Polyconic

Pol`y`con´ic


a.1.Pertaining to, or based upon, many cones.
Polyconic projection
(Map Making) a projection of the earth's surface, or any portion thereof, by which each narrow zone is projected upon a conical surface that touches the sphere along this zone, the conical surface being then unrolled. This projection differs from conic projection in that latter assumes but one cone for the whole map. Polyconic projection is that in use in the United States coast and geodetic survey.
References in periodicals archive ?
With a set of newfangled tools and theories, this 35-year-old Sicilian biologist and self-made pruning expert is working on his first commercial project to introduce the central Italian technique known as the "polyconic vase" into Sicily's often remote and overgrown olive groves.
Measurements of zinc status are often unreliable indicators of clinical status; thus a therapeutic trial of physiological amounts of zinc in the presence of the zinc-binding ligand polyconic acid is one approach to determine its deficit status and clinical efficacy.
Geological Survey's EROS Alaska Field Office produced a geo-referenced digital map and associated attribute data for the distribution of Alaskan permafrost at the scale of 1:2 500000 based on the source map (polyconic projection) of Ferrians (1965).
The London conference specified that the IMW would use a 1:1 million scale on a simple polyconic projection.
Each coverage was projected using Polyconic Projection and Spheroid Everest geoid system for area estimation of different classes for a particular map.