Practical

Simple map of

• Grassland

• Builtland

• Peatland

• Crop

• Forest

• Natural Vegetaion

• Water

MERMS 12 - L4

Supervised Classification in ArcMAPClick the Training Sample Manager Button

MERMS 12 - L4

Click the Draw Polygon Icon

MERMS 12 - L4

Digitise at least 5 Training areas foreach theme

MERMS 12 - L4

• Save Training Samples in your GEODIRECTORY

• Save Signature File in your normal directory

Click on Interactive Supervised Classifcation

MERMS 12 - L4

Improve your map

• Check the histograms are ‘normal’

• Check the number of pixels are adequate- trycombining samples of the same theme

• You want to achieve aprox 85-90% accuracy