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The National Map Corps consists of volunteers who devote some of their time to provide cartographic information to the U.S. Geological Survey. The only requirements to participate are having access to the Internet and a current familiarity with the area being mapped. [6] This data is used to update The National Map.
The United States remains virtually the only developed country in the world without a standardized civilian topographic map series in the standard 1:25,000 or 1:50,000 metric scales, making coordination difficult in border regions (the U.S. military does issue 1:50,000 scale topo maps of the continental United States, though only for use by ...
USGS logo. A Digital Line Graph (DLG) is a cartographic map feature represented in digital vector form that is distributed by the U.S. Geological Survey (USGS). DLGs are collected from USGS maps and are distributed in large, intermediate and small scale with up to nine different categories of features, depending on the scale.
GeoHive Map Viewer: Formerly Ordnance Survey Ireland/Suirbhéireacht Ordanáis Éireann (OSI/SOÉ) Israel: המרכז למיפוי ישראל Survey Of Israel: mapi.gov.il: govMap: Italy: Istituto Geografico Militare: igmi.org: Jamaica: National Spatial Data Management Division (NSDMD) mwh.gov.jm: Japan: 国土地理院 Geospatial Information ...
Shaded relief map of the United States, showing 10 geological provinces. The richly textured landscape of the United States is a product of the dueling forces of plate tectonics, weathering and erosion. Over the 4.5 billion-year history of the Earth, tectonic upheavals and colliding plates have raised great mountain ranges while the forces of ...
A map of the U.S. shows the Smackover Formation and the scientists’ sampling area in southwestern Arkansas. The formation is in yellow, and the sampling area is in red.
The logo of the United States Geological Survey (USGS) The Geographic Names Information System (GNIS) is a database of name and location information about more than two million physical and cultural features throughout the United States and its territories; the associated states of the Marshall Islands, Federated States of Micronesia, and Palau; and Antarctica.
A National Atlas map from 2002 National Atlas map (from circa 2005) depicting historical United States territorial acquisitions. The National Atlas of the United States was an atlas published by the United States Department of the Interior from 1874 to 1997. Older editions were printed, but the most recent edition was available online.