EarthExplorer: Index Frame Help

A photo index (mosaic), consists of a single-sheet composite of many individual photos. The photos date from the 1940`s - 1980`s, and were originally acquired by a variety of sources. Photo indexes will vary in scale, size, quality, and coverage; individual photos are referenced by the film roll number and individual frame on the roll.

The following examples show the various ways roll and frame information is displayed on an index. Due to the varying quality of the original film, it may be necessary for you to download the full resolution image to see roll and frame information clearly.

Note: individual frames can overlap as much as 60%. Example

Roll and Frame labels placed on film.

Roll and Frame embedded in film.

Two frames covering the same area, one labeled one embedded.

How to view or order individual frames online.

	Roll and Frame labels placed on film.
	Roll and Frame embedded in film.
	Two frames covering the same area, one labeled one embedded.

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U.S. Department of the Interior \| U.S. Geological Survey URL: http://edcsns17.usgs.gov/helpdocs/phoenix/index_frames/rollhelp.html Page Contact Information: custserv@usgs.gov Page Last Modified: Wednesday November 07, 2007