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From approximately 1947–1992, the USGS produced the 7.5 minute series, with each map covering an area one-quarter of the older 15-minute quad series, which it replaced. [1] A 7.5 minute quadrangle map covers an area of 49 to 70 square miles (130 to 180 km 2 ). [ 2 ]
DOQs produced by the USGS cover an area measuring 7.5-minutes longitude by 7.5-minutes latitude (the same area covered by a USGS 1:24,000-scale topographic map, also known as a 7.5-minute quadrangle) or 3.75-minutes by 3.75-minutes.
7.5 minute quads The Lake Range is a mountain range located in western Nevada in the United States . It is entirely in Washoe County , and the southern two-thirds are in the Pyramid Lake Indian Reservation .
Print/export Download as PDF; Printable version; In other projects ... Mescal Range and Joshua 7.5 min. quads or the Ivanpah and Mescal Range 15 min. quads.
In the United States, where the primary national series is organized by a strict 7.5-minute grid, they are often called or quads or quadrangles. Topographic maps conventionally show topography, or land contours, by means of contour lines. Contour lines are curves that connect contiguous points of the same altitude .
USGS Silver Bell West, Greene Reservoir and Gap Tank 7.5 Min. Quads The West Silver Bell Mountains are a small 10 mile (16 km) long mountain range of south-central Arizona , United States . The range lies in the north-central arid Sonoran Desert ; the Madrean Sky Islands region of southeast Arizona, around Tucson is adjacent to the southeast.
USGS Antler Peak, Galena Canyon, North Peak, and Snow Gulch, Nevada 7.5 Minute Quads The Battle Mountains or Battle Mountain Range [ 4 ] is a mountain range in western Lander and southeastern Humboldt counties of Nevada .
Rhyolite near Logan Springs, 1871. Logan, Nevada, is a ghost town [1] located in the hills about 9.5 mi (15.3 km) west of Hiko and 2.5 mi (4.0 km) south of Mount Irish Peak.