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Unformatted text preview: x-y coordinates How to get the coordinates of an object in a photograph: 1. Survey the object in the field 2. Register (rectify) the photo to a base map and then read the coordinates for the object in question Size Measure the size of known objects in the photo to get the scale. Use the scale to measure the size of unknown objects. Shape The general outline of objects Shadow Shadows can be used to determine the heights of features. Bench height/bench shadow = person height/person shadow Person height = person shadow* bench height/bench height Shadow Characteristics Provide information on relative height. Reveal geometric characteristics of some features. Provide a means for interpreting topographic features. Hide information about areas that are in the shadows. Tone Spectral reflectance curve (spectral signature)....
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This note was uploaded on 02/23/2011 for the course GEOL 170 taught by Professor Staff during the Spring '11 term at Maryland.
- Spring '11