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  2. Compass (drawing tool) - Wikipedia

    en.wikipedia.org/wiki/Compass_(drawing_tool)

    A bow compass capable of drawing the smallest possible circles. A compass, also commonly known as a pair of compasses, is a technical drawing instrument that can be used for inscribing circles or arcs. As dividers, it can also be used as a tool to mark out distances, in particular, on maps. Compasses can be used for mathematics, drafting ...

  3. Map symbol - Wikipedia

    en.wikipedia.org/wiki/Map_symbol

    A map symbol or cartographic symbol is a graphical device used to visually represent a real-world feature on a map, working in the same fashion as other forms of symbols. Map symbols may include point markers, lines, regions, continuous fields, or text; these can be designed visually in their shape, size, color, pattern, and other graphic ...

  4. Military Grid Reference System - Wikipedia

    en.wikipedia.org/wiki/Military_Grid_Reference_System

    An MGRS grid reference is a point reference system. When the term 'grid square' is used, it can refer to a square with a side length of 10 km (6 mi), 1 km, 100 m (328 ft), 10 m or 1 m, depending on the precision of the coordinates provided. (In some cases, squares adjacent to a Grid Zone Junction (GZJ) are clipped, so polygon is a better ...

  5. Highway location marker - Wikipedia

    en.wikipedia.org/wiki/Highway_location_marker

    Mile marker 23 on US 36 in Delaware County, Ohio. It marks the location which is 23 miles from the Union County line. A highway location marker is the modern-day equivalent of a milestone. Unlike traditional milestones, however, which (as their name suggests) were originally carved from stone and sited at one-mile intervals, modern highway ...

  6. Survey marker - Wikipedia

    en.wikipedia.org/wiki/Survey_marker

    Survey markers, also called survey marks, survey monuments, or geodetic marks, are objects placed to mark key survey points on the Earth's surface. They are used in geodetic and land surveying. A benchmark is a type of survey marker that indicates elevation (vertical position). Horizontal position markers used for triangulation are also known ...

  7. Silk Road - Wikipedia

    en.wikipedia.org/wiki/Silk_Road

    Ssu1 chʻou1 chih1 lu4. The Silk Road[ a ] was a network of Eurasian trade routes active from the second century BCE until the mid-15th century. [ 1 ] Spanning over 6,400 km (4,000 mi), it played a central role in facilitating economic, cultural, political, and religious interactions between the Eastern and Western worlds. [ 2 ][ 3 ][ 4 ...

  8. Compass - Wikipedia

    en.wikipedia.org/wiki/Compass

    Other features found on modern orienteering compasses are map and romer scales for measuring distances and plotting positions on maps, luminous markings on the face or bezels, various sighting mechanisms (mirror, prism, etc.) for taking bearings of distant objects with greater precision, gimbal-mounted, "global" needles for use in differing ...

  9. Map - Wikipedia

    en.wikipedia.org/wiki/Map

    Physical map of Earth. Political map of Earth. A map is a symbolic depiction emphasizing relationships between elements of some space, such as objects, regions, or themes. Many maps are static, fixed to paper or some other durable medium, while others are dynamic or interactive. Although most commonly used to depict geography, maps may ...