ELEVATION CONTOURS --
Elevation Contours (1:24,000)
A digital representation of elevation contours shown on 7.5-minute topographic quadrangle maps of the U.S. Geological Survey.
Contour interval is typically 10 feet.
NOTE: For convenience of downloading, the 1:24,000 quadrangles are grouped into blocks of 30-minute by 1-degree (1:100,000) quadrangles.
Example of FGDC metadata for the Adrian (1:100,000) Quadrangle: CONTOURS_24K_USGS_ADRIAN