- What are the 5 Rules of contour lines?
- Why do contour lines never cross?
- What is meant by contour interval?
- What is a depression contour line?
- How do contour lines show steep and gentle slopes?
- How are contour lines arranged in an area with a very steep slope?
- What is the highest contour line represent on the map?
- How do you tell if a slope is steep or gentle?
- How will a basin look different from a hill?
- When the contour lines are spaced far apart the slope is more?
- What do contour lines tell us?
- What does a steep slope look like on a topographic map?
- How are contour lines useful?
- What does it mean when contour lines are far apart?
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..
Why do contour lines never cross?
Contour lines can never cross one another. Each line represents a separate elevation, and you can’t have two different elevations at the same point.
What is meant by contour interval?
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. If the numbers associated with specific contour lines are increasing, the elevation of the terrain is also increasing.
What is a depression contour line?
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 do contour lines show steep and gentle slopes?
Slope (Steepness) This slope can be determined from the map by studying the contour lines—the closer the contour lines, the steeper the slope; the farther apart the contour lines, the gentler the slope.
How are contour lines arranged in an area with a very steep slope?
In hilly areas, the contour lines are close together while they are wider apart on flat slopes. The closer the contour lines, the steeper the slope. The wider the contour lines, the flatter the slopes.
What is the highest contour line represent on the map?
The innermost ring at the center of several contour loops almost always represents a peak (highest elevation). Sometimes the peak will be represented with a small X and number denoting elevation.
How do you tell if a slope is steep or gentle?
The space between contour lines reflects the slope. When contour lines are closer to each other, then slope is called steep slope. When contour lines are further apart from each other, then slope is gentle slope.
How will a basin look different from a hill?
In geology, a basin is defined as a bounded area where the rock within the boundaries dips inward toward the center. By contrast, a range is a single line of mountains or hills forming a connected chain of land higher than the surrounding area. When combined, the two make up basin and range topography.
When the contour lines are spaced far apart the slope is more?
Closely spaced contour lines represent steep slopes, conversely, contour lines that are spaced far apart represent gentle slopes. 3.
What do contour lines tell us?
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 does a steep slope look like on a topographic map?
Closely-spaced contour lines indicate a steep slope, because the elevation changes quickly in a small area. Contour lines that seem to touch indicate a very steep rise, like a cliff or canyon wall. Broadly spaced contour lines indicate a shallow slope.
How are contour lines useful?
Contours are imaginary lines that join points of equal altitude above the same reference level, the sea level in most cases. The purpose of contour lines is to represent the tridimensional shape of the terrestrial surface on a bidimensional map.
What does it mean when contour lines are far apart?
Contour lines that are relatively close together indicate a slope that is fairly steep. Contour lines that are further apart indicates a slope that is relatively flat.