NARL BAR Index by Quad (1948-49) scanned for the Barrow Area Information Database (BAID), North Slope, Alaska This disk contains scanned copies of a paper map indexes of flight lines and approximate coverage for individual air photo frames from air photo missions conducted by the Navy Arctic Research Laboratory (NARL) during the late 1940's and early 1950's covering Alaska's North Slope. These missions are commonly referred to as the NARL BAR missions. The indexes were drafted over 1:250000 scale USGS quads. Each quad has been scanned and georeferenced by the University of Texas at El Paso System Ecology Lab for use in the Barrow Area Information Database (BAID). See the individual files metadata for more information. For more information on BAID see www.baidims.org.