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Show i U S G S Making Survey in Two Counties Engineering field pafties of the Topographic Division, U. S. Geological Geo-logical Survey, are now engaged in surveying operations for the preparation prep-aration of an accurate topographic map of parts of Beaver and Millard Counties. This mapping is part of a continuing nation-wide program that has been underway for many years, the objective of which is to complete and maintain a series of standard topographic maps covering cover-ing the United States and its possessions. pos-sessions. J. M. Lee is acting project en gineer, pending arrival of A. J. Bosky, who will be permanent project engineer. Others em- ; ployed in the survey work are Joe C. Durbin, Chris Caroompas and Francis E. Hamilton, at Mil-ford, Mil-ford, and Joe Dunn, Fred Ran-dell Ran-dell and Richard Ramsdell at Delta. Boyd Horlon and Lorraine Hardy of Milford, and George E. Carter, Edwin P. Lister and George E. Wright at Delta, are Utahns employed in the survey. The completed maps are published pub-lished in rectangular sheets, called quadrangles. These show roads, trails, houses, political boundaries, and all man-made features, as well as lakes, ponds, courses of streams, and other water features. In addition, addi-tion, these maps depict the shape and slope of the land surface, its hills and valleys, and give its altitude alti-tude above sea level. Quadrangle maps of adjacent areas can be joined to show any desired area, such as a city, county, or school district. Topographic maps serve as a basis for the study and solution of many problems relating to activities activi-ties that are affected by the character char-acter and relief of the earth's surface. sur-face. The problems may involve mineral or water resources, prospecting pros-pecting or mining, engineering construction of all types, location of industrial sites, urban planning, military requirements, and recreation. recrea-tion. Good maps facilitate the development de-velopment of all projects that deal with the land. Although any one mapping project may be partially related to a particular devopment or a specific need, the topographic mapping of the Geological Survey is done essentially because these maps have a general-purpose value, and because it is sound economy to have them on hand for any specific planning that future developments or investigations might require. In the preparation of these maps, the most modern engineering methods are employed. Aerial photographs and precise photo-grammetric photo-grammetric instruments are part of the basic mapping process, but field surveys still are required at two stages. The first of these is to establish control points that is, elevations above sea level and geodetic geo-detic positionns. The second is to check the accuracy of the map as drawn from the aerial photographs, I and to complete the identification and classification of buildings, roads, streams, boundaries, and other features. The completion surveys now are in progress in this area and the cooperation of local residents and landowners in assisting assist-ing the field parties engaged in these surveys will be greatly appreciated. ap-preciated. More than twenty thousand topographic topo-graphic maps have been published by the Geological Survey and several sev-eral million copies are distributed annually. Available without cost are state indexes showing areas covered by published maps, a folder fol-der describing topographic maps, and a brochure entitled "The Geological Geo-logical Survey." Most of the topographic topo-graphic quadrangle maps are sold for 30c a copy and may be ordered from the Geological Survey, Federal Fed-eral Center, Denver 2, Colorado. Copies of the aerial photographs and geodetic control lists used for this mapping are available at nominal nomi-nal charge from the Pacific Region Engineer, U. S. Geological Survey, Middlefield Road, Menlo Park, California. Local inquiry may be made to P. 0. Box 367, Milford, or P. 0. Box 307, Delta, temporary field offices for operations now underway. |