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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. Wikipedia : WikiProject Maps/Source materials

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

    Comes with map data derived from two public domain databases. United Nations Cartographic Section has many free maps in PDF format, at least some with the layers intact. However most UN maps are under UN copyright, so check before uploading. See here for their policy, this page about requesting permission. USGS Maps. Every USGS topographic map ...

  4. 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 ...

  5. Reservoir modeling - Wikipedia

    en.wikipedia.org/wiki/Reservoir_modeling

    Screenshot of a structure map generated by Contour map software for an 8500ft deep gas & Oil reservoir in the Erath field, Vermilion Parish, Erath, Louisiana. The left-to-right gap, near the top of the contour map indicates a Fault line. This fault line is between the blue/green contour lines and the purple/red/yellow contour lines.

  6. Marching squares - Wikipedia

    en.wikipedia.org/wiki/Marching_squares

    Typical applications include the contour lines on topographic maps or the generation of isobars for weather maps. Marching squares takes a similar approach to the 3D marching cubes algorithm: Process each cell in the grid independently. Calculate a cell index using comparisons of the contour level(s) with the data values at the cell corners.

  7. Reservoir simulation - Wikipedia

    en.wikipedia.org/wiki/Reservoir_simulation

    Representation of an underground fault by a structure map generated by Contour map software for an 8500ft deep gas & Oil reservoir in the Erath field, Vermilion Parish, Erath, Louisiana. The left-to-right gap, near the top of the contour map, indicates a Fault line. This fault line is between the blue/green contour lines and the purple/red ...

  8. List of online map services - Wikipedia

    en.wikipedia.org/wiki/List_of_online_map_services

    Online maps can be basically divided by the covered area (global or local) and by the representation of this area (classic drawn or orthophoto). Global online maps [ edit ] These maps cover the world, but may have insufficient details in some areas.

  9. 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 ...