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Figure 1. This BLM map depicts the principal meridians and baselines used for surveying states (colored) in the PLSS. The following are the principal and guide meridians and base lines of the United States, with the year established and a brief summary of what areas' land surveys are based on each.
The United States of America is a federal republic [1] consisting of 50 states, a federal district (Washington, D.C., the capital city of the United States), five major territories, and various minor islands. [2] [3] Both the states and the United States as a whole are each sovereign jurisdictions. [4]
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 topographic map of the United States. The United States is the world's third-largest country by total area behind Russia and Canada. [d] [180] [181] The 48 contiguous states and the District of Columbia occupy a combined area of 3,119,885 square miles (8,080,470 km 2).
The National Map is a significant contribution to the U.S. National Spatial Data Infrastructure (NSDI) from the Federal Geographic Data Committee (FGDC) and currently is being transformed to better serve the geospatial community by providing high quality, integrated geospatial data and improved products and services including new generation ...
April 15, 1931 The United States expropriated from Panama additional areas around the soon-to-be-built Madden Dam and annexed them to the Panama Canal Zone. [365] [373] Caribbean Sea: May 3, 1932 The United States adjusted the border at Punta Paitilla in the Canal Zone, returning a small amount of land to Panama. This was the site for a planned ...
The Upland South is defined by landform, history, and culture, and does not correspond well to state lines. This map shows the approximate region known as the Upland South. The Upland South and Upper South are two overlapping cultural and geographic subregions in the inland part of the Southern United
The continental shelf of the United States serves as the limit of United States sovereign power, when not demarcated by an actual land border. Due to the fact that "The coastal State exercises over the continental shelf sovereign rights," [ 1 ] the continental shelf serves as the territorial sea and the exclusive economic zone of the United ...