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  2. Digital geologic mapping - Wikipedia

    en.wikipedia.org/wiki/Digital_geologic_mapping

    The thin red circular contour line in the middle of the map indicates the top of the oil reservoir. Because gas floats above oil, the thin red contour line marks the gas/oil contact zone. Digital geologic mapping is the process by which geological features are observed, analyzed, and recorded in the field and displayed in real-time on a ...

  3. Geologic modelling - Wikipedia

    en.wikipedia.org/wiki/Geologic_modelling

    The thin red circular contour line in the middle of the map indicates the top of the oil reservoir. Because gas floats above oil, the thin red contour line marks the gas/oil contact zone. Geologic modelling, geological modelling or geomodelling is the applied science of creating computerized representations of portions of the Earth's crust ...

  4. Generic Mapping Tools - Wikipedia

    en.wikipedia.org/wiki/Generic_Mapping_Tools

    Generic Mapping Tools (GMT) are an open-source collection of computer software tools for processing and displaying xy and xyz datasets, including rasterization, filtering and other image processing operations, and various kinds of map projections.

  5. OpenStreetMap - Wikipedia

    en.wikipedia.org/wiki/OpenStreetMap

    Map data is typically recorded on a GPS unit or on a smart phone with mapping app; a common file format is GPX. Once the data has been collected, it is entered into the database by uploading it onto the project's website together with appropriate attribute data.

  6. List of online map services - Wikipedia

    en.wikipedia.org/wiki/List_of_online_map_services

    Apple Maps - covers the whole country; Bing Maps – covers the whole country; Google Maps - covers the whole country; Libre Map Project; MapQuest - covers the whole country; The National Map by the United States Geological Survey.

  7. 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 ...

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    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. 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]

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