地理坐标和投影坐标转换程序，基于ArcGIS Engine

地质BOSS

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

1. private IPoint PRJtoGCS(double x, double y)  
   
2.         {  
   
3.           IPoint pPoint = new PointClass();  
   
4.           pPoint.PutCoords(x, y);  
   
5.           ISpatialReferenceFactory pSRF = new SpatialReferenceEnvironmentClass();  
   
6.           pPoint.SpatialReference = pSRF.CreateProjectedCoordinateSystem(2428);  
   
7.           pPoint.Project(pSRF.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_Beijing1954));  
   
8.           return pPoint;  
   
9.         }

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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

1. private IPoint GCStoPRJ(IPoint pPoint, int GCSType,int PRJType)
   
2.          {   
   
3.              ISpatialReferenceFactory pSRF = new SpatialReferenceEnvironmentClass();   
   
4.              pPoint.SpatialReference = pSRF.CreateGeographicCoordinateSystem(GCSType);   
   
5.              pPoint.Project(pSRF.CreateProjectedCoordinateSystem(PRJType));   
   
6. 
   
7.              return pPoint;  
   
8.         }
   
9. 
   
10. //同样的一个函数

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1. private IPoint GCStoPRJ(IPoint pPoint)
   
2. {
   
3.             ISpatialReferenceFactory pSpatialReferenceFactory = new SpatialReferenceEnvironment();
   
4.             pPoint.SpatialReference = pSpatialReferenceFactory.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_Krasovsky1940);
   
5.             IProjectedCoordinateSystem pProjectCoodinateSys = pSpatialReferenceFactory.CreateProjectedCoordinateSystem((int)esriSRProjCS4Type.esriSRProjCS_Xian1980_GK_Zone_17);
   
6.             ISpatialReference pSpatialReference = (ISpatialReference)pProjectCoodinateSys;
   
7.             pSpatialReference.SetDomain(17352988.066800, 18230892.557100, 2326007.173500, 3237311.062300);
   
8.             pPoint.Project(pSpatialReference);
   
9. }
   
10. 
    
11. //球面坐标
    
12. //esriSRGeoCS_WGS1984 4326 WGS 1984.
    
13. //esriSRGeoCS_Beijing1954 4214 Beijing 1954.
    
14. 
    
15. //平面坐标
    
16. ////北京54六度带
    
17. //esriSRProjCS_Beijing1954GK_13 21413 Beijing 1954 GK Zone 13.
    
18. //esriSRProjCS_Beijing1954GK_14 21414 Beijing 1954 GK Zone 14.
    
19. //esriSRProjCS_Beijing1954GK_15 21415 Beijing 1954 GK Zone 15.
    
20. //esriSRProjCS_Beijing1954GK_16 21416 Beijing 1954 GK Zone 16.
    
21. //esriSRProjCS_Beijing1954GK_17 21417 Beijing 1954 GK Zone 17.
    
22. //esriSRProjCS_Beijing1954GK_18 21418 Beijing 1954 GK Zone 18.
    
23. //esriSRProjCS_Beijing1954GK_19 21419 Beijing 1954 GK Zone 19.
    
24. //esriSRProjCS_Beijing1954GK_20 21420 Beijing 1954 GK Zone 20.
    
25. //esriSRProjCS_Beijing1954GK_21 21421 Beijing 1954 GK Zone 21.
    
26. //esriSRProjCS_Beijing1954GK_22 21422 Beijing 1954 GK Zone 22.
    
27. //esriSRProjCS_Beijing1954GK_23 21423 Beijing 1954 GK Zone 23.
    
28. //esriSRProjCS_Beijing1954GK_13N 21473 Beijing 1954 GK Zone 13N.
    
29. //esriSRProjCS_Beijing1954GK_14N 21474 Beijing 1954 GK Zone 14N.
    
30. //esriSRProjCS_Beijing1954GK_15N 21475 Beijing 1954 GK Zone 15N.
    
31. //esriSRProjCS_Beijing1954GK_16N 21476 Beijing 1954 GK Zone 16N.
    
32. //esriSRProjCS_Beijing1954GK_17N 21477 Beijing 1954 GK Zone 17N.
    
33. //esriSRProjCS_Beijing1954GK_18N 21478 Beijing 1954 GK Zone 18N.
    
