Definition of gnomonic projection
: an azimuthal projection of a part of a hemisphere showing the earth's grid as projected by radials from a point at the center of the sphere onto a tangent plane so that all straight lines represent arcs of great circles thereby making this projection valuable for navigation when used in conjunction with the Mercator projection
— called also great-circle chart
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“Gnomonic projection.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gnomonic%20projection. Accessed 7 May. 2021.
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