The constant vertical distance between two adjacent contours is called____________.
Contour Interval Definition
The question asks for the specific term used to describe the consistent vertical separation between neighbouring contour lines on a topographical map.
Understanding Contour Lines
Contour lines connect points of equal elevation. The spacing and characteristics of these lines provide information about the terrain.
- Vertical Distance: This refers to the difference in height (elevation) above a reference point (like sea level).
- Adjacent Contours: These are contour lines that are next to each other on the map.
Identifying the Correct Term
The standard definition for the constant vertical difference in elevation between two adjacent contour lines is the contour interval. This value is typically stated in the map's legend.
Comparing Options
- Contour Interval: Directly matches the definition of constant vertical distance between adjacent contours.
- Horizontal Interval / Horizontal Equivalent: These terms relate to the *horizontal* distance on the map between contour lines, which varies depending on the steepness of the slope, not the constant vertical separation.
- Vertical Equivalent: This is not the standard term used for the vertical distance between contours.
Therefore, the constant vertical distance between two adjacent contours is defined as the contour interval.
Important Questions from Contouring
Which of the following statements are CORRECT for contour map?
1) Parallel contour shows uniform slope.
2) Very closed contour shows steep slope.
3) Very closed contour shows flat area.
4) Two contours at different elevation cut at right angle.While drawing a cross-section of a contour map, the following values were noted from point A to point B on a strip of paper to draw the graph - 500 m, 400 m, 300 m, 200 m, 200 m, 300 m, 400 m, 500 m.
Which cross-section would be drawn by using the above values?
Identify the correct statements.
i. Contour lines form sharp V-shaped curves across valley line, with the convex side of the curve towards the higher ground.
ii. Contour lines form U-shaped curves across valley line, with the convex side of the curve towards the higher ground.
iii. Contour lines form U-shaped curves across ridge line, with the concave side of the curve towards the higher ground.
iv. Contour lines form sharp U-shaped curves across ridge line, with the convex side of the curve towards the higher ground.
In case of uniform slope, the contour lines:
Contour lines cross a watershed or ridge line at _____ .
