A conic projection of a map having distances between meridians equal to … What does POLYCONIC PROJECTION mean? Remarks. 1. a conic projection of a map having distances between meridians equal to those distances on a globe Familiarity information: POLYCONIC PROJECTION used as a noun is very rare. A polyconic projection, used in large-scale map series, treats each band of maps as part of a cone tangent to the globe at the particular latitude. If done correctly, it will pick your custom transformations. The blue line indicates the line (or point) of contact between the reducible surface to which the projection is made and the sphere. This projection was apparently originated about 1820 by Ferdinand Rudolph Hassler. Polyconic can refer either to a class of map projections or to a specific projection known less ambiguously as the American Polyconic. Definition of Polyconic projection. Meaning of POLYCONIC PROJECTION. The polyconic projection is neither conformal nor equivalent; it is a compromise projection that attempts to minimize all distortions while not eliminating any particular type of distortion. Lexic.us. Definition of Polyconic projection with photos and pictures, translations, sample usage, and additional links for more information. 5) You can also create a custom polyconic projected coordinate system and automatically project your data. Note: In ArcGIS Pro 2.5, there are some issues with reading custom coordinate systems from Favorites, so you might have to manually input correct GCS definition when creating it. By definition, this projection has no standard parallels, since every parallel is a standard parallel. polyconstd implements the Polyconic projection directly on a reference ellipsoid, consistent with the industry-standard definition of this projection. Features. See polycon for an alternative implementation based on rotating the rectifying sphere.. For this projection, each parallel has a curvature identical to its curvature on a cone tangent at that latitude. It was an extremely popular projection from the mid 1800s through the mid 1900s; its popularity has waned in the last 50 years. It is also known as the American Polyconic and the Ordinary Polyconic projection. • POLYCONIC PROJECTION (noun) The noun POLYCONIC PROJECTION has 1 sense:. A polyconic projection is a map projection consisting of a composite series of concentric cones each of which before being unrolled has been placed over a sphere so as to be tangent to a different parallel of latitude (as shown below in the generalized chart). The example shown above is the Polyconic projection, where parallels are all non-concentric circular arcs, except for a straight equator, and the centers of these circles lie along a central axis. 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