Water Detection with the Normalized Difference Water Index
NDWI is a common index for detecting water where NDWI = (Green-NIR) / (Green+NIR). NDWI is sensitive to changes in liquid water content of vegetation canopies.
Gao, B.C., 1996. NDWI—A normalized difference water index for remote sensing of vegetation liquid water from space. Remote sensing of environment, 58(3), pp.257-266.
Head to the ODC Sandbox (click here) and login with GitHub Open Authorization.
Open the /examples folder.
Open and run the /examples/Landing_Page.ipynb notebook block by block.
In block , use the map interface to draw a small area of interest, and select a time frame.
Click "Query Cube" and review the number of tiles that will be accessed. Less than 100 will run quickly.
Run block , 'band_indices_aws_landsat8', click on the NDWI button, and calculate NDWI for anywhere inside your previous bounds.