Few Indicies(NDVI... etc) performed on ERDAS software using Model Maker
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Transcript of Few Indicies(NDVI... etc) performed on ERDAS software using Model Maker
INDICES(USING MODEL MAKER)
By
Swetha. A
5WD12CGI15
Run ERDAS Click on “Modeler” from tools. Click on “Model Maker”. New model window will appear.
Use the given tool box shown below to draw a model.
NDVI (NORMALISED DIFFERENCE VEGETATION INDEX)
The model should be build as shown.
NDVI=(B4-B3)/(B4+B3)
$n1_lis2poanta(4) contains the following formula.
Arithmetic functions are used.
For n6_memory, n5_memory and n7_memory, “Temporary Raster Only” option is selected.
Output of NDVI, where vegetation features are highlighted.
NDWI (NORMALISED DIFFERENCE WATER INDEX)
The model should be build as shown.
NDWI=(B2-B4)/(B2+B4)
Output of NDWI, where water features are highlighted.
NDTI (NORMALISED DIFFERENCE TURBIDITY INDEX)
The model should be build as shown.
NDTI=(B1-B2)/(B1+B2)
Output of NDTI, where turbid water features are highlighted
NDPI (NORMALISED DIFFERENCE POND INDEX)
The model should be build as shown.
NDTI=(B5-B2)/(B5+B2)
Output of NDPI, where pond water features are highlighted
MNDWI (MODIFIED NORMALISED DIFFERENCE WATER INDEX)
The model should be build as shown.
MNDWI=(B2-B5)/(B2+B5)
Output of MNDWI
THANKS