将经纬度点转换为平面坐标。
private IPoint GCStoPRJ(double x, double y)
{
IPoint cPoint = new ESRI.ArcGIS.Geometry.Point();
cPoint.PutCoords(x, y);
ISpatialReferenceFactory pSpatialReferenceFactory = new SpatialReferenceEnvironment();
cPoint.SpatialReference = pSpatialReferenceFactory.CreateGeographicCoordinateSystem(4326);
cPoint.Project(pSpatialReferenceFactory.CreateProjectedCoordinateSystem((int)esriSRProjCS4Type.esriSRProjCS_Beijing1954_3_Degree_GK_CM_117E));
return cPoint;
}
将米为单位的坐标投射为经纬度
private IPoint PRJtoGCS(double x, double y)
{
IPoint pPoint = new ESRI.ArcGIS.Geometry.Point();
pPoint.PutCoords(x, y);
ISpatialReferenceFactory pSRF = new SpatialReferenceEnvironment();
pPoint.SpatialReference = pSRF.CreateProjectedCoordinateSystem((int)esriSRProjCS4Type.esriSRProjCS_Beijing1954_3_Degree_GK_CM_117E);
//pPoint.Project(pSRF.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_GEM10C));
pPoint.Project(pSRF.CreateGeographicCoordinateSystem(4326));
return pPoint;
}
通常需要将经纬度坐标与投影坐标相互转换，下面是一些源码，在ArcEngine中实现。 投影转经纬度 private IPoint PRJtoGCS(double x, double y) { IPoint pPoint = new PointClass(); pPoint.PutCoords(x, y); ISpatialReferenceFactory pSRF = new SpatialReferenceEnvironmentClass(); pPoint.SpatialReference = pSRF.CreateProjectedCoordinateSystem(2428); pPoint.Project(pSRF.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_Beijing1954)); return pPoint; } 其中，pPoint.SpatialReference = pSRF.CreateProjectedCoordinateSystem( 2428 ); 这行代码是设置pPoint 的空间参考，也就是要转化的点的投影坐标。如果不知道投影坐标的话，转化会报异常。2428 为该投影的enum 值 pPoint.Project(pSRF.CreateGeographicCoordinateSystem(( int)esriSRGeoCSType.esriSRGeoCS_Beijing1954)); 将该点的投影坐标转化为经纬度。 经纬度到投影 private IPoint GCStoPRJ(IPoint pPoint, int GCSType,int PRJType) { ISpatialReferenceFactory pSRF = new SpatialReferenceEnvironmentClass(); pPoint.SpatialReference = pSRF.CreateGeographicCoordinateSystem(GCSType); pPoint.Project(pSRF.CreateProjectedCoordinateSystem(PRJType)); return pPoint; } //同样的一个函数 private IPoint GCStoPRJ(IPoint pPoint) { ISpatialReferenceFactory pSpatialReferenceFactory = new SpatialReferenceEnvironment(); pPoint.SpatialReference = pSpatialReferenceFactory.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_Krasovsky1940); IProjectedCoordinateSystem pProjectCoodinateSys = pSpatialReferenceFactory.CreateProjectedCoordinateSystem((int)esriSRProjCS4Type.esriSRProjCS_Xian1980_GK_Zone_17); ISpatialReference pSpatialReference = (ISpatialReference)pProjectCoodinateSys; pSpatialReference.SetDomain(17352988.066800, 18230892.557100, 2326007.173500, 3237311.062300); pPoint.Project(pSpatialReference); } //球面坐标 //esriSRGeoCS_WGS1984 4326 WGS 1984. //esriSRGeoCS_Beijing1954 4214 Beijing 1954. //平面坐标 ////北京54六度带 //esriSRProjCS_Beijing1954GK_13 21413 Beijing 1954 GK Zone 13. //esriSRProjCS_Beijing1954GK_14 21414 Beijing 1954 GK Zone 14. //esriSRProjCS_Beijing1954GK_15 21415 Beijing 1954 GK Zone 15. //esriSRProjCS_Beijing1954GK_16 21416 Beijing 1954 GK Zone 16. //esriSRProjCS_Beijing1954GK_17 21417 Beijing 1954 GK Zone 17. //esriSRProjCS_Beijing1954GK_18 21418 Beijing 1954 GK Zone 18. //esriSRProjCS_Beijing1954GK_19 21419 Beijing 1954 GK Zone 19. //esriSRProjCS_Beijing1954GK_20 21420 Beijing 1954 GK Zone 20. //esriSRProjCS_Beijing1954GK_21 21421 Beijing 1954 GK Zone 21. //esriSRProjCS_Beijing1954GK_22 21422 Beijing 1954 GK Zone 22. //esriSRProjCS_Beijing1954GK_23 21423 Beijing 1954 GK Zone 23. //esriSRProjCS_Beijing1954GK_13N 21473 Beijing 1954 GK Zone 13N. //esriSRProjCS_Beijing1954GK_14N 21474 Beijing 1954 GK Zone 14N. //esriSRProjCS_Beijing1954GK_15N 21475 Beijing 1954 GK Zone 15N. //esriSRProjCS_Beijing1954GK_16N 21476 Beijing 1954 GK Zone 16N. //esriSRProjCS_Beijing1954GK_17N 21477 Beijing 1954 GK Zone 17N. //esriSRProjCS_Beijing1954GK_18N 21478 Beijing 1954 GK Zone 18N. //esriSRProjCS_Beijing1954GK_19N 21479 Beijing 1954 GK Zone 19N. //esriSRProjCS_Beijing1954GK_20N 21480 Beijing 1954 GK Zone 20N. //esriSRProjCS_Beijing1954GK_21N 21481 Beijing 1954 GK Zone 21N. //esriSRProjCS_Beijing1954GK_22N 21482 Beijing 1954 GK Zone 22N. //esriSRProjCS_Beijing1954GK_23N 21483 Beijing 1954 GK Zone 23N. ////北京54三度带 //esriSRProjCS_Beijing1954_3_Degree_GK_CM_102E 2431 Beijing 1954 3 Degree GK CM 102E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_105E 2432 Beijing 1954 3 Degree GK CM 105E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_108E 2433 Beijing 1954 3 Degree GK CM 108E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_111E 2434 Beijing 1954 3 Degree GK CM 111E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_114E 2435 Beijing 1954 3 Degree GK CM 114E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_117E 2436 Beijing 1954 3 Degree GK CM 117E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_120E 2437 Beijing 1954 3 Degree GK CM 120E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_123E 2438 Beijing 1954 3 Degree GK CM 123E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_126E 2439 Beijing 1954 3 Degree GK CM 126E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_129E 2440 Beijing 1954 3 Degree GK CM 129E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_132E 2441 Beijing 1954 3 Degree GK CM 132E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_135E 2442 Beijing 1954 3 Degree GK CM 135E. