Preprocessing Sentinel-2 with SNAP
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=Subsetting= | =Subsetting= | ||
| + | #Mark the file name of the resampled product from previous work step in '''Product Explorer'''. | ||
| + | #{{mitem|text=Raster --> Subset..}} | ||
| + | # Left click in the preview of the Specify product subset dialog. | ||
*Spatial subset | *Spatial subset | ||
| − | + | # In the Spatial Subset tab draw a box on the preview image and move it to your region of interest. | |
| + | # Make a note of the Pixel Coordinates and (Geogrphical) Geo Coordinates if you want to repeat this step with other acquisiton dates of the same tile. | ||
*Spectral subset | *Spectral subset | ||
| + | # In the Band Subset tab click ''Select none''' and then check only the multispectral Reflectance Bands B2,B3,B4,B5,B6,B7,B8,B8A,B11,B12. {{button|text=OK}} | ||
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=Write to permanent file= | =Write to permanent file= | ||
Revision as of 13:17, 25 October 2019
Contents |
Reading a Sentinel-2 tile
- Download a complete Sentinel-2 tile from ESA Open Access Hub.
- Start SNAP Desktop
- File --> Open Product...) Browse to the compressed Sentinel-2 zip file. Open) or drag and drop the zip file from Windows File Explorer into the SNAP Product Explorer tab.
- Click on the plus sign of the file name in Product Explorer. Unfold Metadata and Bands.
Displaying a Sentinel-2 tile
- Mark the file name in the Product Explorer. Right click Open RGB Image Window). In the Profile drop-down list select Sentinel 2 MSI False Colour Infrared. OK
Resampling
We resample the spatial resolution 20m bands to 10m.
- Raster --> Geometric Operations --> Resampling. Open the Resampling Parameters tab. Define size of resampled product: check by reference band from source product. Select B2 from drop down list. Run.
Subsetting
- Mark the file name of the resampled product from previous work step in Product Explorer.
- Raster --> Subset..
- Left click in the preview of the Specify product subset dialog.
- Spatial subset
- In the Spatial Subset tab draw a box on the preview image and move it to your region of interest.
- Make a note of the Pixel Coordinates and (Geogrphical) Geo Coordinates if you want to repeat this step with other acquisiton dates of the same tile.
- Spectral subset
- In the Band Subset tab click Select none' and then check only the multispectral Reflectance Bands B2,B3,B4,B5,B6,B7,B8,B8A,B11,B12. OK
