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 specific contour lines are increasing, the elevation of the terrain is also increasing
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 contour lines mean on a topographic map?
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 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
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
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
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
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 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 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
What do the contour lines represent?
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 does contour mean in drawing?
contour drawing, version of outline drawing, in which the artist, looking closely at the contour of an object, transfers it in one continuous line to paper without looking down to see what he is doing, except when he needs to place an internal feature such as an eye
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
What is an example of contour interval?
For example, a topographical map of an area near Denver might have index contours of 5,000′, 5,100′ and so on with a contour interval of 20 feet This means that there would be five “spaces,” and four non-index contour lines, between each index contour Often, index points are given along with index contours
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 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 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
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
How are contour lines drawn on maps?
Contour lines are lines drawn on a map with equal elevation points, so elevation would be constant if you followed the contour line physically The elevation and terrain shape of the contour lines shows It is useful because they show the form of the land surface on the map–its topography
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 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 are the methods of contouring?
There are basically 2 methods of contouring – Direct Method and Indirect Method Direct Method of Contouring : High degree of precision is required for large-scale maps with small contour interval Indirect Method of Contouring : It is suitable for undulated ground and hilly areas