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Aug 18, 2022 · Topographic Contours. Many maps of land areas have series of curved lines, called contours, that represent the topography of the area. Such a map is called a topographic map. A contour is a horizontal curve that’s the locus of all points on the map with the same elevation (Figure 3-35).
- Map Parts, Orientation, & Scale
- Using Contour Lines to Interpret Topographic Maps
- Drawing Contour Lines and Topographic Profiles
A map is a plan view (viewed from above, also known as map view) representation of an area on Earth’s surface. Topographic maps are maps that illustrate the topography (vertical shape, such as hills) of the mapped region. Geological mapsare maps that illustrate the rock types, rock ages and other geological features of the mapped area. Every map ha...
Contour linesallow us to add a vertical dimension to a plan view map. Contour lines represent elevations above sea level at specific intervals within a map area. Since each individual contour line connects points of equal elevation, if you were to follow a contour line across a map area in the real world you would be walking at the same elevation w...
Rules for Drawing Contour Lines
Constructing a topographic map is simple if you remember the following rules as you draw in contour lines on a map: 1. Contour lines represent lines connecting points of equal elevation above sea level. You can think of contour lines like fences separating lower elevations from higher elevations. 2. Contour intervals must be obeyed, therefore the contour line elevations can only be multiples of the contour interval. E.g., If the contour interval is 20 m, you can have contour lines at 20 m, 40...
Topographic Profiles
When working with topographic maps, sometimes it is useful to examine the landscape in profile. A topographic profileis a vertical cross-section or side image through a map that allows us to see how the topography varies along a line through the map. In Figure 6.11, the upper part shows a topographic map of a hill that contains two separate hill tops, and the bottom picture shows a topographic profile representing the profile along the line A-B on the map. Notice that the topographic profile...
- Karla Panchuk
- 2020
A topographic map is a detailed and accurate illustration of man-made and natural features on the ground such as roads, railways, power transmission lines, contours, elevations, rivers, lakes and geographical names. The topographic map is a two-dimensional representation of the Earth’s three-dimensional landscape.
Jan 26, 2024 · Here are just a few details a topographic map may bring to light: Elevation changes, which are shown through contour lines. Streams, rivers, lakes, and various other important bodies of water. Mountains, forests, tree cover, and other large natural features. Trails, roads, railroads, and other major transportation infrastructure.
A topographic map is a type of map that adds a vertical dimension to an otherwise two-dimensional map defined by the north, south, east, and west compass directions. This third dimension on a topographic map is represented by contour lines , which represent a constant elevations above either sea level (either average sea level (a.s.l.) or mean sea level (m.s.l.)).
Jul 30, 2024 · Topographic maps have a scale bar depicting the relationship and distance between the map and actual ground distances. You can use the scale bar to precisely calculate hiking or transit distances or measure distances between points and features. Furthermore, Topographic maps include a grid of latitude and longitude lines.
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Oct 7, 2014 · These lines are called contour lines and they make a topographic map their unique subset of planimetric map. There are two types of contour lines, intermediate and index. Intermediate contour lines are the thin brown lines which show the map's elevation. Index contour lines are a thicker brown line located every 5th intermediate. These lines ...
