GYPSY MOTH DEFOLIATION ASSESSMENT 
USING LANDSAT DIGITAL IMAGERY 
STUDY AREA; D0U8UNG GAP MOUNTAIN. PA 
gure 
1. 
Pictorial flow chart illustrating 
steps in conducting a defoliation 
using Landsat digital image data. 
the various 
assessment 
UTM Map Projection 
County Boundaries 
Forest District Boundaries 
Landsat Digital Mosaic. 1976-1979 Data 
Depicting Healthy Forest Conditions 
Forest/Non-Forest Mask 
Landsat Data Depicting Defoliation 
Conditions 
Additional MSS Layers or Other 
Map Registered Information as Desired 
gure 2. A schematic diagram illustrating the desired 
characteristics of the Pennsylvania statewide 
data base.