Isopleth on a contour map connects the places having the same value of some measurable quantity of geographical or meteorological phenomena.įor Ex. The population density of an area can be calculated by the quotient of population in the area and surface area of a region. Read More on Surveying Types of Contour Lines in Surveying and their ImportanceĬontour lines are differentiated into many types based upon the function it denotes, they are listed as below:įollowing are the uses and importance of different types of contour lines in surveying: 1. In a single contour line, at any point the elevation is same.If the closed line have increasing elevation as we move away, then it represents a pond or a depression in the ground profile.If the closed lines have higher elevation in the center then it represents the hill or mountain.If the contour lines are at very large distance to each other, this indicates a gentle slope.If the contour lines are very close to each other, this indicates steep slope.All lines close themselves within the map boundaries or outside it.A contour map, also known as an isoline map, typically shows multiple contours such as. The tiles are generated on zoom levels 9-14 but can be. A contour is an imaginary line that connects points of equal value. Provided area is marked with a rectangle. ![]() Zoom in to preview the details of this tileset. The detailed contour lines available for the whole planet are derived from the global elevation data composed from several Open Data sources. No two lines meet on intersect each other in any case. Download Contour lines vector tiles of South Africa.In other words, contour lines are lines that represent the altitude or depth of the earth’s surface or seafloor on a topographic or bathymetric. Characteristics of Contour Lines in Surveyingįollowing are the characteristics of contour lines in surveying for reading contour maps: Contour lines, also known as level curves or simply contours, are imaginary lines that connect points on a map that have the same elevation above a reference level, typically sea level. In cartography, contour lines are an imaginary line of a terrain that joins the point of equal elevation above a given level, such as mean sea level or benchmark.
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