There is some controversy over the origins of the Mercator. German polymath Erhard Etzlaub engraved miniature "compass maps" (about 10×8 cm) of Europe and parts of Africa that spanned latitudes 0°–67° to allow adjustment of his portable pocket-size sundials. The projection found on these maps, dating to 1511, was stated by John Snyder in 1987 to be the same projection as Mercator's. However, given the geometry of a sundial, these maps may well have been based o… http://www.geography.hunter.cuny.edu/~jochen/GTECH361/lectures/lecture04/concepts/Map%20coordinate%20systems/Projection%20parameters.htm
Universal Transverse Mercator (UTM) Coordinate System
WebFeb 19, 2024 · UTM: a widely used coordinate system. In summary, the Universal Transverse Mercator (UTM) system is a widely used coordinate system that provides an accurate and consistent way to locate positions on the earth’s surface. UTM is based on a grid system of squares and uses a series of cylindrical projections to cover different … WebOct 15, 2024 · The Mercator projection maps the sphere to a rectangle (of infinite extent in the -direction) by the equations . where a, and are as in the previous example. Since the … gifts for someone training for a marathon
Scale (map) - GIS Wiki The GIS Encyclopedia
WebApr 25, 2024 · A cylindrical projection is any projection in which the meridians are mapped to parallel spaced vertical lines and latitudes are mapped to horizontal lines. The projections stretch from east to west … WebMay 18, 2024 · A cylindrical map is one of the ways of displaying the Earth on a flat surface. These map projections feature straight coordinate lines, with meridians crossed at a right angle by the horizontal lines. … WebThe UTM projection adopts a secant projection whereby the cylindrical projection contacts the earth at two standard lines (shown as dashed lines in the above figure). As such, the areal scale at the two standard lines is one whereas at the projection’s central meridian (69°W) scale decreases by a small amount (less than 2%). gifts for someone starting their own business