Hello, I’m looking for a long time for a way to convert a GPS location (lat, lon) to a unity proportional location, I found a script by MichaelTaylor3D that I honestly don’t know if it works, but I can’t even tell when I try.
Try using your script in another Script I made, but I don’t know if I’m doing things right or what I should change.
This is the script I found on the internet:
//Copyright 2013 MichaelTaylor3D
//www.michaeltaylor3d.com
using UnityEngine;
public sealed class GPSEncoder {
/////////////////////////////////////////////////
//////-------------Public API--------------//////
/////////////////////////////////////////////////
/// <summary>
/// Convert UCS (X,Y,Z) coordinates to GPS (Lat, Lon) coordinates
/// </summary>
/// <returns>
/// Returns Vector2 containing Latitude and Longitude
/// </returns>
/// <param name='position'>
/// (X,Y,Z) Position Parameter
/// </param>
public static Vector2 USCToGPS(Vector3 position)
{
return GetInstance().ConvertUCStoGPS(position);
}
/// <summary>
/// Convert GPS (Lat, Lon) coordinates to UCS (X,Y,Z) coordinates
/// </summary>
/// <returns>
/// Returns a Vector3 containing (X, Y, Z)
/// </returns>
/// <param name='gps'>
/// (Lat, Lon) as Vector2
/// </param>
public static Vector3 GPSToUCS(Vector2 gps)
{
return GetInstance().ConvertGPStoUCS(gps);
}
/// <summary>
/// Convert GPS (Lat, Lon) coordinates to UCS (X,Y,Z) coordinates
/// </summary>
/// <returns>
/// Returns a Vector3 containing (X, Y, Z)
/// </returns>
public static Vector3 GPSToUCS(float latitude, float longitude)
{
return GetInstance().ConvertGPStoUCS(new Vector2(latitude,longitude));
}
/// <summary>
/// Change the relative GPS offset (Lat, Lon), Default (0,0),
/// used to bring a local area to (0,0,0) in UCS coordinate system
/// </summary>
/// <param name='localOrigin'>
/// Referance point.
/// </param>
public static void SetLocalOrigin(Vector2 localOrigin)
{
GetInstance()._localOrigin = localOrigin;
}
/////////////////////////////////////////////////
//////---------Instance Members------------//////
/////////////////////////////////////////////////
#region Singleton
private static GPSEncoder _singleton;
private GPSEncoder()
{
}
private static GPSEncoder GetInstance()
{
if(_singleton == null)
{
_singleton = new GPSEncoder();
}
return _singleton;
}
#endregion
#region Instance Variables
private Vector2 _localOrigin = Vector2.zero;
private float _LatOrigin { get{ return _localOrigin.x; }}
private float _LonOrigin { get{ return _localOrigin.y; }}
private float metersPerLat;
private float metersPerLon;
#endregion
#region Instance Functions
private void FindMetersPerLat(float lat) // Compute lengths of degrees
{
// Set up "Constants"
float m1 = 111132.92f; // latitude calculation term 1
float m2 = -559.82f; // latitude calculation term 2
float m3 = 1.175f; // latitude calculation term 3
float m4 = -0.0023f; // latitude calculation term 4
float p1 = 111412.84f; // longitude calculation term 1
float p2 = -93.5f; // longitude calculation term 2
float p3 = 0.118f; // longitude calculation term 3
lat = lat * Mathf.Deg2Rad;
// Calculate the length of a degree of latitude and longitude in meters
metersPerLat = m1 + (m2 * Mathf.Cos(2 * (float)lat)) + (m3 * Mathf.Cos(4 * (float)lat)) + (m4 * Mathf.Cos(6 * (float)lat));
metersPerLon = (p1 * Mathf.Cos((float)lat)) + (p2 * Mathf.Cos(3 * (float)lat)) + (p3 * Mathf.Cos(5 * (float)lat));
}
private Vector3 ConvertGPStoUCS(Vector2 gps)
{
FindMetersPerLat(_LatOrigin);
float zPosition = metersPerLat * (gps.x - _LatOrigin); //Calc current lat
float xPosition = metersPerLon * (gps.y - _LonOrigin); //Calc current lat
return new Vector3((float)xPosition, 0, (float)zPosition);
}
private Vector2 ConvertUCStoGPS(Vector3 position)
{
FindMetersPerLat(_LatOrigin);
Vector2 geoLocation = new Vector2(0,0);
geoLocation.x = (_LatOrigin + (position.z)/metersPerLat); //Calc current lat
geoLocation.y = (_LonOrigin + (position.x)/metersPerLon); //Calc current lon
return geoLocation;
}
#endregion
}
and this would be the other Script I made, which uses this previous one:
using System.Collections;
using UnityEngine;
public class GPS: MonoBehaviour
{
public static GPS Instance { set; get; }
public float latitude;
public float longitude;
private void Start()
{
Instance = this;
Vector3 localOrigin = GPSEncoder.GPSToUCS(12.31565f, -12.53465f);
Vector2 vector2 = new Vector2(localOrigin.x, localOrigin.z);
GPSEncoder.SetLocalOrigin(vector2);
StartCoroutine(StartLocationService());
}
private void Update()
{
Vector3 coord = GPSEncoder.GPSToUCS(latitude, longitude);
transform.position = coord;
}
private IEnumerator StartLocationService()
{
if(!Input.location.isEnabledByUser)
{
Debug.Log("Usuario no activo el GPS");
yield break;
}
Input.location.Start();
int maxWait = 20;
while(Input.location.status == LocationServiceStatus.Initializing && maxWait > 0)
{
yield return new WaitForSeconds(1);
maxWait--;
}
if(maxWait <= 0)
{
Debug.Log("Tiempo agotado");
yield break;
}
if (Input.location.status == LocationServiceStatus.Failed)
{
Debug.Log("Imposible determinar la ubicación del dispositivo");
yield break;
}
latitude = Input.location.lastData.latitude;
longitude = Input.location.lastData.longitude;
yield break;
}
}
To make it clear what I want:
I want to navigate a real life 2D map, so I want X coordinate to be the 0, 0, 0 point in unity, so that when I’m standing there, it’s on the map and I can see it on the mobile device. The problem is that with what I did, the camera to which I apply the script goes to I don’t know where (to a place all black, I can’t even see anything when I go there in the scene, it seems like an unknown dimension), without However, in its position X and Z it is not very far from the point 0, 0, I don’t understand what happens there.
I hope you can help me and if I have an error, you can explain me what it is 
PS: I’m sorry if the explanation is not very well understood.