Quadrilateralized spherical cube

Development of the quadrilateralized spherical cube projection on an Earth model [1]

In mapmaking, a quadrilateralized spherical cube, or quad sphere for short, is an equal-area polyhedral map projection and discrete global grid scheme for data collected on a spherical surface (either that of the Earth or the celestial sphere). It was first proposed in 1975 by Chan and O'Neill for the Naval Environmental Prediction Research Facility.[2] This scheme is also often called the COBE sky cube,[3] because it was designed to hold data from the Cosmic Background Explorer (COBE) project.[4]

  1. ^ "Quadrilateralized Spherical Cube — PROJ 9.2.1 documentation". proj.org. Retrieved 2023-06-10.
  2. ^ Chan, F.K.; O'Neill, E. M. (1975). Feasibility Study of a Quadrilateralized Spherical Cube Earth Data Base (CSC - Computer Sciences Corporation, EPRF Technical Report 2-75) (Technical report). Monterey, California: Environmental Prediction Research Facility.
  3. ^ "COBE Quadrilateralized Spherical Cube".
  4. ^ Max Tegmark. "What is the best way to pixelize a sphere?".