- 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 the features of contour lines explain with diagram?
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 3 basic features of a landform do contour lines show?
Contours make it possible to show the height and shape of mountains, the depths of the ocean bottom, and the steepness of slopes . USGS topographic maps also show many other kinds of geographic features including roads, railroads, rivers, streams, lakes, boundaries, place or feature names, mountains, and much more.
What are the four basic principles 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 the features of contour line?
- Contour lines must close, not necessarily in the limits of the plan.
- Widely spaced contour indicates flat surface.
- Closely spaced contour indicates steep ground.
- Equally spaced contour indicates uniform slope.
- Irregular contours indicate uneven surface.
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 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 the contour lines called?
a line parallel to a trace . Compare trace 1 (def. 11). Also called contour, level curve, level line.
What are the importance of contour lines?
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.
What is the other name of contour lines?
| contours hachures | isoheights isohypses | isolines |
|---|
What are topographic symbols?
A topographic map shows more than contours. The map includes symbols that represent such fea- tures as streets, buildings, streams, and vegetation . These symbols are con- stantly refined to better relate to the features they represent, improve the appearance or readability of the map, or reduce production cost.
What are examples of topographic features?
Topographical Features
Examples include mountains, hills, valleys, lakes, oceans, rivers, cities, dams, and roads . Elevation – The elevation, or height, of mountains and other objects is recorded as part of topography. It is usually recorded in reference to sea level (the surface of the ocean).
What are three physical features?
Landforms include hills, mountains, plateaus, canyons, and valleys , as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great ocean basins.
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.
