNAP Tutorial]] | ||
[[Category:Tutorials]] | [[Category:Tutorials]] | ||
Revision as of 15:20, 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 heavy rainfall and floods occur.
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.
Radiometric anfd geometric calibration
=Stacking and
