If we have the coordinates of two points on earth, how can we calculate the distance between these two points?

Answer 1

The same way you calculate the distance between any two points. The lattitude and longitude are just X and Y coordinates. the line between them is the hypotenuse of a right triangle so you use the pythagorean theorem

Answer 2

Any two points on earth (even opposite sides of the earth) lie on a great circle (circumference) of the earth. If you can determine how many degrees the points are apart, their distance will be in proportion to the total distance and degrees (360 degrees) of a complete great circle. For example opposite points will be 180 degrees apart and 180/360 = 1/2 or 0.5 and their distance apart will be 1/2 the circumference of the world (neglecting that the earth is not a perfect sphere).

Answer 3

Dear friend non of these methods given by them are correct. The latitude and longitude are divided in degrees so the distance in degrees will vary in distance according to the distance from the equator. The equator is the biggest circle for 360 degree. The places near north and south poles will be lessor in distance for the same angle. It needs some complicated formula. Not so easy. You can roughly assume that each degree is equal to 111 k/M distance,

Answer 4

the super-circle distance is the shortest distance between any 2 factors on the exterior of a sphere measured alongside a course on the exterior of the sector (as antagonistic to moving into the time of the sector's indoors). because of the fact around geometry is relatively different from trouble-free Euclidean geometry, the equations for distance handle a different variety. the gap between 2 factors in Euclidean area is the size of a directly line from one element to the different. on the sector, besides the undeniable fact that, there are no longer any directly traces. In non-Euclidean geometry, directly traces are replaced with Geodesics. Geodesics on the sector are the super circles (circles on the sector whose centers are coincident with the middle of the sector). between any 2 factors on a sphere that are no longer directly opposite one yet another, there's a different super circle. the two factors separate the super circle into 2 arcs. The length of the shorter arc is the super-circle distance between the factors. between 2 factors that are directly opposite one yet another, referred to as antipodal factors, there are infinitely many super circles, yet all super circle arcs between antipodal factors have a similar length, i.e. 0.5 the circumference of the circle, or ?r, the place r is the radius of the sector. because of the fact the Earth is approximately around (see Earth radius), the equations for super-circle distance are substantial for looking the shortest distance between factors on the exterior of the Earth, and so have substantial purposes in navigation.

Answer 5

Since you can't travel through the center of the earth but have to stay on the surface, here's a great circle didtance calculator that should be what you want.

http://home.att.net/~srschmitt/script_greatcircle.html