What are elevation lines called? 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 do you read elevation lines?
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 are the types of contour lines?
Contour lines are of three different kinds. They are the Index lines, Intermediate lines and the Supplementary lines.
What contour lines mean?
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 an index line?
Index lines are the thickest contour lines and are usually labeled with a number at one point along the line. This tells you the elevation above sea level. 2. Intermediate lines are the thinner, more common, lines between the index lines.
Related guide for What Are Elevation Lines Called?
What are the four types of contour lines?
There are several different types of contour line drawings:
Where contour line is used?
"Contour line" is the most common usage in cartography, but isobath for underwater depths on bathymetric maps and isohypse for elevations are also used. In cartography, the contour interval is the elevation difference between adjacent contour lines. The contour interval should be the same over a single map.
How contour line is useful?
Contour lines are very important in teaching natural sciences because they represent relief in an accurate way. Relief is controlled by rock type and geological structures. These two factors influence in the location and shape of rivers, which in terms, help the development of soils and vegetation.
How do you tell if contour lines are going up or down?
Remember contour numbering reads up hill – in other words the top of the number is uphill and the bottom is downhill. Also remember the closer contour lines are together, the steeper the slope.
Why do the contour lines represent?
Contour lines are lines on a map which join places of equal elevation or height, above or below sea level. Contour maps and contour lines help us visualise the topography of land, with regards to elevation or height.
How many feet of elevation are there between contour lines?
These lines are evenly spaced apart. We call this spacing the contour interval. For example, if your map uses a 10-foot contour interval, you will see contour lines for every 10 feet (3 meters) of elevation — lines at 0, 10, 20, 30, 40 and so on. Different maps use different intervals, depending on the topography.
What happens if you walk along a contour line?
If you walk along a contour line you will not go uphill or downhill. Each line connects all points of a specific elevation. Contour lines never cross since a single point can only have one elevation. Every fifth contour line is bolded and labeled.
How do you find the difference in elevation between index contours?
What color in the legend represents areas below sea level?
On physical maps, blues are used for water, with darker blues representing the deepest water. Green-gray, red, blue-gray, or some other color is used for elevations below sea level.
What is the name of this topographic quadrangle?
The United States was systematically divided into precise quadrangles based on latitude and longitude lines and these maps are commonly referred to as “quads.” This chapter starts with tips on how to read the margins of a topographic map.
How can I find the elevation of my house?
The website veloroutes.org/elevation has a map of the world where you can find the elevation of any address. Just type in the full address that you want to look up. The elevation will appear in the text above the map.
What is considered high elevation?
High altitude: 8,000 to 12,000 feet above sea level. Very high altitude: 12,000 to 18,000 feet. Extremely high altitude: 18,000+ feet.
What are intermediate contour lines?
A contour line drawn between index contours. Depending on the contour interval there are three or four intermediate contours between the index contours. See also index contour line. Dictionary of Military and Associated Terms.
What are the five major terrain features?
The five major terrain features are: Hill, Ridge, Valley, Saddle, and Depression. The three minor terrain features are: Draw, Spur and Cliff. The two supplementary terrain features are: Cut and Fill. A HILL is a point or small area of high ground.
What are the features of contour lines?
Characteristics of Contours
What is the other name of contour?
Some common synonyms of contour are outline, profile, and silhouette.
Why do two contours never intersect each other?
Two contours never intersect each other because each line represents a separate elevation, and we can't have two different elevations at the same point.
Who invented contour lines?
But as with most things in this human-built world, contour lines had to be invented. Their origins lie with Charles Hutton, a British mathematician whose ambitious 1774 survey of a Scottish peak called Schiehallion marked their first known use.
What is V rule?
The V-rule is one of the most important ways of determining quickly the dip of planar features, i.e. the map pattern of a planar surface (e.g. fault or bedding) 'V's in the direction that it dips. This paper model shows a valley that is perpendicular to the strike of a faulted sequence and a fault.