Upload
others
View
4
Download
0
Embed Size (px)
Citation preview
Mapping Coastal Habitat (Somiani Hor)
1. Mangroves
2. Seaweeds
3. Turbidity
4. Water
5. Sandy shores
6. Rocky shores
Use Indices to extract different feature
· NDVI for 01 and 02
Formula
(NIR-RED)/(NIR+RED)
· ND Water Index (Green-NIR)/(Green+NIR)
· ND Soil Index (SWIR-NIR)/ (SWIR+NIR)/
· ND Turbidity Index (Analyze the bands and make an index for this)
To map habitat
1. Stack all indices
2. run unsupervised classification
3. run supervise classification
4. Use threshold values to extract the specific features.
1. stacking
2. 2 .subset
3. Indices
4. Stack all indices
5. Classification
Save training samples as GSG (signature file. gsg)
Add two fields in attribute table
Name-text – strat editing from editor tool bar
Add names of features/class
Area-float—right click on area column, click on field calculator
Area-float—right click on area column, click on field calculator, Now multiply [{900(pixel resolution 30*30 for lansat)*count}/1000*1000}]