Detect if a co-ordinate falls within a longitude and latitude boundary box

Question

Maths has never been my strong point and I'm struggling with a task.

I need to determine if a set of longitude and latitude co-ordinates fall inside a box, where the max/min longitude and max/min latitude have been given.

Any help would be appreciated.

** EDITED **

I'm using GPS co-ordinates, so the minimum longitude could be larger than the maximum longitude. i.e if the box is over date line.

Answer 1

Given minlat, maxlat, minlong and maxlong (ie the 4 corners of your box) then it's a simple matter of determining whether your lat lies between minlat and maxlat and your long between minlong and maxlong.

If the box straddles 180° either shift all your longitudes by adding (or subtracting) the same offset (take care with signs) or split the box into two along longitude 180° and test both halves separately.

Answer 2

if( latitude>= given.minimumLatitude and lat <= given.maximumLatitude )
{
    if( longitude >= given.minimumLongitude and longitude <= given.maximumLongitude )
    {
       return true;
    }
}

return false;

Answer 3

box = left, right, top, bottom

point = x, y

if (x >= left && x <= right && y >= bottom && y <= top) {
  return true
} else {
  return false
}