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  2. Wide and narrow data - Wikipedia

    en.wikipedia.org/wiki/Wide_and_narrow_data

    The process of converting a narrow table to wide table is generally referred to as "pivoting" in the context of data transformations. The "pandas" python package provides a "pivot" method which provides for a narrow to wide transformation.

  3. ACN-PCN method - Wikipedia

    en.wikipedia.org/wiki/ACN-PCN_method

    Ultralow strength: characterized by K = 20 MN/m^3 and representing all K values below 25 MN/m^3 for rigid pavements, and by CBR = 3 and representing all CBR values below 4 for flexible pavements D: Maximum allowable tire pressure: Unlimited: no pressure limit W: High: limited to 1.75 MPa X: Medium: limited to 1.25 MPa Y: Low: limited to 0.50 MPa Z

  4. Heightmap - Wikipedia

    en.wikipedia.org/wiki/Heightmap

    A heightmap contains one channel interpreted as a distance of displacement or "height" from the "floor" of a surface and sometimes visualized as luma of a grayscale image, with black representing minimum height and white representing maximum height. When the map is rendered, the designer can specify the amount of displacement for each unit of ...

  5. Aeronautical chart conventions (United States) - Wikipedia

    en.wikipedia.org/wiki/Aeronautical_chart...

    A sectional chart is a two-sided chart created from a Lambert Conformal Conic Projection [1] with two defined standard parallels. The scale is 1:500,000, with a contour interval of 500 feet. The size of each sectional is designed to be "arm's width" when completely unfolded.

  6. Elevated highway - Wikipedia

    en.wikipedia.org/wiki/Elevated_highway

    Engineering of paving, exit orientation, turn radius, drainage, curb height, ramp length, speed optimization, shoulders, maintenance procedures, noise abatement, and minimizing the "highway wall" effect that could divide communities, were all improved in the 1940s through 1970s, partially by examining the deficiencies of this early elevated ...

  7. Help:Advanced table formatting - Wikipedia

    en.wikipedia.org/wiki/Help:Advanced_table_formatting

    For example, nested tables (tables inside tables) should be separated into distinct tables when possible. Here is a more advanced example, showing some more options available for making up tables. Users can play with these settings in their own table to see what effect they have.

  8. Ramp travel index - Wikipedia

    en.wikipedia.org/wiki/Ramp_travel_index

    RTI ramp Modified Jeep ramping an RTI ramp Ramp travel index or RTI, is a way of measuring a vehicle's ability to flex its suspension, a property also known as axle articulation. The RTI rating is used mainly in the off-roading industry to test and describe chassis limits of modified vehicles.

  9. Normal shock tables - Wikipedia

    en.wikipedia.org/wiki/Normal_shock_tables

    The tables below have been calculated using a heat capacity ratio, , equal to 1.4. The upstream Mach number, M 1 {\displaystyle M_{1}} , begins at 1 and ends at 5. Although the tables could be extended over any range of Mach numbers, stopping at Mach 5 is typical since assuming γ {\displaystyle \gamma } to be 1.4 over the entire Mach number ...