enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. 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.

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

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

    The elevation range of the area. [e] All topographic elevations are adjusted to the North American Vertical Datum of 1988 (NAVD 88). All geographic coordinates are adjusted to the World Geodetic System of 1984 (WGS 84). The mean elevation for each state, the District of Columbia, and Puerto Rico are accurate to the nearest 100 feet (30 m).

  4. Elevation - Wikipedia

    en.wikipedia.org/wiki/Elevation

    In aviation, the term elevation or aerodrome elevation is defined by the ICAO as the highest point of the landing area. It is often measured in feet and can be found in approach charts of the aerodrome. It is not to be confused with terms such as the altitude or height. [1] Part of a topographic map of Haleakala , showing elevation.

  5. List of places on land with elevations below sea level

    en.wikipedia.org/wiki/List_of_places_on_land...

    The biggest dry land area below sea level that has been known to exist during the geological past, as measured by continuous volume of atmospheric air below sea level, was the dry bed of the Mediterranean Sea of the late Miocene period during the Messinian salinity crisis.

  6. Altitude - Wikipedia

    en.wikipedia.org/wiki/Altitude

    Pressure altitude is the elevation above a standard datum air-pressure plane (typically, 1013.25 millibars or 29.92" Hg). Pressure altitude is used to indicate "flight level" which is the standard for altitude reporting in the U.S. in Class A airspace (above roughly 18,000 feet).

  7. List of elevation extremes by country - Wikipedia

    en.wikipedia.org/wiki/List_of_elevation_extremes...

    Map of countries coloured according to their highest point. The following sortable table lists land surface elevation extremes by country or dependent territory. Topographic elevation is the vertical distance above the reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface.

  8. Height above mean sea level - Wikipedia

    en.wikipedia.org/wiki/Height_above_mean_sea_level

    Elevation or altitude above sea level is a standard measurement for: Geographic locations such as towns, mountains and other landmarks. The top of buildings and other structures. Mining infrastructure, particularly underground. Flying objects such as airplanes or helicopters below a Transition Altitude defined by local regulations. [2]

  9. The National Map - Wikipedia

    en.wikipedia.org/wiki/The_National_Map

    The National Map is part of the USGS National Geospatial Program. [3] 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 ...