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What does the contour interval tell us?

What does the contour interval tell us?

A contour line is a line drawn on a topographic map to indicate ground elevation or depression. A contour interval is the vertical distance or difference in elevation between contour lines. If the numbers associated with specific contour lines are increasing, the elevation of the terrain is also increasing.

What does contour spacing tell us when looking at a topo map?

The more closely spaced the contour lines, the steeper the slope. You can find out exactly how steep the slope of the area you are interested in by subtracting the lowest elevation from the highest, and dividing the result by the horizontal distance. Horizontal distance is found on the scale.

What determines the contour interval used on a topographic map explain how it determines the interval?

Each contour line on the map repre- sents a definite ground elevation measured from mean sea level, and the contour interval is the difference in elevation between adjacent contours. The contour interval, together with the spacing of the contour lines on the . map, indicates the slope of the ground.

What is the contour interval of most topographic maps?

Contour lines have set intervals of 5m, 10m or 20m depending on the scale of the map. Contour intervals indicate the change in elevation from one contour line to the next and will always remain the same within a map.

What factors influence a cartographer’s choice of contour interval?

What factors might influence a cartographers choice of contour interval?

  • Scale of the map. The contour interval is kept inversely proportional to the scale of the map.
  • Purpose of the map.
  • Nature of the ground.
  • Availability of time and funds.

What is the difference between contour interval and horizontal equivalent?

Contour Interval: The constant vertical distance between two consecutive contours is called the contour interval. Horizontal Equivalent: The horizontal distance between any two adjacent contours is called as horizontal equivalent. while the horizontal equivalent is variable and depends upon the slope of the ground.

What is the elevation difference between contour lines?

The elevation difference between two adjacent contour lines is called the contour interval (CI). Usually the contour interval is noted on the map legend. In most topographic maps every 5th contour line is drawn in bold print or wider than other contours.

What is the standard interval between contour lines on a map?

The space between the contour lines is called the contour interval and represents a specific (set) distance. If the contour interval is 50 feet, the vertical space between the two contour lines is 50 feet.

What is contour interval and what factor does it depend?

The contour interval depends upon the general topography of the terrain. In flat ground, contours at small intervals are surveyed to depict the general slope of the ground whereas high hills can only be depicted with contours at larger contour interval.

What are intermediate contour lines?

intermediate contour line. A contour line drawn between index contours. Depending on the contour interval there are three or four intermediate contours between the index contours.

What is the definition of a topographic map?

A topographic map is a detailed and accurate illustration of man-made and natural features on the ground such as roads, railways, power transmission lines, contours, elevations, rivers, lakes and geographical names. What information is on a topographic map? Is a topographic map similar to a road map?

What is a topographic line?

Topographic maps conventionally show topography, or land contours, by means of contour lines. Contour lines are curves that connect contiguous points of the same altitude (isohypse). In other words, every point on the marked line of 100 m elevation is 100 m above mean sea level.

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