envi classification

toolbox -> classification -> workflow 

open file -> no training data -> 7 classes

enable smooth, aggregation

toolbox -> classification workflow -> use training data

algorithm tab -> spectral anger mapper method -> max angle none

property tab -> change 1st class name to undeveloped

draw 3 undeveloped regions on map

add vegetation, building, and roads class. draw polygons

reference:

https://www.l3harrisgeospatial.com/docs/classificationtutorial.html