On Jan 6, 10:49 pm, Markw65 <[email protected]> wrote: > > No. > > "A spherical triangle is a figure formed on the surface of a sphere by > > three great circular arcs intersecting pairwise in three vertices" > > From:http://mathworld.wolfram.com/SphericalTriangle.html > > Thats why I put the "" around "triangle" - because its degenerate.
It's not "degenerate". It's a different shape altogether, called a "lune". > But to be honest, Im not sure your definition is particularly > authoritative - simply because it *does* exclude degenerate triangles. Search for other definitions until you find a site you trust and show us a link. All the definitions I can find refer to three great circles, not more not less. > Doesnt really affect anything either way. Just move the last point to > 179.99999999999, and everyone's happy. Yes, it does. If you move the last point away from the anti-meridian, as you suggest here, then you have a triangle instead of a lune. In any case, this discussion started when you challenged Mike's method for finding the center of gravity, saying --------------- "Suppose the three points are (lat,lng) 0,0; 87,0; 0,180. Your "center of gravity" would be 29,60 - which isnt even on the same great circle. " --------------- But what "same great circle" are you referring to? "same great circle" as what? I don't see any problem with Mike's method. -- Marcelo - http://maps.forum.nu -- > > Mark --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Maps API" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/Google-Maps-API?hl=en -~----------~----~----~----~------~----~------~--~---
