POLYCONICS

Polyconic projection is a map projection on which the meridians of normal aspect are mapped as curves symmetrical about the straight central meridian, and parallels as nonconcentric circular arcs with centres on the central meridian.
There are different polyconic projections. One of them is the American polyconic projection.

American polyconic projection of the world

Types of Polyconic Map Projections	Links	Videos
American Polyconic Projection	https://en.wikipedia.org/wiki/Polyconic_projection http://egsc.usgs.gov/isb//pubs/MapProjections/projections.html#poly http://map-projections.net/single-view/american-polyconic-global http://www.yourdictionary.com/polyconic-projection https://www.mapthematics.com/ProjectionsList.php?Projection=113 https://www.jasondavies.com/maps/polyconic/ http://www.csiss.org/map-projections/Polyconic/American_Polyconic.pdf
Rectangular Polyconic Projection	http://www.progonos.com/furuti/MapProj/Normal/ProjCon/ProjPolycon/projPolycon.html#RPolycon https://www.mapthematics.com/ProjectionsList.php?Projection=129#rectangular polyconic http://www.csiss.org/map-projections/Polyconic/Rectangular_Polyconic.pdf http://www.quadibloc.com/maps/mpo0502.htm
Modified Polyconic Projection	http://www.georeference.org/doc/modified_polyconic.htm