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. Index contours are bold or thicker lines that appear at every fifth contour line.
Likewise, what is an index contour?
Definition of index contour. A contour line shown on a map in a distinctive manner for ease of identification, being printed more heavily than other contour lines and generally labeled with a value (such as figure of elevation) along its course.
Furthermore, what is the distance between contour lines? Contour lines (thinner lines) between index contours are called intermediate contour lines. In the map shown below, the elevation difference between index lines is 100 meters. The elevation difference or vertical distance between two adjacent contour lines would be 20 meters (100 : 5 = 20).
Also to know is, what is meant by contour interval?
Definition of contour interval. : the vertical distance between the elevations represented by adjacent contour lines on a map.
What is the definition of depression contour?
Definition of depression contour. A closed contour, inside of which the ground or geologic structure is at a lower elevation than that outside, and distinguished on a map from other contour lines by hachures marked on the downslope or downdip side.
How is an index contour usually indicated?
Answer: Contour lines are described as the places having equal elevation and they never intersect one another. The index contours are the contour lines that are usually highlighted by a thicker contours, dark in color and they are shown as every fifth contours.How do you determine elevation?
How to find elevation on Google Maps in a web browser- Type your location into the search bar on the left side.
- Click the "Menu" bar, which is next to the search bar and is represented by the three horizontal lines in the top-left.
- Hit "Terrain" to show topography and elevation.
How do you find the slope of a contour line?
To find the slope of a feature, the horizontal distance (run) as well as the vertical distance (rise) between two points on a line parallel to the feature need to be determined. The slope is obtained by dividing the rise over run. Multiply this ratio by 100 to express slope as a percentage.Can contour lines cross?
Answer and Explanation: Contour lines never cross on a topographic map because they represent the same elevation of the land. A particular point of land cannot be at more than one elevation, so only one contour line will pass through that spot. All the points along that contour line on the map will be at 2,500 feet.What is contour gradient?
Explanation: Contour gradient is a line lying throughout on the surface of the ground and preserving a constant inclination to the horizontal. If a level is used to locate the contour gradient, it is not necessary to set the level on the contour gradient.What is a contour profile?
A topographic profile or topographic cut is a representation of the relief of the terrain that is obtained by cutting transversely the lines of a topographic map. Each contour line can be defined as a closed line joining relief points at equal height above sea level.What is a contour interval answers?
Answers and Solutions Answer: Contour Lines and Intervals. 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.What is the factors affecting contour interval?
FACTORS FOR DECIDING CONTOUR INTERVAL- Scale of the map. The contour interval is kept inversely proportional to the scale of the map.
- Purpose of the map. The contour interval on a map also depends upon the purpose for which the map is to be utilized.
- Nature of the ground.
- Availability of time and funds.
What are the characteristics of contour lines?
Other characteristics of contour lines are: - Uniform slopes have uniformly spaced lines. - 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.How do contour lines show a steep slope?
When contour lines are closer together on a map, they indicate a steep slope. Think of contour lines as the distance between each incline. The closer together the inclines, the steeper the hill. On the other hand, the farther apart lines tend to indicate a depression in the landscape.What are the 3 types of contour lines on a map?
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.
- Intermediate lines are the thinner, more common, lines between the index lines.
