![]() ![]() These lines connect points of the same value. These regions consist of high topography and are vulnerable to rapid erosion.Ĭontours are imaginary lines. This crust has a thickness which is in excess of 50 km, this is almost a young and active mountain belt. For example, the crust located in western Australia is older compared to that in central Australia, yet the crust is a minimum of 10 km thinner in western Australia. The crust does not display the pattern of increased thickness with the increase in age, as this would be the case if the same were to be repeatedly subjected to the igneous intrusions which are from the underlying mantle. The contour map shows merely the large-scale crustal features, hence the regions with locally thick crust are not visible in this map. The crust which is thicker than 50 km is only to few regions, which includes the Tibetan Plateau located in western China, the Andes in western South America. The crust is generally 30 km measured for thickness in the ocean-continent margin and this gradually increases towards the continental interior towards 40 to 45 km. The continents have an average thickness measuring 39.7 km. The ocean basins have 6 to 7 km thick crust (excluding 4 to 5 km of water). ![]() The method of contouring cannot be totally relied on because two investigators can produce different types of maps whenever interpolation between two data takes place.Ĭontour Mapping According to the Crustal ThicknessĪ contour map of global having the crustal thickness represents the bimodal division of the earth's crustal thickness. While Contour maps represent changes in the elevation with the help of contour lines.Įach of the contour lines being marked on a map joins the points having an equal height. A topographic map is an accurate map that displays natural terrain and also man-made objects like buildings, roads, or bridges. In the contour map meaning, it can be said that contour mapping is a type of topography mapping, but to distinctly study the concept we will find there is an acute difference between the two, so we cannot use each other as synonyms. The lines are carved based on the equal values of that property which is available as data points. We will vividly discuss Contour Mapping in our subsequent sections.įirst and foremost, we will answer ‘what is a contour map?’Ī contour map is a type of map where the shape of the land surface is shown by the contour lines, the relative spacing done between these lines indicates the relative slope of the particular surface.Ĭontour map meaning is quite clear to us, if we further deduce this definition it means – this is the delineation of any property in the map which is formed by constructing lines. For example, a topographic map, showing valleys and hills, its steepness or gentleness of the slopes is represented by the contour lines. These contour lines often illustrate a contour map, which is the main topic of discussion in this specific content. ![]() These lines join points having equal elevated heights, above a predetermined level, normally the sea level. In cartography, a contour line is normally called a ‘contour’. Here the function has a constant value, here the curve joins the points of an equal value. Contour lines are plane sections of the dimensional graph. The lines are the function of two variables, a curve. A contour line can also be called an isoline, isopleth, or isarithm. ![]()
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