Contour lines are lines drawn on a map connecting points of equal elevation, meaning if you physically followed a contour line, elevation would remain constant. Contour lines show elevation and the shape of the terrain. They're useful because they illustrate the shape of the land surface -- its topography-- on the map.


What 2 types of lines show elevation differences? 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 do contour lines indicate?

In cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

What are the 5 Rules of contour lines? Rule 1 - every point of a contour line has the same elevation. Rule 2 - contour lines separate uphill from downhill. Rule 3 - contour lines do not touch or cross each other except at a cliff. Rule 4 - every 5th contour line is darker in color.

what are 3 types of contour lines?

There are 3 kinds of contour lines you'll see on a map: intermediate, index, and supplementary.

What is the space between contour lines called? The space between the contour lines is called the contour interval and represents a specific (set) distance. If the contour interval is 50 feet, the vertical space between the two contour lines is 50 feet.

where are contours used?

It is often used to show the heights, slopes and depths of valleys and hills. The space between two consecutive contour lines in a contour map is called as the contour interval which shows the difference in the elevation.

What is a depression contour line? Definition of depression contour. 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.

What do u mean by contour?

contour. Contour is the outline or shape of something. A shoe that fits well along the contours or shape of your foot is a good fit. Contour comes from the Italian contorno meaning "to draw a line," which is precisely what you are doing when you trace the contour of something.

Which lines are called contour lines? The thin brown lines snaking around a topographic map are called contour lines. All points along the same contour line are at the same elevation above sea level.

What is a contour line drawing?

Contour drawing, is an artistic technique used in the field of art in which the artist sketches the style of a subject by drawing lines that result in a drawing that is essentially an outline; the French word contour meaning, "outline".

Who invented contour lines?

Charles Hutton

What is contour planning?

Contour plans are a graphical representation of the lay of the land. They show the degree of slope on a site. They typically relate back to a site datum.

What are the methods of contouring?

There are two methods of locating contours: Direct method. Indirect method. Direct method- In direct method contour to be plotted is actually traced on the ground. Procedure- The work is started from BM and the level is set up at the centre of the area.

What is the distance between contour lines?

Contour lines (thinner lines) between index contours are called intermediate contour lines. In the map shown below, the elevation difference between index lines is 100 meters. The elevation difference or vertical distance between two adjacent contour lines would be 20 meters (100 : 5 = 20).