conversion of longitude/latitude into cartesian coordinates using js function

[shashikala]

hey all,
I am working on a project in advanced java using netbeans in which i need to calculate the latitude and longitude of an airport into cartesian coordinates. i have no idea to that, well math scares me. any idea how to do the conversion? can that conversion code be converted into a javascript function?
further i need an advise too. how should i calculate coordinates of two airplanes when they are flying so that i can restrict them from colliding each other?
any help will be really appreciated. thanks in advance :)

[Dormilich]

I am working on a project in advanced java using netbeans in which i need to calculate the latitude and longitude of an airport into cartesian coordinates.

note: Java =/= JavaScript.

second, for the conversion you need to know a little bit more:
- where is the point-of-origin of the cartesian coordinate system?
- you also need the distance from the point-of-origin in the polar coordinate system (lattitude and longitude alone do not define a point, the define a line)

ideas for the conversion you will find in Wikipedia.

how should i calculate coordinates of two airplanes when they are flying so that i can restrict them from colliding each other?

vectorial Maths.

[shashikala]

Thanks dormilich.
The refrence is the earth with respect to which i am doing all calculations. The altitude is measured from sea level

[Dormilich]

The refrence is the earth

Earth is a roughly spherical body of ~10¹² km³, that’s just a little bit too big for a point-of-origin.

The altitude is measured from sea level

as long as you know the altitude (for any object (including airports) you want to do the conversion), there’s no problem.