SUPERVISED CLASSIFICATION in ERDAS imagine

AIM: To supervise classification and interpret raster image

Material used: Erdas imagine and ArcGIS 10.2

PROCEDURE
1. To add image

Right click on the workspace → open raster image

(The opened fata should be in ‘.img’ format)

If any error is there in the image, it will show by a yellow exclamation mark.

Right click image layer → Recitify

2.Select Raster from the menu bar → classification → Supervise → Signature edit →

a window will appear, in that add the sample signature

Take drawing from the menu bar → Rectangle → Select a portion for sampling

Click on the ‘signature editor/ window that appear sp that the selected sample will be available.

Give the class name for the samples.

Take 5 minimum sample for each classification ( no. of sample selected is based on area of project).

If we repeat the same value, it can be deleted

1. Click file from the menu bar of ‘signature editor window, → save the signature edits (save in ‘.sig’ format

2. Raster → classification → supervise → supervised classification

Input is automatically taken by the system

Set the ‘.sig’ input

Set the output to ‘img’ format

Hit ok

Processing

3. Again right click on the workspace → Open new raster

RESULT

Practice Material Link :

https://drive.google.com/open?id=1p2U1wLj2LjdL78gPzKQqeq2Y5t4LK3b8