小编Nik*_*kar的帖子

GeoTools 和 GIS 新手，我正在尝试使用 GeoTools 库计算孟买和德班之间的距离。我正在接近小距离的准确结果，但当我进行较大距离时，计算结果偏离了 2000 公里，我不完全理解 CRS 系统。下面是我计算孟买和德班之间距离的代码

    Coordinate source = new Coordinate(19.0760, 72.8777);   ///Mumbai Lat Long
    Coordinate destination1 = new Coordinate(-29.883333, 31.049999); //Durban Lat Long

    GeometryFactory geometryFactory = new GeometryFactory();
    Geometry point1 = geometryFactory.createPoint(source);
    Geometry point2 = geometryFactory.createPoint(destination1);

    CoordinateReferenceSystem auto = auto = CRS.decode("AUTO:42001,13.45,52.3");
    MathTransform transform = CRS.findMathTransform(DefaultGeographicCRS.WGS84, auto);

    Geometry g3 = JTS.transform(point1, transform);
    Geometry g4 = JTS.transform(point2, transform);

    double distance = g3.distance(g4);