What Are 3 Types Of Contour Lines?

Contour lines are of three different kinds. They are the Index lines, Intermediate lines and the Supplementary lines .

What is an example of a contour line?

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 3 qualities of contour line?

• Must close on themselves, on or off the map.
• Perpendicular to the direction of max. ...
• Slope between them is assumed uniform.
• The distance between them indicates the steepness of the slope, gentle or steep.
• Irregular signify rough, smooth signify gradual slopes.

What are contour lines on a map?

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.

What are 4 types of contour lines?

• Isopleth. Isopleth on a contour map connects the places having the same value of some measurable quantity of geographical or meteorological phenomena. ...
• Isohyet. ...
• Isobar. ...
• Isobath. ...
• Isohaline. ...
• Isotherm. ...
• Isohel. ...
• Isohume.

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 .

Does Google Earth show contour lines?

This KML network link displays a map overlay for USGS Contours (http://viewer.nationalmap.gov/) in Google Earth. To get started, simply download usgs-contours-overlay-for-google-earth. Or checkout all 4 USGS The National Map map overlays on this site. ...

How do you get contour lines?

The two ways to establish a contour map are the cross-section method and the trace contour method . To use the cross-section method, set a control or reference line at the center of the lot, then lay out and stake a grid; the elevation is determined at each stake in the grid relative to a benchmark.

How do you describe contour lines?

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 is contour and its characteristics?

Contours show distinct characteristic features of the terrain as follows: i) All points on a contour line are of the same elevation . ii) No two contour lines can meet or cross each other except in the rare case of an overhanging vertical cliff or wall. iii) Closely spaced contour lines indicate steep slope.

What are the uses of contouring?

• It depicture slope and size of different landforms on map.
• It provides complete and clear image of the land and the surrounding area.
• By reading contour interval it is easy to sort out the different elevation of the landscape.
• It provide the basis for coloring method.

What are the uses of contour lines?

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 the other name of contour lines?

What is major and minor contour lines?

The major contour lines at the decades are logarithmic values that are equally spaced , and the minor contour lines are linear values that are logarithmically spaced.

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.