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<no name> by Anonymous

using System;
using ProjNet;
using ProjNet.CoordinateSystems;
using ProjNet.CoordinateSystems.Transformations;

public class GeoCoordinateConverter
{
    private readonly CoordinateSystemFactory _coordinateSystemFactory;
    private readonly CoordinateTransformationFactory _coordinateTransformationFactory;

    public GeoCoordinateConverter()
    {
        _coordinateSystemFactory = new CoordinateSystemFactory();
        _coordinateTransformationFactory = new CoordinateTransformationFactory();
    }

    public double[] ConvertLatLonToPlaneRectangular(double lat, double lon)
    {
        // WGS84座標系
        var wgs84 = _coordinateSystemFactory.CreateFromWkt(
            "GEOGCS[\"GCS_WGS_1984\",DATUM[\"D_WGS_1984\"," +
            "SPHEROID[\"WGS_1984\",6378137,298.257223563]],PRIMEM[\"Greenwich\",0]," +
            "UNIT[\"Degree\",0.0174532925199433]]");

        // 平面直角座標系7番（JGD2000 / Japan Plane Rectangular CS VII）の定義
        var prcs7 = _coordinateSystemFactory.CreateFromWkt(
            "PROJCS[\"JGD2000 / Japan Plane Rectangular CS VII\"," +
            "GEOGCS[\"JGD2000\",DATUM[\"Japanese_Geodetic_Datum_2000\"," +
            "SPHEROID[\"GRS 1980\",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]]," +
            "PRIMEM[\"Greenwich\",0],UNIT[\"degree\",0.0174532925199433]]," +
            "PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"latitude_of_origin\",22]," +
            "PARAMETER[\"central_meridian\",136],PARAMETER[\"scale_factor\",0.9999]," +
            "PARAMETER[\"false_easting\",0],PARAMETER[\"false_northing\",0]," +
            "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]]]");

        // 座標変換を行うオブジェクトの作成
        var transform = _coordinateTransformationFactory.CreateFromCoordinateSystems(
            wgs84, prcs7);

        // 緯度・経度から平面直角座標に変換
        var converted = transform.MathTransform.Transform(new[] { lon, lat });

        return converted;
    }
}

public class Program
{
    public static void Main(string[] args)
    {
        GeoCoordinateConverter converter = new GeoCoordinateConverter();
        double lat = 35.696543562047744;
        double lon = 139.78738890030908;
        
        double[] converted = converter.ConvertLatLonToPlaneRectangular(lat, lon);
        Console.WriteLine("Converted coordinates: X={0}, Y={1}", converted[0], converted[1]);
    }
}

​x
 
using System;
using ProjNet;
using ProjNet.CoordinateSystems;
using ProjNet.CoordinateSystems.Transformations;
​
public class GeoCoordinateConverter
{
    private readonly CoordinateSystemFactory _coordinateSystemFactory;
    private readonly CoordinateTransformationFactory _coordinateTransformationFactory;
​
    public GeoCoordinateConverter()
    {
        _coordinateSystemFactory = new CoordinateSystemFactory();
        _coordinateTransformationFactory = new CoordinateTransformationFactory();
    }
​
    public double[] ConvertLatLonToPlaneRectangular(double lat, double lon)
    {
        // WGS84座標系
        var wgs84 = _coordinateSystemFactory.CreateFromWkt(
            "GEOGCS[\"GCS_WGS_1984\",DATUM[\"D_WGS_1984\"," +
            "SPHEROID[\"WGS_1984\",6378137,298.257223563]],PRIMEM[\"Greenwich\",0]," +
            "UNIT[\"Degree\",0.0174532925199433]]");
​
        // 平面直角座標系7番（JGD2000 / Japan Plane Rectangular CS VII）の定義
        var prcs7 = _coordinateSystemFactory.CreateFromWkt(
            "PROJCS[\"JGD2000 / Japan Plane Rectangular CS VII\"," +
            "GEOGCS[\"JGD2000\",DATUM[\"Japanese_Geodetic_Datum_2000\"," +
            "SPHEROID[\"GRS 1980\",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]]," +
            "PRIMEM[\"Greenwich\",0],UNIT[\"degree\",0.0174532925199433]]," +
            "PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"latitude_of_origin\",22]," +
            "PARAMETER[\"central_meridian\",136],PARAMETER[\"scale_factor\",0.9999]," +
            "PARAMETER[\"false_easting\",0],PARAMETER[\"false_northing\",0]," +
            "UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]]]");
​
        // 座標変換を行うオブジェクトの作成
        var transform = _coordinateTransformationFactory.CreateFromCoordinateSystems(
            wgs84, prcs7);
​
        // 緯度・経度から平面直角座標に変換
        var converted = transform.MathTransform.Transform(new[] { lon, lat });
​
        return converted;
    }
}
​
public class Program
{
    public static void Main(string[] args)
    {
        GeoCoordinateConverter converter = new GeoCoordinateConverter();
        double lat = 35.696543562047744;
        double lon = 139.78738890030908;
        
        double[] converted = converter.ConvertLatLonToPlaneRectangular(lat, lon);
        Console.WriteLine("Converted coordinates: X={0}, Y={1}", converted[0], converted[1]);
    }
}
​

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Last Run:	4:34:38 pm
Compile:	0.178s
Execute:	0.16s
Memory:	14.46Mb
CPU:	0.338s

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