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The geographic information available includes orthoimagery (aerial photographs), elevation, geographic names, hydrography, boundaries, transportation, structures and land cover. The National Map is accessible via the Web, as products and services, and as downloadable data. Its uses range from recreation to scientific analysis to emergency ...
The United States contains varied landforms across its territory. These include: List of beaches in the United States; List of fjords of the United States; List of glaciers in the United States
Interfluve – Land between two converging, or confluent, rivers; Inverted relief – Landscape features that have reversed their elevation relative to other features; Island – Piece of subcontinental land surrounded by water; Islet – Very small island; Isthmus – Narrow strip of land connecting two larger land areas
A physiographical map of the contiguous 48 states of the U.S. and indicating the age of the exposed surface and the type of terrain An aerial photo over northern Ohio; much of the central United States is covered by relatively flat, arable land. Within the continental U.S. there are eight distinct physiographic divisions.
The various features shown on the map are represented by conventional signs or symbols. For example, colors can be used to indicate a classification of roads. These signs are usually explained in the margin of the map, or on a separately published characteristic sheet. [17] [18] [19] Topographic maps are also commonly called contour maps or ...
Topography is the study of the forms and features of land surfaces. The topography of an area may refer to the landforms and features themselves, or a description or depiction in maps. Topography is a field of geoscience and planetary science and is concerned with local detail in general, including not only relief , but also natural ...
The following sortable table comprises the 200 most topographically prominent mountain peaks of the United States of America. The summit of a mountain or hill may be measured in three principal ways: The topographic elevation of a summit measures the height of the summit above a geodetic sea level. [1] [2]
Geomorphology (from Ancient Greek γῆ (gê) 'earth' μορφή (morphḗ) 'form' and λόγος 'study') [2] is the scientific study of the origin and evolution of topographic and bathymetric features generated by physical, chemical or biological processes operating at or near Earth's surface.