Essentially copy/pasted from my code and changed to 360 for your tile size... don't ask... I spent an entire evening drawing tiles and solving equations... should have written some comments instead of thinking I'd never forget how I got there.

Vector3 screen2World(int x, int y)
{
	return Vector3(scroll.x + x/zoom, scroll.y + y/zoom, 0);
}

Vec2 world2Tile(float x, float y)
{
	return Vec2( (int)(x + 2*y) / 360, (int)(2*y - x) / 360 );
}

//The top left corner of the bounding box of the diamond shaped tile (ie. where you want to draw the tiles sprite)
//By reversing this you get the formula above
Vector2 tile2World(int x, int y)
{
	 return Vector2((x - y) * 180, (x + y) * 90);
}

Essentially copy/pasted from my code and changed to 360 for your tile size... don't ask... I spent an entire evening drawing tiles and solving equations... should have written some comments instead of thinking I'd never forget how I got there.

Vec2 world2Tile(float x, float y)
{
    return Vec2( (int)(x + 2*y) / 360, (int)(2*y - x) / 360 );
}

Vector3 screen2World(int x, int y)
{
    return Vector3(scroll.x + x/zoom, scroll.y + y/zoom, 0);
}