LYCOS RETRIEVER 
Aerial Photographs
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Aerial photographs contain a lot of information, so different users examine them for different purposes. A consulting civil engineer may be looking for anomalies in drainage patterns, for example. A geologist may examine landforms to make deductions about the subsurface. A duck hunter may look for stock ponds that don't show up on topographic maps. So the engineer or geologist would use two photographs and a stereoscope, while the hunter can look at a single photograph unaided as he spreads it across the hood of his truck. In both cases... the users are likely to examine the photographs and USGS topographic maps together, perhaps alternating between the two to connect place names and road numbers with unidentified features in the photographs.
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Aerial photographs are produced by exposing film to solar energy reflected from Earth. Photographic media have been used for aerial reconnaissance since the middle of the 1860's; color film became widely used in the 1950's. Color-infrared film, which records energy from portions of the electromagnetic spectrum invisible to the human eye, was developed to detect camouflaged military objects in the 1940's. In a color-infrared (... known as false-color) photograph, near-infrared light reflected from the scene appears as red, red appears as green, green as blue, and blue as black. Color-infrared film is useful for distinguishing between healthy and diseased vegetation, for delineating bodies of water, and for penetrating atmospheric haze.
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Aerial photographs offer you a new way to analyse the strengths or weaknesses of a property’s location. Now you can access this information easily with RP Data’s Aerial Photographs service. To view an aerial photo of a property, simply find the property record and press a key. You can ... print high-resolution colour copies.
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Aerial photographs for the following years are of a limited area for Gloucester County . These prints are for office viewing only. Copies may be obtained by contacting the original sources at their links.
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The aerial photographs from the 1926-1929 set were scanned at 500 dpi. Although considerably better than the 1951 set, there is still more graininess than in the originals. Some of this is due to a similar enlargement of the image by a factor of a little over two. On all plates a scale is given of 600 feet to the inch. In actuality, the image on your screen has a scale of about 600 feet to two and one eighth inches.
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Vertical aerial photographs are more valuable for looks at streets and placement of open spaces on the photograph. Oblique aerial photos are more valuable for the appearanceof buildings as they are shot from an angle and have more perspective. Many patrons who ask for aerial photographs are simply asking for panoramic views of the city regardless of whether the photos are taken from airplanes, tall buildings, blimps or hill tops. If the patron is looking for something to hang on the wall or for some non-specific view of Los Angeles they can be referred to the History Department Reference desk at (213) 228-7400 to make a photo appointment. The Photo Collection contains approximately 600 oblique aerial photos taken within the Los Angeles city limits. These photos do not have any captions or identifications.
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Aerial Photographs