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Air Photography Lab

Satisfactory Essays

Chapter Six
Maps and Air Photos
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Objectives
The objectives of this lab are to learn how to interpret and depict landforms using air photos, topographic maps, and geologic maps. In geology, maps have many functions. It is essential to be able to read and understand a map (paper or digital) while in the field. Geologic maps contain more information than common highway maps. Features such as faults, folds, rock formation, strike and dip, elevation and a variety of other information can be found, depending on the type of map.

Key Terms
Air photo, anaglyphs, contour interval, contour line, cut bank, depression contour, fractional scale, graphical scale, index contour, landform, lineament, profile, scale, stereoscope, …show more content…

Wells drilled into such fractures often produce large amounts of groundwater. Lineaments are usually subtle, but may show up as a wet area containing greener vegetation. Where fractures intersect the land surface, there is usually a trough in the topography that funnels water from surrounding areas. Watch for lineaments as you study air photos in this lab.

Land use planners use air photos to depict roadways and existing developments, landforms such as unstable slopes that may hinder development, environmentally sensitive areas such as wetlands that may be damaged by development and buffer zones around lakes and rivers that should not be developed due to flood hazards.

Using special glasses called stereoscope, it is possible to view adjacent air photos so that the image appears three-dimensional. Learn from your instructor how to use a stereoscope. Study various images in the Aerial Stereogram book until you are comfortable using the stereoscopic glasses. We will study several image in detail. When using a stereoscope to study the image, read the accompanying captions and note the coordinate system along the edges of the photos. Use coordinates to locate features on the maps. Page 8 - Gros Ventre

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