Unsupervised Classification>Practical Work Of ERDAS IMAGINE

NDVI (Unsupervised Classification)

Ø  Open ERDAS IMAGINE 2013 and open it

Ø  Click on file and click on open then click on raster layer

Ø  Click on RS lab 10 then click on Lab 10

Ø  Click on Lanier – 7 bands. Img

Ø  Right click on layer and click on fit to frame

Ø  Click on Raster

Ø  Click on unsupervised and click on NDVI

Ø  Click on select output file

Ø  Click on folder where the layer saves

Ø  Click on file name and save the file name then click on ok

Ø  Click on index and click on choose index to compute and choose the compute index of according to your own choice.

Ø  Then click on ok and close

Ø  Open Arc map and click on add data

Ø  Then click on leaner ire N0.1. img and click on add

Ø  Right click on leaner no.1. img

Ø  Click on properties

Ø  Click on select color Ramp

Ø  Click on insert then click on ok

Ø  Click on Arc toolbox

Ø  Click on spatial Analyst tools

Ø  Click on reclass then click on reclassify

Ø  Click on input Raster then click on leaner no1. Img

Ø  Click on ok

Ø  Right click on open attribute table

Ø  Click on table options

Ø  Click on add filed

Ø  Name: Area

Ø  Type: Double then click on ok select the count values

Ø  Click on Area and then click on filed calculator

Ø  Click on count [(count+)*900] / 1000000

Ø  Click on start then click on Excel

Ø  Add the values of area in Microsoft Excel

Ø  Click on insert then click on pie graph

Ø  Again click on percentage pie graph

Ø  In the paint and click on paste

Ø  Click on paint then click on save the picture in the form of JPEG

Ø  Go back to Arc GIS

Ø  Click on layout view click on file and select A4 size page

Ø  Click on insert then click on Title, legend, Text, North arrow, scale bar and click on picture

Ø  Click on layers and show the Grids

Ø  Click on file then click on Export map

Ø  Click on save and then click on file the name and save the picture in the form of JPEG