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  2. List of principal and guide meridians and base lines of the ...

    en.wikipedia.org/wiki/List_of_principal_and...

    Primarily from the United States Government Printing Office Style Manual. [1] State names usually signify only parts of each listed state, unless otherwise indicated. Based on the BLM manual's 1973 publication date, and the reference to Clarke's Spheroid of 1866 in section 2-82, coordinates appear to be in the NAD27 datum.

  3. United States Geological Survey - Wikipedia

    en.wikipedia.org/wiki/United_States_Geological...

    The United States Geological Survey (USGS), founded as the Geological Survey, is an agency of the U.S. Department of the Interior 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 States, its natural resources, and the natural hazards ...

  4. List of U.S. states and territories by elevation - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._states_and...

    Enlargeable U.S. map with state and territory high points shown as red dots and low points as green squares except where low point is a shoreline. Enlargeable map of the 50 U.S. states by mean elevation. This list includes the topographic elevations of each of the 50 U.S. states, the District of Columbia, and the U.S. territories. [1]

  5. Geology of Texas - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Texas

    Geology of Texas. Texas contains a wide variety of geologic settings. The state's stratigraphy has been largely influenced by marine transgressive-regressive cycles during the Phanerozoic, with a lesser but still significant contribution from late Cenozoic tectonic activity, as well as the remnants of a Paleozoic mountain range.

  6. Topographic map - Wikipedia

    en.wikipedia.org/wiki/Topographic_map

    In modern mapping, a topographic map or topographic sheet is a type of map characterized by large- scale detail and quantitative representation of relief features, usually using contour lines (connecting points of equal elevation), but historically using a variety of methods. Traditional definitions require a topographic map to show both ...

  7. Geography of Texas - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Texas

    268,581 sq mi (695,620 km 2) Coastline. 367 mi (591 km) Highest point. Guadalupe Peak, 8,749 feet (2,667 m) Lowest point. Gulf of Mexico, sea level. The geography of Texas is diverse and large. Occupying about 7% of the total water and land area of the U.S., [1] it is the second largest state after Alaska, and is the southernmost part of the ...

  8. List of mountain peaks of Texas - Wikipedia

    en.wikipedia.org/.../List_of_mountain_peaks_of_Texas

    Peaks in the state of Texas [1] [2] [3] Mountain Peak Elevation Prominence Isolation Location Mountain range County; Guadalupe Peak: 8,751 ft 2667 m: 3,031 ft 924 m: 72.6 mi 116.9 km Guadalupe Mountains: Culberson: Bush Mountain: 8,631 ft 2631 m: 951 ft

  9. The National Map - Wikipedia

    en.wikipedia.org/wiki/The_National_Map

    The National Map is a collaborative effort of the United States Geological Survey (USGS) and other federal, state, and local agencies to improve and deliver topographic information for the United States. [1] The purpose of the effort is to provide "...a seamless, continuously maintained set of public domain geographic base information that will ...