# Introduction to Photo Interpretation

National Archives and Records Administration Introduction to Photo Interpretation Department of the Interior. Geological Survey. Topographic Division. (1947 - 1980) INTRODUCTION TO PHOTO INTERPRETATION FOR THE DISCOVERY AND EVALUATION OF NATURAL RESOURCES, ca. 1955. ARC Identifier 11887 / Local Identifier 57.8. Provides training in the techniques of photo interpretation for the discovery and evaluation of the natural resources of a country or region. The film begins with a summary of the idea of "resources," and their development by mankind for a variety of purposes. Early on in the film the case is presented for the verification of information by a study of the ground area, and an understanding of ground truth. The use of aerial photography is introduced first by showing how trees and vegetation coverage is evaluated and interpreted by the Forest Service. In this sequence, kinds of timber are differentiated and their images on photography examined. The difference between soft pine and hardwood deciduous trees is noted on the photos. Further analysis carried out by use of counting of crowns in measured areas, and by looking at crown size and forest density. A second segment details how Geologic maps can be made and benefit from aerial photographic interpretation. It is noted that color imagery adds a ueful and helpful dimension to the process of detecting certain minerals and formations. Ground Truth observations, and verification for accuracy of interpretation are…

- Kind: Educational
- Year: 1955
- By: National Archives and Records Administration
- Genres: Education
- Archive: [Internet Archive](https://archive.org/details/gov.archives.arc.11887)
- Licence or status: [CC0 1.0](http://creativecommons.org/licenses/publicdomain/zero/1.0/) (as the archive states it)
- Who can watch: Tweens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

Not offered: its uploader marks it public domain, and the US Copyright Office's records do not settle that it is (a record that may be another film's, a film first published abroad, a year when renewal was automatic, or a country they do not name). Unclear is not offered.