Civil Engineering - Surveying - Discussion

The First Characteristic of Contours is;

All the points lying on one contour line have the same elevation.

Therefore the contour line have the same elevation can unite together.

Different elevations of contours Do not unit and cross Together except in some cases. But in this question, There are no such cases. And also No Different elevations are there.

So, the Contour line has the same elevation they must unite together. They may cross each other.

But there is no chance to the same elevation of contour lines cross each other while drawing a contour line because all the points lying on one contour have the same elevation. Therefore the answer is They can unite together. Ans-D.

The contour lines having the same elevation cannot unite and continue as one line.

A contour can not end abruptly, but must ultimately close itself not necessarily within the limits of the map.

The direction of steepest slope at a point on a contour is at right angles to the contour.

Two contours of different elevations do not unite together except in the case of the vertical cliff but if there is the same height two contours can unite together.

The same height means contour are in the same line so option D is right.

Generally, two contours lines can't cross each other and also can't unit together. But there are two cases in which contours line cross each other i.e overhanging cliff and unit to gather i.e vertical cliff.

Two contour lines having the same elevation can not unite and continue as one. Similarly, a single contour line can not split in to two lines.

Hence option C is correct.

Contour lines depend upon elevation. Different elevation contour lines never intersect each other but with the same elevation, they unite i.e. they intersect each other.

All points in a contour have the same elevation. And close themselves either within or outside the limits of the map. So, the answer can unite together is correct.

@Suga.

They seem to meet because 2D representation cannot reproduce two or more stack curve separately. They cannot meet each other. They only stack.

Amit first goes through characteristics of contour lines. Answer is C.

Two contour lines of equal elevation cannot unite to form a single line.

> Contour lines of same elevation can unite to form single line only in the case of vertical cliff. Hence option D is correct.