Download Aerial Mapping: Methods and Applications, Second Edition by Dennis Morgan, Edgar Falkner PDF

By Dennis Morgan, Edgar Falkner

Construction at the beginning of the bestselling first variation, Aerial Mapping: tools and purposes, moment version provide you with a realistic realizing of aerial images, distant sensing, and photogrammetric mapping. The content material is intentionally semi-technical and tactics are mentioned in a way simply obtainable to somebody despite their technical or clinical history. This re-creation highlights the numerous alterations in apparatus and methods. High-speed desktops, scanners, and distant sensors have replaced the way in which mapping is finished. the rules of photogrammetry, photo research, and distant sensing became dynamically intertwined. With the cast grounding in easy strategies that Aerial Mapping: equipment and functions, moment variation presents you could observe your wisdom to the particular stipulations of every aerial mapping venture.

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Additional resources for Aerial Mapping: Methods and Applications, Second Edition (Mapping Science)

Example text

Private-Sector Mappers Some mapping companies, especially those located near large metropolitan areas, periodically offer speculation aerial photography for sale to the general public. This is often valuable for historical study, business location forecasting, or trend analysis. These firms are also available for custom photo projects. In addition, their film libraries contain negatives from clients who may give permission for reproduction products. There are various sources for locating firms which engage in aerial photographic activities.

200 ft. On the photo or map, 1 in. is equal to 200 ft on the ground. Conversely, to convert from an engineers’ scale of 1 in. = 200 ft, multiply 200 ft by 12 in. This simple arithmetic exercise equates 1 in. on the map or photograph to 2400 in. on the ground. The resultant representative fraction would be 1:2400. * The geometry discussed in this chapter is reduced to several simple formulae that can be easily utilized in planning aerial photographic missions. 1 Geometry of negative scale. 1 identifies similar triangles A and B.

On the map/photo = 2400 in. 2 Engineers’ Scale Engineers’ scale is expressed as a ratio in the form of 1 in. = 200 ft, where one unit on the photo or map represents a number of different units on the ground. 3 Scale Conversion Both of the examples of scale cited above mean the same thing. In order to convert from a representative fraction of 1:2400, assume that both are in inches. Then 2400 in. divided by 12 in. equals 200 ft, so the resultant engineers’ scale is 1 in. = 200 ft. On the photo or map, 1 in.

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