encode static method
Encodes the given List<Position> to a polyline, a String.
Implementation
static String encode(List<Position> coordinates, {int? precision}) {
if (coordinates.isEmpty) {
return '';
}
var factor = math.pow(10, precision ?? 5),
output = _encode(coordinates[0].lat, 0, factor) +
_encode(coordinates[0].lng, 0, factor);
for (var i = 1; i < coordinates.length; i++) {
var a = coordinates[i], b = coordinates[i - 1];
output += _encode(a.lat, b.lat, factor);
output += _encode(a.lng, b.lng, factor);
}
return output;
}