also: グノモンとうえい
A map projection where great circles are straight lines; used in navigation and seismology.
In a gnomonic projection, great-circle routes are shown as straight lines.
The distribution of earthquake epicenters was plotted using a gnomonic projection.
Standard spelling for gnomonic projection.
Alternate spelling reflecting the original Greek 'gnomon'.
From English 'gnomonic projection', with the 'g' sometimes dropped in Japanese pronunciation.