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_25 2401 Beijing 1954 3 Degree GK Zone 25. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_26 2402 Beijing 1954 3 Degree GK Zone 26. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_27 2403 Beijing 1954 3 Degree GK Zone 27. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_28 2404 Beijing 1954 3 Degree GK Zone 28. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_29 2405 Beijing 1954 3 Degree GK Zone 29. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_30 2406 Beijing 1954 3 Degree GK Zone 30. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_31 2407 Beijing 1954 3 Degree GK Zone 31. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_32 2408 Beijing 1954 3 Degree GK Zone 32. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_33 2409 Beijing 1954 3 Degree GK Zone 33. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_34 2410 Beijing 1954 3 Degree GK Zone 34. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_35 2411 Beijing 1954 3 Degree GK Zone 35. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_36 2412 Beijing 1954 3 Degree GK Zone 36. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_37 2413 Beijing 1954 3 Degree GK Zone 37. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_38 2414 Beijing 1954 3 Degree GK Zone 38. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_39 2415 Beijing 1954 3 Degree GK Zone 39. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_40 2416 Beijing 1954 3 Degree GK Zone 40. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_41 2417 Beijing 1954 3 Degree GK Zone 41. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_42 2418 Beijing 1954 3 Degree GK Zone 42. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_43 2419 Beijing 1954 3 Degree GK Zone 43. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_44 2420 Beijing 1954 3 Degree GK Zone 44. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_45 2421 Beijing 1954 3 Degree GK Zone 45. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_75E 2422 Beijing 1954 3 Degree GK CM 75E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_78E 2423 Beijing 1954 3 Degree GK CM 78E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_81E 2424 Beijing 1954 3 Degree GK CM 81E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_84E 2425 Beijing 1954 3 Degree GK CM 84E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_87E 2426 Beijing 1954 3 Degree GK CM 87E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_90E 2427 Beijing 1954 3 Degree GK CM 90E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_93E 2428 Beijing 1954 3 Degree GK CM 93E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_96E 2429 Beijing 1954 3 Degree GK CM 96E. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_99E 2430 Beijing 1954 3 Degree GK CM 99E.
根据两点生成一条线
private IPolyline CreatePolyLineByTwoPoint(IPoint p1, IPoint p2)
{
INewLineFeedback m_LineFeed = new NewLineFeedback();
m_LineFeed.Start(p1);
m_LineFeed.AddPoint(p2);
IPolyline m_PolyLine = m_LineFeed.Stop();
return m_PolyLine;
}
画点
public void newPoint(double lngg, double latt)
{
FormMain main = (FormMain)this.Owner;
double XPoint = lngg;
double YPoint = latt;
IActiveView pActiveView = main.axMapControl1.ActiveView;
IPoint pPoint = new ESRI.ArcGIS.Geometry.Point();
pPoint.PutCoords(XPoint, YPoint);
IMarkerElement pMarkerElement;
pMarkerElement = new MarkerElementClass();
ISimpleMarkerSymbol pMarkerSymbol = new SimpleMarkerSymbol();
pMarkerSymbol.Size = 6;
IElement pElement;
pElement = pMarkerElement as IElement;
pElement.Geometry = pPoint;
pMarkerElement.Symbol = pMarkerSymbol;
main.endIElement.Add(pElement);//添加到终点起点list
//建立文字符号对象，并设置相应的属性
ITextElement pTextEle;
IElement pEles;
pTextEle = new TextElementClass();
pTextEle.Text = "[" + lngg + "," + latt + "]";
//symbol
ITextSymbol pTextSymbol = new TextSymbol();
pTextSymbol.Color = GetRGBColor(255, 0, 0);
pTextSymbol.Size = 10;
pTextEle.Symbol = pTextSymbol;
pEles = pTextEle as IElement;
pEles.Geometry = pPoint;
main.endTextIElement.Add(pEles);//添加到终点起点list
IGraphicsContainer pGraphicsContainer = main.axMapControl1.ActiveView as IGraphicsContainer;
pGraphicsContainer.AddElement((IElement)pEles, 0);
pGraphicsContainer.AddElement((IElement)pMarkerElement, 0);
pActiveView.Refresh();
}