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  2. History of cartography - Wikipedia

    en.wikipedia.org/wiki/History_of_cartography

    Pei is best known for his work in cartography. Although map making and use of the grid existed in China before him, [41]: 106–107 he was the first to mention a plotted geometrical grid and graduated scale displayed on the surface of maps to gain greater accuracy in the estimated distance between different locations.

  3. Distance decay - Wikipedia

    en.wikipedia.org/wiki/Distance_decay

    Distance decay is a geographical term which describes the effect of distance on cultural or spatial interactions. [1] The distance decay effect states that the interaction between two locales declines as the distance between them increases. Once the distance is outside of the two locales' activity space, their interactions begin to decrease.

  4. History of longitude - Wikipedia

    en.wikipedia.org/wiki/History_of_longitude

    (Absolute here refers to a time that is the same for an observer anywhere on Earth.) Each hour of difference of local time corresponds to a 15 degrees change of longitude (360 degrees divided by 24 hours). A Transit Instrument from 1793. Local noon is defined as the time at which the Sun is at the highest point in the sky.

  5. History of geography - Wikipedia

    en.wikipedia.org/wiki/History_of_geography

    The Yu Ji Tu, or Map of the Tracks of Yu Gong, carved into stone in 1137, [21] located in the Stele Forest of Xi'an. This 3 feet (0.91 m) squared map features a graduated scale of 100 li for each rectangular grid. China's coastline and river systems are clearly defined and precisely pinpointed on the map.

  6. On the Sizes and Distances (Aristarchus) - Wikipedia

    en.wikipedia.org/wiki/On_the_Sizes_and_Distances...

    Aristarchus's 3rd century BCE calculations on the relative sizes of, from left, the Sun, Earth and Moon, from a 10th-century CE Greek copy. On the Sizes and Distances (of the Sun and Moon) (Ancient Greek: Περὶ μεγεθῶν καὶ ἀποστημάτων [ἡλίου καὶ σελήνης], romanized: Perì megethôn kaì apostēmátōn [hēlíou kaì selḗnēs]) is widely accepted ...

  7. Mercator projection - Wikipedia

    en.wikipedia.org/wiki/Mercator_projection

    True distance = rhumb distance ≅ ruler distance × cos φ / RF. (short lines) (short lines) With radius and great circle circumference equal to 6,371 km and 40,030 km respectively an RF of ⁠ 1 / 300M ⁠ , for which R = 2.12 cm and W = 13.34 cm, implies that a ruler measurement of 3 mm. in any direction from a point on the equator ...

  8. Mercator 1569 world map - Wikipedia

    en.wikipedia.org/wiki/Mercator_1569_world_map

    Mercator's 1569 map was a large planisphere, [3] i.e. a projection of the spherical Earth onto the plane. It was printed in eighteen separate sheets from copper plates engraved by Mercator himself. [4]

  9. Early world maps - Wikipedia

    en.wikipedia.org/wiki/Early_world_maps

    At the time, one of the most reliable maps of the two hemispheres was the first large-scale map drawn in Armenian. [54] The world map was created in a Western cartographic style. To engrave the map's copper plates, the Schoonebeek brothers, who were considered the best masters, were employed.