■ ProjectionBase 클래스를 사용해 커스텀 맵 투영을 구현하는 방법을 보여준다.
▶ HammerAitoffProjection.cs
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using System; using DevExpress.XtraMap; namespace TestProject { /// <summary> /// HAMMER-AITOFF 투영 /// </summary> public class HammerAitoffProjection : ProjectionBase { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 최소 위도 /// </summary> private const double MINIMUM_LATITUDE = -90.0; /// <summary> /// 최대 위도 /// </summary> private const double MAXIMUM_LATITUDE = 90.0; /// <summary> /// 최소 경도 /// </summary> private const double MINIMUM_LONGITUDE = -180.0; /// <summary> /// 최대 경도 /// </summary> private const double MAXIMUM_LONGITUDE = 180.0; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 오프셋 X - OffsetX /// <summary> /// 오프셋 X /// </summary> [Obsolete] public override double OffsetX { get { return 0.5; } } #endregion #region 오프셋 Y - OffsetY /// <summary> /// 오프셋 Y /// </summary> [Obsolete] public override double OffsetY { get { return 0.5; } } #endregion #region 스케일 X - ScaleX /// <summary> /// 스케일 X /// </summary> [Obsolete] public override double ScaleX { get { return 0.5; } } #endregion #region 스케일 Y - ScaleY /// <summary> /// 스케일 Y /// </summary> [Obsolete] public override double ScaleY { get { return -0.25; } } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Private #region 도 구하기 - GetDegree(value) /// <summary> /// 도 구하기 /// </summary> /// <param name="value">값</param> /// <returns>도</returns> private static double GetDegree(double value) { return value * 180.0 / Math.PI; } #endregion #region 라디안 구하기 - GetRadian(value) /// <summary> /// 라디안 구하기 /// </summary> /// <param name="value">값</param> /// <returns>라디안</returns> private static double GetRadian(double value) { return value * Math.PI / 180.0; } #endregion ////////////////////////////////////////////////////////////////////////////////////////// Instance //////////////////////////////////////////////////////////////////////////////// Public #region 지도 단위 구하기 - GeoPointToMapUnit(geoPoint) /// <summary> /// 지도 단위 구하기 /// </summary> /// <param name="geoPoint">지리 포인트</param> /// <returns>지도 단위</returns> public override MapUnit GeoPointToMapUnit(GeoPoint geoPoint) { double longitude = GetRadian(Math.Min(MAXIMUM_LONGITUDE, Math.Max(MINIMUM_LONGITUDE, geoPoint.Longitude))); double latitude = GetRadian(Math.Min(MAXIMUM_LATITUDE , Math.Max(MINIMUM_LATITUDE , geoPoint.Latitude ))); double z = Math.Sqrt(1 + Math.Cos(latitude) * Math.Cos(longitude / 2)); double x = Math.Cos(latitude) * Math.Sin(longitude / 2) / z; double y = Math.Sin(latitude) / z; return new MapUnit(x * ScaleX + OffsetX, y * ScaleY + OffsetY); } #endregion #region 지리 포인트 구하기 - MapUnitToGeoPoint(mapUnit) /// <summary> /// 지리 포인트 구하기 /// </summary> /// <param name="mapUnit">지도 단위</param> /// <returns>지리 포인트</returns> public override GeoPoint MapUnitToGeoPoint(MapUnit mapUnit) { double x = (mapUnit.X - OffsetX) / ScaleX; double y = Math.Min(1, Math.Max(-1, (mapUnit.Y - OffsetY) / ScaleY)); if(IsValidPoint(x, y)) { double z = Math.Sqrt(1 - 0.5 * Math.Pow(x, 2) - 0.5 * Math.Pow(y, 2)); double c = Math.Sqrt(2) * z * x / (2 * Math.Pow(z, 2) - 1); double longitude = 2 * Math.Atan(c); double latitude = Math.Asin(Math.Min(Math.Max(Math.Sqrt(2) * z * y, -1), 1)); double latitudeDegree = latitude * 180.0 / Math.PI; double longitudeDegree = longitude * 180.0 / Math.PI; return new GeoPoint ( Math.Min(MAXIMUM_LATITUDE , Math.Max(MINIMUM_LATITUDE , GetDegree(latitude ))), Math.Min(MAXIMUM_LONGITUDE, Math.Max(MINIMUM_LONGITUDE, GetDegree(longitude))) ); } else { int signX = (x < 0) ? -1 : 1; int signY = (y < 0) ? -1 : 1; return new GeoPoint(MAXIMUM_LATITUDE * signY, MAXIMUM_LONGITUDE * signX); } } #endregion #region 킬로미터 크기 구하기 - GeoToKilometersSize(anchorPoint, mapSize) /// <summary> /// 킬로미터 크기 구하기 /// </summary> /// <param name="anchorPoint">앵커 포인트</param> /// <param name="mapSize">맵 크기</param> /// <returns>킬로미터 크기</returns> public override MapSize GeoToKilometersSize(GeoPoint anchorPoint, MapSize mapSize) { return new MapSize ( mapSize.Width * LonToKilometersRatio * Math.Cos(GetRadian(anchorPoint.Latitude)), mapSize.Height * LatToKilometersRatio ); } #endregion #region 지리 크기 구하기 - KilometersToGeoSize(anchorPoint, mapSize) /// <summary> /// 지리 크기 구하기 /// </summary> /// <param name="anchorPoint">앵커 포인트</param> /// <param name="mapSize">맵 크기</param> /// <returns>지리 크기</returns> public override MapSize KilometersToGeoSize(GeoPoint anchorPoint, MapSize mapSize) { return new MapSize ( mapSize.Width / LonToKilometersRatio / Math.Cos(GetRadian(anchorPoint.Latitude)), mapSize.Height / LatToKilometersRatio ); } #endregion //////////////////////////////////////////////////////////////////////////////// Private #region 포인트 검증 여부 구하기 - IsValidPoint(x, y) /// <summary> /// 포인트 검증 여부 구하기 /// </summary> /// <param name="x">X</param> /// <param name="y">Y</param> /// <returns>포인트 검증 여부</returns> private bool IsValidPoint(double x, double y) { if(Math.Pow(x, 2) + Math.Pow(y, 2) > 1) { return false; } else { return true; } } #endregion } } |
▶ MainForm.cs
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using System; using System.Reflection; using DevExpress.XtraEditors; using DevExpress.XtraMap; namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : XtraForm { //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); GeoMapCoordinateSystem geoMapCoordinateSystem = this.mapControl.CoordinateSystem as GeoMapCoordinateSystem; geoMapCoordinateSystem.Projection = new HammerAitoffProjection(); Uri baseURI = new Uri(Assembly.GetEntryAssembly().Location); this.shapefileDataAdapter.FileUri = new Uri(baseURI, "Data/Countries.shp"); } #endregion } } |
