function coordinate_to_number($a)
{
if (is_string($a)) {
$a = coordinate_take_apart($a);
}
return $a[0] * ($a[3] + $a[2] * 60 + $a[1] * 3600);
}
function data_to_real(&$x, &$y)
{
$x = coordinate_to_number(coordinate_take_apart($x));
$y = coordinate_to_number(coordinate_take_apart($y));
$z = $x;
$x = $y;
$y = $z;
# Switching y/x to x/y
$y = 90 * 3600 - $y;
# displaying from north to south
# Recording min and max for viewbox
$this->min_x = min($this->min_x, $x);
$this->min_y = min($this->min_y, $y);
$this->max_x = max($this->max_x, $x);
$this->max_y = max($this->max_y, $y);
}
