NDVI , NDWI , NDPI , NDTI , MNDWI

1. INDICES
(USING MODEL MAKER)
By
Swetha. A
5WD12CGI15

2. Run ERDAS
 Click on “Modeler” from tools.
 Click on “Model Maker”.
 New model window will appear.


3. 
Use the given tool box shown below to draw a
model.

4. NDVI (NORMALISED DIFFERENCE
VEGETATION INDEX)

5. 
The model should be
build as shown.

NDVI=(B4-B3)/(B4+B3)

6. $n1_lis2poanta(4) contains the following formula.
 Arithmetic functions are used.


7. 
For n6_memory, n5_memory and
n7_memory, “Temporary Raster Only” option is
selected.

9. 
Output of NDVI, where vegetation features are
highlighted.

10. NDWI (NORMALISED
DIFFERENCE WATER INDEX)

11. 
The model should be
build as shown.

NDWI=(B2-B4)/(B2+B4)

12. 
Output of NDWI, where water features are
highlighted.

13. NDTI (NORMALISED
DIFFERENCE TURBIDITY INDEX)

14. 
The model should be build
as shown.

NDTI=(B1-B2)/(B1+B2)

15. 
Output of NDTI, where turbid water features are
highlighted

16. NDPI (NORMALISED
DIFFERENCE POND INDEX)

17. 
The model should be
build as shown.

NDTI=(B5-B2)/(B5+B2)

18. 
Output of NDPI, where pond water features are
highlighted

19. MNDWI (MODIFIED
NORMALISED DIFFERENCE
WATER INDEX)

20. 
The model should be
build as shown.

MNDWI=(B2-B5)/(B2+B5)

21. 
Output of MNDWI

22. THANKS