What two types of lines show elevation differences answer choices?
Topographic maps have contour lines that connect points of identical elevation above sea level. Contour lines run next to each other. Adjacent contour lines are separated by a constant difference in elevation, usually noted on the map. Topographic maps have a horizontal scale to indicate horizontal distances.
What is the elevation of the highest contour line on the Hill?
599 meters
Are contour lines always closed?
Contour lines always close to form an irregular circle. Note that sometimes contour lines extend beyond the area on a map so you may not see the entire closed circle.
How do the lines indicate which side of the mountain is the steepest?
Contour lines that are close together indicate a steep slope. This is because the elevation changes quickly in a small area. Contour lines that seem to touch indicate a very steep slope, like a cliff.
How many feet of elevation are there between contour lines?
Two contour lines next to one another are separated by a constant difference in elevation (such as 20 ft or 100 ft). This difference between contour lines is called the contour interval.
Can contour lines repeat?
When reading contour lines, special notice should be given to contour lines that repeat on a map. As you come out of the depression, you cross those same lines again. If there is a depression on a steep slope, on the uphill portion of the slope the contour lines will not repeat.
How is a gentle slope represented by contour lines?
Gentle slopes (low angle from horizontal) on topographic maps with a given interval will be represented by widely spaced contour lines. Steep slopes (high angles from the horizontal) on topographic maps with a given contour interval will be represented by closely spaced contour lines.
What is the value of the first depression contour line?
The elevation of the first depression contour is the same as the nearest regular contour line. The lowest possible elevation for a depression is one more than what the next contour should be. The lowest possible elevation of a depression is just above the value of the next line that is not shown.
What does it mean when contour lines are Hachured?
hachured contour. [symbology] On a topographic map, concentric contour lines drawn with hachures to indicate a closed depression or basin. Concentric contour lines drawn without hachure marks indicate a hill.
What is Hachuring used for?
Hachures are still used today on Large Scale maps to show slopes and on British Ordnance Survey Maps and also in various countries toposheets to show Road and Railway Cutting and Embankments.
Which direction do Hachures point?
instead short dashes called hachures are used to indicate depression. Hachures are drawn perpendicular to the contour line that loops around a depression. The hachures point to the inside of the loop.
What advantages do contours have over hill shading and Hachuring?
what advantage do contour have on hillshading and hachuring ? ( geography ) (a)They are easy to draw while the hillshading and hachuring are time consuming . (b)The contours gives us more detailed information than the other two .
How do rivers affect contour lines?
A general rule of thumb is that water flow is perpendicular to contour lines. Water always flows downhill perpendicular to the contour lines. As one proceeds upstream, successively higher and higher contour lines first parallel then cross the stream. This is because the floor of a river valley rises as you go upstream.
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 direction does water usually flow relative to contour lines?
As a general rule, water flows downhill perpendicular to contour lines.
How do contour lines show the direction a river flows?
The arrow below points to the direction the water flows, which is always downhill. If you need help remembering, think of it this way: the contours at a stream or river are in a “V” or “U” shape. The water flows out of the opening of the V or U shape and the closed end points uphill.