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United States Geological Survey (USGS) / 38.9470; -77.3675. The United States Geological Survey ( USGS ), founded as the Geological Survey, is an agency of the United States government whose work spans the disciplines of biology, geography, geology, and hydrology. The agency was founded on March 3, 1879, to study the landscape of the United ...
Topography is a field of geoscience and planetary science and is concerned with local detail in general, including not only relief, but also natural, artificial, and cultural features such as roads, land boundaries, and buildings. [1] In the United States, topography often means specifically relief, even though the USGS topographic maps record ...
Mar 5, 2024 · The mission of the National Geospatial Program is to provide National topographic information to advance science, support government, enlighten citizens, and enable decision making. The NGP provides a foundation of digital geospatial data representing the topography, natural landscape, and manmade environment of the United States.
Materials within the library system include books and maps dating back to the 16th and 17th centuries, as well as a nearly complete set of the various State Geological Survey publications. U.S. Geological Survey Library Classification System. The classification system is designed for use in the USGS Library and other earth science libraries.
A topographic map of the United States. The United States is the world's third-largest country by total area behind Russia and Canada. The 48 contiguous states and the District of Columbia occupy a combined area of 3,119,885 square miles (8,080,470 km 2).
Non-conforming maps help make the National Topographic System (NTS) more efficient. Generally, non-conforming map sheets can be identified by their irregular lines on the grid; however, some non-conforming 1:250 000 maps are identified by a light/dark pattern of lines and repositioned labels.
