What do contours on maps indicate?
What do contours on maps indicate?
Contour line, a line on a map representing an imaginary line on the land surface, all points of which are at the same elevation above a datum plane, usually mean sea level. The diagram illustrates how contour lines show relief by joining points of equal elevation.
What is the contour interval on this map?
A contour interval is a vertical distance or difference in elevation between contour lines. Index contours are bold or thicker lines that appear at every fifth contour line. A contour interval in the survey is the vertical distance or the difference in elevation between the two contour lines on a topographic map.
How do you read contours on a topographic map?
How To Read Contour Lines
- 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.
- Supplementary lines appear as dotted lines, indicating flatter terrain.
What does a cliff look like on a map?
Cliff: A cliff is a vertical or near vertical feature; it is an abrupt change of the land. Cliffs are also shown by contour lines very close together and, in some instances, touching each other.
What’s a depression contour lines?
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.
When someone wants to depict a depression in a contour map they use?
Contour lines are used in a map to portray differences in elevation. When contour lines are closer together on a map, they indicate a steep slope. On the other hand, the farther apart lines tend to indicate a depression in the landscape. Another way to tell elevation is the numbers on the map
What is the proper way to label a depression crater?
Contour lines that show a depression, crater, or sinkhole on a map are represented by dashed lines (hachure marks) on the inside of a contour line. The elevation of the first depression contour is the same as the nearest regular contour line.
What is the rule of V’s?
The following rule (the Rule of “Vs”) os helpful for determining the general dip of a bed on a geological map or block diagram if it is not shown by a symbol: “Where a contact crosses a valley, it forms a “V”, the apex of which points in the direction of dip of the contact (Fig. 1 A,B).”
What does the narrow bottom of a V shaped contour pointing uphill indicate?
The “V” shape contours indicate streams and drainage. As you can see, the “V” points uphill to a higher elevation.
What do the contour lines do when they cross Green River?
What do the contour lines do when they cross Green River? They point upstream and show that the river flows out of the “V”
Why do contour lines bend upstream?
Relief = Maximum elevation – Minimum elevation Contour lines trend up valleys, cross streams, and return down the valleys on the opposite side, thus forming a V (or a U) that points upstream: A contour line bends upstream when crossing a stream and forms a V whose apex or point always points upstream.
Which map scale would give you the largest area?
A large scale map shows greater detail because the scale is a larger fraction than a small scale map. Large scale maps have a scale of 1:50,000 or greater (1:24,000, 1:10,000.). Maps with scales from 1:50,000 to 1:250,000 are considered intermediate. Small scale maps are those with scales smaller than 1:250,000.
What is a gentle slope?
A gentle slope or curve is not steep or severe.
How do you know which slope is steepest?
1 Expert Answer Compare the slopes of the 4 equations, which is the number in the term with “x”. The slope with highest absolute value is the steepest. Positive slope means the function is ascending left to right, negative slope means it is descending left to right