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A graphical or bar scale. A map would also usually give its scale numerically ("1:50,000", for instance, means that one cm on the map represents 50,000cm of real space, which is 500 meters) A bar scale with the nominal scale expressed as "1:600 000", meaning 1 cm on the map corresponds to 600,000 cm=6 km on the ground.
Given two points of interest, finding the midpoint of the line segment they determine can be accomplished by a compass and straightedge construction.The midpoint of a line segment, embedded in a plane, can be located by first constructing a lens using circular arcs of equal (and large enough) radii centered at the two endpoints, then connecting the cusps of the lens (the two points where the ...
The scale of a city map is usually between 1:10,000 and 1:25,000. Densely settled downtown areas will sometimes be partly drawn in a larger scale, on a separate detail map. In addition to linear true to scale maps, there are also maps with variable scale, for example where the scale gradually increases towards the city centre ( aerial ...
The impossibility of flattening the sphere to the plane without distortion means that the map cannot have a constant scale. Rather, on most projections, the best that can be attained is an accurate scale along one or two paths on the projection. Because scale differs everywhere, it can only be measured meaningfully as point scale per location ...
National atlases in Europe are typically printed at a scale of 1:250,000 to 1:500,000; [a] city atlases are 1:20,000 to 1:25,000, [b] doubling for the central area (for example, Geographers' A-Z Map Company's A–Z atlas of London is 1:22,000 for Greater London and 1:11,000 for Central London). [c] [5] A travel atlas may also be referred to as ...
This map of the Falkland Islands incorporates several elements of map layout: a title, a scale bar, a legend, and an inset map. This is a compromise between the fluid and compartmentalized approaches to layout order, with the non-map elements sitting "on top" of the main map. Here, the top-heavy main map is balanced by the non-map elements below.
Finding the geodesic between two points on the Earth, the so-called inverse geodetic problem, was the focus of many mathematicians and geodesists over the course of the 18th and 19th centuries with major contributions by Clairaut, [5] Legendre, [6] Bessel, [7] and Helmert English translation of Astron. Nachr. 4, 241–254 (1825).
The length of the line on the linear scale is equal to the distance represented on the earth multiplied by the map or chart's scale. In most projections, scale varies with latitude, so on small scale maps, covering large areas and a wide range of latitudes, the linear scale must show the scale for the range of latitudes covered by the map. One ...