The public may download digital aerial photography products at no cost from the Earth Resources Observation and Science Center (EROS).
The question refers to scanned images of traditional aerial photography film, and these scans are not georectified.
No. A photographic enlargement only appears to show more detail than a 9-by-9 inch photograph. Photographic resolution (or image resolution) deteriorates with each enlargement factor.
Aerial photographs and satellite imagery for the United States are available in many formats as described on the EROS Web site:
The public may download digital aerial photography products at no cost from the Earth Resources Observation and Scienc
The aerial photographs date as far back as the 1940's for the United States and its territories. Availability of specific coverage, film type, and acquisition dates vary from agency to agency.
The National High Altitude Photography (NHAP) program was initiated in 1980 and coordinated by the U.S. Geological Survey to acquire aerial photography of the 48 conterminous United States every 5 years.
Remote sensing is the process of detecting and monitoring the physical characteristics of an area by measuring its reflected and emitted radiation at a distance from the targeted area.
What is the difference between scale, and medium and high-resolution, when used in describing aerial photography?
Simply defined, scale can be expressed as the ratio or proportion between a distance on the aerial photographs (or maps) and the actual distance on the ground or land surface.
Yes. Scanning of the EROS film archives is following a plan to capture images from rolls at risk of decay from vinegar syndrome. Science requirements are also reviewed on a regular basis, but a formal, on-line schedule is not available at this time.
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