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questions & answers.
Q1.
Give the term used in contours for each of the following:
- A number preceded by a dot.
- The numerical difference between two contour lines.
- A number preceded by a triangle.
- The difference between maximum and minimum height in areas of steep slope.
- The accurate height of some point marked above the ground.
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Answer:
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- Spot height
- Contour interval
- Triangulated height
- Relative height
- Triangulated height
Q2.
Describe the term Contour Interval.
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Answer:
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Contour interval means the difference of height between two consecutive contours.
Q3.
Describe the term Vertical Interval.
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Answer:
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Vertical interval is the distance between any two contour lines. In 1:50,000 Survey sheets of India, the contour interval is 20 metres.
Q4.
Describe the term Horizontal Equivalent.
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Horizontal equivalent is the actual distance between two points on two contour lines.
Q5.
Describe the term Gradient.
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Answer:
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Gradient refers to the slope of land. It determines the steepness of a slope. It is the ratio between the vertical height and the horizontal distance measured along the ground.
