Handbook for Predicting Stream Meander Migration and Supporting Software (2004) / Chapter Skim
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17 4.1 INTRODUCTION Accurate calculation and prediction of bend migration rates from historical sequences of aerial photographs requires the application of the principles of photogrammetry. The American Society of Photogrammetry and Remote Sensing defines photogrammetry as the art, science, and technology of obtaining reliable information about physical objects and the environment through processes of recording, measuring, and interpreting photographic images and patterns of recorded radiant electromagnetic energy and other phenomena (Wolf and Dewitt, 2000)
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a photo that covers an area of about 33 mi2 (85 km2) at a scale of 1:40,000.
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19 on the photo and a measurement on the ground. Scale can be expressed as a representative fraction or a unit equivalent.
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producing maps.
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21 4.4 MAP AND AERIAL PHOTOGRAPHY REQUIREMENTS AND SOURCES Historical and contemporary aerial photos and maps can be obtained inexpensively from a number of federal, state, and local agencies. Table 4.1 lists some of the main sources.
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manipulated by a wide variety of software and can be used in GIS applications. General instructions on downloading TerraServer images can be found in Appendix A
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