Can you reduce the number of contour lines?

What are the four rules concerning contour lines?

Every point on a contour line is of the exact same elevation.

• Every point on a contour line is of the exact same elevation.
• By definition, contour lines separate points of higher elevation from points of lower elevation.
• Contour lines never cross.
• Contour lines never split.

How do you change the contour interval?

Quote from video: We want to change this to a 20-foot interval. So click in the field for major interval. Change this to 20. And for the minor interval.

What are the 5 Rules of contour lines?

General Rules for contour lines Page 2 Page 3 A contour line connects points of equal elevation. A contour line never branches or splits Page 5 Steep slopes are shown by closely spaced contour lines. Contour lines never cross, but they may touch. Hills are represented by a concentric series of closed contour lines.

What are the factors affecting contour?

The contour interval depends upon the following factors:

• The scale of the map: The contour interval normally varies inversely to the scale of the map i.e., if the scale of the map is large, the contour interval is considered to be small and vice versa.
• Purpose of the map:
• Nature of ground:
• Time & Cost:
• Slope:

What are 3 things to remember when drawing with contour?

Rule 1 – every point of a contour line has the same elevation. Rule 2 – contour lines separate uphill from downhill. Rule 3 – contour lines do not touch or cross each other except at a cliff.

What are the 7 rules of contouring?

Terms in this set (7)

• All points on a contour line have the same elevation.
• Contour lines usually do not cross, intersect, or separate.
• Closely spaced contour lines represent steep slopes.
• Widely spaced contour lines represent gentle slopes.
• Contour lines form V’s when crossing a valley.

How do you reduce contour intervals in Civil 3d?

Quote from video: So the first thing if we want to change the contour interval is to select the surface by clicking art then come up to surface properties. And here is where you would normally pick.

Are contour intervals always the same?

Contour interval: The change in elevation from one contour line to the next is always the same within the same map. Many maps have either a 40- or 80-foot contour interval: An 80-foot interval simply means that each contour line is 80 vertical feet away from the next closest line.

What is a good contour interval?

Quote from video:

What are 3 types of contour lines?

There are 3 kinds of contour lines you’ll see on a map: intermediate, index, and supplementary. Index lines are the thickest contour lines and are usually labeled with a number at one point along the line. This tells you the elevation above sea level.
 

What are the 3 main qualities of a contour line?

Other characteristics of contour lines are:



– Along plane surfaces, contour lines are straight and parallel. – Contour lines are perpendicular to lines of steepest slopes. – For summits or depressions, contour lines most close upon themselves.

What are some of the rules we follow when making topographic maps?

The rules of topographic maps are:

• Each line connects all points of a specific elevation.
• Contour lines never cross since a single point can only have one elevation.
• Every fifth contour line is bolded and labeled.
• Adjacent contour lines are separated by a constant difference in elevation (such as 20 ft or 100 ft).