contour-line

Definition
  1. Noun:
    • A line on a map joining points of equal elevation: A "contour line" is a line drawn on a topographic map that connects points of the same height above a reference level, usually sea level. It is used to represent the shape and elevation of the land surface.
    • A line representing a constant value on a graph: In mathematics or data visualization, a "contour line" connects points of equal value in a field, such as temperature or pressure on a weather map.
Usage Examples
  • Noun:
    • The hiker used the contour lines on the map to estimate the steepness of the trail. (The lines showing equal elevation helped judge the slope.)
    • On a weather chart, contour lines indicate areas of equal atmospheric pressure. (Lines connecting points with the same pressure value.)
Advanced Usage

  • "Contour line interval": The vertical distance between adjacent contour lines on a map, indicating the change in elevation.

    • The map has a contour line interval of 10 meters, meaning each line represents a 10-meter rise in height. (The spacing shows the elevation change.)

  • "Index contour line": A thicker or darker contour line, usually labeled with the elevation value, appearing every fifth contour line to aid readability.

    • The index contour line at 500 meters helped the surveyor quickly identify the overall terrain height. (A prominent line for reference.)
Variants and Related Words

  • Contour (noun): The outline or shape of something; the general form of a surface.

    • The contour of the hills was visible against the sky. (The outline or shape of the hills.)

  • Contoured (adjective): Having a shape or surface that follows a specific outline or pattern.

    • The contoured seat of the chair fits the body comfortably. (Shaped to match a specific form.)
Synonyms
  • Topographic line: A line showing elevation on a map (specific to geography).
  • Isoline: A general term for a line connecting points of equal value in any field (e.g., isobar for pressure, isotherm for temperature).
Related Idioms
  • To follow the contour: To go along the natural shape or curve of something, rather than a straight line.
    • The road follows the contour of the mountain, winding around it instead of going straight up. (To adapt to the land's shape.)
Additional Notes
  • Usage in mapping: Contour lines are essential for understanding terrain; closely spaced lines indicate steep slopes, while widely spaced lines indicate gentle slopes.
  • Mathematical context: In calculus, contour lines are used in contour plots to visualize functions of two variables.

Từ chứa "contour-line"