- What do contours on maps indicate?
- What is the shape of contour lines?
- What do the distance between contour lines indicate?
- How do you tell if contour lines are going up or down?
- How many types of contour lines are there?
- What is the rule of V’s?
- What are the 5 Rules of contour lines?
- What is the other name of contour lines?
- What is the importance of contour lines?
- What are the basic features of contour lines?
- What would the topography of an area be like if the contour lines were close together?
- When land is steep contour lines lie farther apart?
- What are 3 types of contour lines?
- Why do contour lines never cross?
What do contours on maps indicate?
In cartography, a contour line (often just called a “contour”) joins points of equal elevation (height) above a given level, such as mean sea level.
A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes..
What is the shape of contour lines?
The less separation between contour lines means a steeper slope and vice versa. When there are evenly spaced contours, the slope is uniform. At a stream junction, contour lines form a “M” or “W” shape. This can be interpreted as two “V-shaped contours intersecting.
What do the distance between contour lines indicate?
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. … If the numbers associated with the contour lines are decreasing, there is a decrease in elevation.
How do you tell if contour lines are going up or down?
Remember contour numbering reads up hill – in other words the top of the number is uphill and the bottom is downhill. Also remember the closer contour lines are together, the steeper the slope.
How many types of contour lines are there?
3 kindsThere are 3 kinds of contour lines you’ll see on a map: intermediate, index, and supplementary. 1. 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 is the rule of V’s?
The Rule of V’s: When a bed crosses a valley, the outcrop pattern of the bed will ‘V’ or curve in the direction that the bed is dipping in map view. Conversely, when a sedimentary bed crosses a ridge, it will ‘V’ in the direction opposite to its dip. … A horizontal bed will parallel topographic contours on a map.
What are the 5 Rules of contour lines?
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. Rule 4 – every 5th contour line is darker in color.
What is the other name of contour lines?
Also called contour, level curve, level line.
What is the importance of contour lines?
The purpose of contour lines is to represent the tridimensional shape of the terrestrial surface on a bidimensional map. Contour lines are the intersection of an horizontal plane parallel to the reference level and the topographical surface to describe. Consequently: Contour lines are always closed curves.
What are the basic features of contour lines?
Other characteristics of contour lines are: – Horizontal distance between contour lines is inversely proportional to slope. – Uniform slopes have uniformly spaced lines. – Along plane surfaces, contour lines are straight and parallel. – Contour lines are perpendicular to lines of steepest slopes.
What would the topography of an area be like if the contour lines were close together?
If contour lines are close together, it is a very steep slope; if they are far apart, it is a gradual slope.
When land is steep contour lines lie farther apart?
The contour lines mark where the land surface is one inch higher than the previous contour line. If the land surface is steep, the contour lines will be closer together. If the land surface is gently sloping, the contour lines will be farther apart.
What are 3 types of contour lines?
Contour Interval – Types of Contour Lines: Index, Intermediate, Supplementary.
Why do contour lines never cross?
Answer and Explanation: Contour lines never cross on a topographic map because each line represents the same elevation level of the land.