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  2. Contour line - Wikipedia

    en.wikipedia.org/wiki/Contour_line

    A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes. [4] The contour interval of a contour map is the difference in elevation between successive contour lines. [5] The gradient of the function is always perpendicular to the contour ...

  3. Topographic map - Wikipedia

    en.wikipedia.org/wiki/Topographic_map

    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 ...

  4. Topographic profile - Wikipedia

    en.wikipedia.org/wiki/Topographic_profile

    A topographic profile or topographic cut or elevation profile is a representation of the relief of the terrain that is obtained by cutting transversely the lines of a topographic map. Each contour line can be defined as a closed line joining relief points at equal height above sea level. [ 1 ]

  5. Terrain cartography - Wikipedia

    en.wikipedia.org/wiki/Terrain_cartography

    The Tanaka (relief) contours technique is a method used to illuminate contour lines in order to help visualize terrain. Lines are highlighted or shaded depending on their relationship to a light source in the Northwest. If the object being illustrated would shadow a section of contour line, that contour would be represented with a black band.

  6. Wikipedia : WikiProject Maps/Conventions/Topographic maps

    en.wikipedia.org/wiki/Wikipedia:WikiProject_Maps/...

    Discussions have long for 2-3 years, with several update, to lead to this current web-friendly, screen friendly, and wiki-specific topo style. Leading place and future. Currently, the French team is leading this initiative on its Map Lab, according to Sting's French tutorials, and working according to specific requests.

  7. Trough (meteorology) - Wikipedia

    en.wikipedia.org/wiki/Trough_(meteorology)

    A trough is an elongated region of relatively low atmospheric pressure without a closed isobaric contour that would define it as a low pressure area. Since low pressure implies a low height on a pressure surface, troughs and ridges refer to features in an identical sense as those on a topographic map. Troughs may be at the surface, or aloft, at ...

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Orienteering map - Wikipedia

    en.wikipedia.org/wiki/Orienteering_map

    An orienteering map, and a compass, are the primary aids for the competitor to complete an orienteering course of control points as quickly as possible. [2] A map that is reliable and accurate is essential so that a course can be provided which will test the navigational skills of the competitor. The map also needs to be relevant to the needs ...