Say, in Google Earth or Virtual Earth, we define 3 pair of longitude and latitude (or x and y).
We need 3 pair because:
- The first two pair is to define the start and end, therefore, form a direct line.
- Another pair is just a point that is located somewhere else. In most of my cases (99.99%), it is located somewhere between the line (sometimes fall under the path of the line, which means I don't need any further mathematical calculation).
My question is:
How do I find the longitude and latitude intersection in that line, that is a result of the projection from the point?
Thank you in advance for the answer.
Jul 14th 2007, 10:35 AM
This is one way of doing it, but it wont exactly work on Google earth though :D
The curve above that purple line can be calculated using radians i think. :) And then you'll have the distance.