Aerial View Maps

What is the scale of a Aerial photograph used for aerial photogrammetry?

what are common Standard scales

Public Comments

1. Scale in an aerial photograph depends on the the height of the plane and the optical system of the camera or sensor. Raw aerial photographs or satellite images have to be rectified to a certain scale. Depending on the reasons that aerial photography what shot sometimes determines the scale. In the United States, the USGS uses 1:24,000, 1:40,000 and 1:80,000 scales. http://edcwww.cr.usgs.gov/guides/news/aerialfaq.htmlt#A15 I've rectified raw satellite Thematic Mapper images. My references were 7.5 minute 1:24,000 scale USGS topographic maps. There's nothing quite like discovering that you rectified your thesis satellite image so that it is slightly over a mile off east west and 5 miles off north south. Fortunately, by the time I discovered my rectification was off, I had online resources to use a references, so I didn't have to crawl all over the remote sensing lab floor with 20 or more 7.5 minute topographic maps to reference my image to. The technology improved a LOT in 5 or six years. A Soil Conservation Service or USGS aerial photograph should have either the scale or elevation and focal length of the camera somewhere on the front or back of the image. The USGS has switched to using satellite images for producing ortho quarter quadrangles, which are 1/4 of of a 7.5 minute 1:24,000 scale with overlap for mosaicing.