Contour intervals reveal how much vertical distance there is between each contour line Closely spaced contour lines indicate very steep slopes Contour lines that are sharply tapered indicate an uphill direction Rounded contour lines typically indicate a downhill direction
What is a contour interval on a topographic map?
Individual contour lines on a topographical map are a fixed interval of elevation apart known as a contour interval Common contour intervals are 5, 10, 20, 40, 80, or 100 feet The actual contour interval of a map depends upon the topography being represented as well as the scale of the map
What do the contour lines on a topographic map show?
Elevation contours are imaginary lines connecting points having the same elevation on the surface of the land above or below a reference surface, which is usually mean sea level Contours make it possible to show the height and shape of mountains, the depths of the ocean bottom, and the steepness of slopes
What is the 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 the contour interval of the map quizlet?
A contour line on a topographic map connects points of equal elevation The change in elevation from contour line to contour line is called the contour interval such as 1,600 or 2,000 feet
How do you find a contour interval?
What Is the Contour Interval Equal To? Divide the difference in elevation between the index lines by the number of contour lines from one index line to the next In the example above, the distance 200 is divided by the number of lines, 5 The contour interval is equal to 200 / 5 = 40, or 40-unit contour intervals
What phrase describes a contour interval?
Which best describes the location of the picnic area? Two creeks flow through the picnic area Several steep slopes are found inside the picnic area The elevation changes from 635 to 600 at the picnic area
What is the contour interval Quizizz?
The Contour Interval (CI) is the difference in elevation from one contour line to the next Usually, every line isn’t marked so you have to determine the CI yourself
How do contour lines determine elevation?
You can figure out the elevation of any point by finding the nearest labeled line, counting the number of lines above or below it, multiplying by the contour interval, and adding or subtracting the result from the nearest marked contour line The more closely spaced the contour lines, the steeper the slope
What is a contour index?
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
What is a contour interval and on what factors does it depend?
The contour interval depends upon the general topography of the terrain In flat ground, contours at small intervals are surveyed to depict the general slope of the ground whereas high hills can only be depicted with contours at larger contour interval
What contour interval would you suggest for a hilly survey?
Contour intervals for flat ground are generally small, eg 025m, 05m, 075m etc Contour interval for a steep slope in a hilly area is generally greater ie 5m, 10m 15m etc
What is the difference between contour interval and horizontal equivalent?
Contour Interval: The constant vertical distance between two consecutive contours is called the contour interval Horizontal Equivalent: The horizontal distance between any two adjacent contours is called as horizontal equivalent while the horizontal equivalent is variable and depends upon the slope of the ground
What do contour intervals on a topographic map show quizlet?
What is the contour interval on a map based on? The relief in the area The difference in elevation between the highest and lowest points in the area on the map
What is meant by the contour interval on a topographic map quizlet?
contour interval the difference in altitude represented by the space between two contour lines on a map any of the spaces between vertical lines on a topographic map or globe Contour line a line on a map joining points of equal height above or below sea level
What is the function of contour lines on a map?
Contour lines are curved, straight or a mixture of both lines on a map describing the intersection of a real or hypothetical surface with one or more horizontal planes The configuration of these contours allows map readers to infer the relative gradient of a parameter and estimate that parameter at specific places
Why don t all topographic maps have the same contour interval?
Contour lines are used to represent elevation on a contour map Each contour line represents a different elevation, and you can’t have two different elevations at the same point An example would be how 500 meters above sea level will never be equivalent to 1000 meters above sea level
Why are contours important in map reading?
These contour lines are an important way of showing the rise and fall of the land on a map Contour lines show all the places that are the same height above sea level They also tell us about the slope of the land On a steep slope, the lines are close together
What is contour interval apex?
The contour interval (how many meters or feet there are between adjacent contour lines) remains the same over a map, unless exceptions are noted in the legend Contour lines form a V-pattern crossing streams The “V” always points upstream, and its apex is always in the stream channel
What are contour lines in geography?
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 map: contour lines
How far apart are contour lines on a map?
A contour is a line drawn on a map that joins points of equal height above sea level For 1:25 000 scale maps the interval between contours is usually 5 metres, although in mountainous regions it may be 10 metres