page_title: Octant projection
section_title: Octant projection layouts
hierarchical_section_title: Octant projection / Octant projection layouts
caption_attribution_description: English: Mappamundi (World Map)
context_page_description: The octant projection or octants projection, is a type of projection proposed the first time, in 1508, by Leonardo da Vinci in his Codex Atlanticus. Leonardo's authorship would be demonstrated by Christopher Tyler, who stated "For those projections dated later than 1508, his drawings should be effectively considered the original precursors..". In fact, there is a sketch of it on a page in the Codex Atlanticus manuscripts, made from the very hand of Leonardo, being Leonardo's sketch, the first known description of the octant projection.
  The same page of the Codex contains sketches of eight other projections of the globe, being studied by Leonardo, ranging from the Ptolemy's conical planisphere projection to the one proposed by Rosselli,
caption: Leonardo da Vinci's octant projection in eight octants with Reuleaux triangle's shape
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