What is a quadrangle on a map?
A “quadrangle” is a topographic map produced by the United States Geological Survey (USGS) covering the United States. The maps are usually named after local physiographic features. The shorthand “quad” is also used, especially with the name of the map; for example, “the Ranger Creek, Texas quad”.
What is the purpose of a quadrangle map?
The topographic map quadrangles are still commonly used as base maps for outlining data collection strategies and defining project boundaries. Thus, it is useful to characterize the extent of the topographic change inventory in terms of the footprints of the 7.5-minute map series.
Where can I get a quadrangle map?
USGS
The best known USGS maps are the 1:24,000-scale topographic maps, also known as 7.5-minute quadrangles. Download all dates and scales of USGS topographic maps free of charge from the following applications or order paper copies of all dates through the USGS Store.
Why is the map called a 7.5 quadrangle map?
7.5 minute maps are so called because each covers 7.5 minutes of latitude and 7.5 minutes of longitude on the earth’s surface. On the ground, this is approximately equal to eight miles (north and south) by six miles (east and west).
What is a quadrangle shape?
A quadrangle, or quadrilateral, is a two-dimensional shape with four angles and four sides. A trapezoid is a quadrangle with at least one pair of parallel sides. A kite is a quadrangle with two pairs of adjacent congruent sides. A parallelogram is a quadrangle with two pairs of parallel sides.
What does USGS stand for?
United States Geological Survey
The USGS (United States Geological Survey) is a science bureau within the United States Department of the Interior.
What is a quadrangle in real estate?
In the Government Survey method of describing real property, a square area of land 24 miles square (24 miles on each side or 576 square miles), containing 16 Townships (six miles square) or 576 Sections (one mile square).
In what part of Washington state is this quadrangle?
The Lacey quadrangle is located at the south end of Puget Sound in Thurston County and includes most of the city of Lacey and part of the city of Olympia.
How many square miles is a quadrangle?
In the United States, a 7.5 minute quadrangle map covers an area of 49 to 70 square miles. As a specific surveying term, a quadrangle is the basic subdivision of the United States Public Land Survey System.
What is a quadrangle in architecture?
quadrangle, byname quad, in architecture, rectangular open space completely or partially enclosed by buildings of an academic or civic character. The grounds of a quadrangle are often grassy or landscaped. The term is also used to describe the building or building complex that contains a quadrangular area.
How many square miles are in USGS quadrangle?
In the United States, a 7.5 minute quadrangle map covers an area of 49 to 70 square miles (130 to 180 km 2). The surfaces of other planets have also been divided into quadrangles by the USGS. Martian quadrangles are also named after local features.
What is an USGS topographic quadrangle map?
The U.S. Geological Survey (USGS) publishes maps at various scales. The scale used for most U.S. topographic mapping is 1:24,000. USGS maps at this scale cover an area measuring 7.5 minutes of latitude and 7.5 minutes of longitude and are commonly called 7.5- minute quadrangle maps.
What is a geology map?
A geologic map is a specially detailed map that depicts the distribution of rocks and geological features of a given region. These maps are drawn as if all soil and vegetation were removed from the area. The age and relationships of dispersed rock sediments and surface deposits usually are shown on geologic maps.
What is geological mapping?
GeoLogic Mapping Event Overview. GeoLogic Mapping requires that students be proficient in both reading and constructing topographic maps, geologic maps, geologic cross sections (usually depicted as layers) and other projections. The Event. Theory Topics. Example Calculation Problems. Construction Problems.