It will be very useful because if you have different session satellite image of same place then using that you can identified the water logged area using same NDWI. To map out waterlogged areas using the Normalized Difference Water Index (NDWI) in a GIS software like ArcGIS Pro, you can follow these steps: 1. **Acquire Satellite Imagery**: Obtain multispectral satellite imagery that includes near-infrared (NIR) and green (G) bands. Landsat and Sentinel satellite missions are commonly used for this purpose. 2. **Calculate NDWI**: Use the following formula to calculate NDWI: \[ NDWI = \frac{(NIR - G)}{(NIR + G)} \] Where NIR is the near-infrared band and G is the green band. 3. **Import Data into ArcGIS Pro**: Import the satellite imagery and the calculated NDWI layer into ArcGIS Pro. 4. **Symbolize NDWI Layer**: Symbolize the NDWI layer to visualize waterlogged areas. Typically, you would use a color ramp that goes from blue (indicating water) to green or yellow (indicating dry land). 5. **Threshold NDWI Values**: Determine a threshold NDWI value that separates waterlogged areas from dry land. This threshold can be determined based on the characteristics of your study area and the image you're working with. 6. **Create a Mask**: Create a mask using the threshold NDWI value to classify areas as waterlogged or not. This can be done using the 'Raster Calculator' or similar tool to create a new raster layer where pixels above the threshold are classified as waterlogged and pixels below are not. 7. **Map Waterlogged Areas**: Display the mask layer on top of your base map to visualize waterlogged areas. You can further refine the display and analysis by overlaying other layers such as land use or soil type. 8. **Validate Results**: Validate the results by ground truthing or comparing them with other sources of information to ensure accuracy. By following these steps, you can use NDWI to effectively map out waterlogged areas in your study area.
Pls can you give me the documents you used for this analysis?
sure share your mail id to me. I have to check that document. If I found that I will share with you.
how can i use NDWI to map out waterlogged areas?
It will be very useful because if you have different session satellite image of same place then using that you can identified the water logged area using same NDWI. To map out waterlogged areas using the Normalized Difference Water Index (NDWI) in a GIS software like ArcGIS Pro, you can follow these steps:
1. **Acquire Satellite Imagery**: Obtain multispectral satellite imagery that includes near-infrared (NIR) and green (G) bands. Landsat and Sentinel satellite missions are commonly used for this purpose.
2. **Calculate NDWI**: Use the following formula to calculate NDWI:
\[
NDWI = \frac{(NIR - G)}{(NIR + G)}
\]
Where NIR is the near-infrared band and G is the green band.
3. **Import Data into ArcGIS Pro**: Import the satellite imagery and the calculated NDWI layer into ArcGIS Pro.
4. **Symbolize NDWI Layer**: Symbolize the NDWI layer to visualize waterlogged areas. Typically, you would use a color ramp that goes from blue (indicating water) to green or yellow (indicating dry land).
5. **Threshold NDWI Values**: Determine a threshold NDWI value that separates waterlogged areas from dry land. This threshold can be determined based on the characteristics of your study area and the image you're working with.
6. **Create a Mask**: Create a mask using the threshold NDWI value to classify areas as waterlogged or not. This can be done using the 'Raster Calculator' or similar tool to create a new raster layer where pixels above the threshold are classified as waterlogged and pixels below are not.
7. **Map Waterlogged Areas**: Display the mask layer on top of your base map to visualize waterlogged areas. You can further refine the display and analysis by overlaying other layers such as land use or soil type.
8. **Validate Results**: Validate the results by ground truthing or comparing them with other sources of information to ensure accuracy.
By following these steps, you can use NDWI to effectively map out waterlogged areas in your study area.
Pls can you make a video so we can understand it very well
@@spaceremotesensingandgis5626
@@spaceremotesensingandgis5626 Pls can you I make a video so I can understand better 🙏😩
How can I download or come up with the multispectral .tif file?
You can go to earth explorer and download those file. this is the link earthexplorer.usgs.gov/
Great....but slow down
Sure will follow in future to slow down.
Thanks give me this documents
ok send me your mail id I will send you this document
@@spaceremotesensingandgis5626
Simple and elegant. Good luck