1. Primary Uses of Aerial Images

2. Primary Uses of Aerial Imagery
Basis for surveying and topographic mapping
Measure X,Y,Z
Image/Photo interpretation
Categorize or assign attributes to surface features
Used as backdrop for map

3. Photointerpretation
Photointerpretation - the process of converting images to information
Interpreters use the size, shape, color, brightness, texture, relative and absolute location of features to interpret images.

4. Size
Shape
Color
Brightness
Texture
Location

5. Photointerpretation
To properly use the characteristics, the photo interpreters should develop some familiarity with the features of interest
Interpreted photos are often compared with findings on the ground. AKA “ground-truthing”

6. Photointerpretation Most often results in thematic map
Requires the establishment of categories for interpreted features
Requires a Minimum Mapping Unit (MMU)
Executed by either:
On screen digitizing
Hardcopy interpretation