34. //esriSRProjCS_Beijing1954GK_19N 21479 Beijing 1954 GK Zone 19N.
    
35. //esriSRProjCS_Beijing1954GK_20N 21480 Beijing 1954 GK Zone 20N.
    
36. //esriSRProjCS_Beijing1954GK_21N 21481 Beijing 1954 GK Zone 21N.
    
37. //esriSRProjCS_Beijing1954GK_22N 21482 Beijing 1954 GK Zone 22N.
    
38. //esriSRProjCS_Beijing1954GK_23N 21483 Beijing 1954 GK Zone 23N.
    
39. ////北京54三度带
    
40. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_102E 2431 Beijing 1954 3 Degree GK CM 102E.
    
41. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_105E 2432 Beijing 1954 3 Degree GK CM 105E.
    
42. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_108E 2433 Beijing 1954 3 Degree GK CM 108E.
    
43. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_111E 2434 Beijing 1954 3 Degree GK CM 111E.
    
44. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_114E 2435 Beijing 1954 3 Degree GK CM 114E.
    
45. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_117E 2436 Beijing 1954 3 Degree GK CM 117E.
    
46. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_120E 2437 Beijing 1954 3 Degree GK CM 120E.
    
47. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_123E 2438 Beijing 1954 3 Degree GK CM 123E.
    
48. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_126E 2439 Beijing 1954 3 Degree GK CM 126E.
    
49. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_129E 2440 Beijing 1954 3 Degree GK CM 129E.
    
50. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_132E 2441 Beijing 1954 3 Degree GK CM 132E.
    
51. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_135E 2442 Beijing 1954 3 Degree GK CM 135E.
    
52. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_25 2401 Beijing 1954 3 Degree GK Zone 25.
    
53. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_26 2402 Beijing 1954 3 Degree GK Zone 26.
    
54. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_27 2403 Beijing 1954 3 Degree GK Zone 27.
    
55. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_28 2404 Beijing 1954 3 Degree GK Zone 28.
    
56. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_29 2405 Beijing 1954 3 Degree GK Zone 29.
    
57. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_30 2406 Beijing 1954 3 Degree GK Zone 30.
    
58. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_31 2407 Beijing 1954 3 Degree GK Zone 31.
    
59. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_32 2408 Beijing 1954 3 Degree GK Zone 32.
    
60. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_33 2409 Beijing 1954 3 Degree GK Zone 33.
    
61. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_34 2410 Beijing 1954 3 Degree GK Zone 34.
    
62. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_35 2411 Beijing 1954 3 Degree GK Zone 35.
    
63. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_36 2412 Beijing 1954 3 Degree GK Zone 36.
    
64. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_37 2413 Beijing 1954 3 Degree GK Zone 37.
    
65. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_38 2414 Beijing 1954 3 Degree GK Zone 38.
    
66. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_39 2415 Beijing 1954 3 Degree GK Zone 39.
    
67. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_40 2416 Beijing 1954 3 Degree GK Zone 40.
    
68. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_41 2417 Beijing 1954 3 Degree GK Zone 41.
    
69. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_42 2418 Beijing 1954 3 Degree GK Zone 42.
    
70. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_43 2419 Beijing 1954 3 Degree GK Zone 43.
    
71. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_44 2420 Beijing 1954 3 Degree GK Zone 44.
    
72. //esriSRProjCS_Beijing1954_3_Degree_GK_Zone_45 2421 Beijing 1954 3 Degree GK Zone 45.
    
73. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_75E 2422 Beijing 1954 3 Degree GK CM 75E.
    
74. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_78E 2423 Beijing 1954 3 Degree GK CM 78E.
    
75. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_81E 2424 Beijing 1954 3 Degree GK CM 81E.
    
76. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_84E 2425 Beijing 1954 3 Degree GK CM 84E.
    
77. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_87E 2426 Beijing 1954 3 Degree GK CM 87E.
    
78. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_90E 2427 Beijing 1954 3 Degree GK CM 90E.
    
79. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_93E 2428 Beijing 1954 3 Degree GK CM 93E.
    
80. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_96E 2429 Beijing 1954 3 Degree GK CM 96E.
    
81. //esriSRProjCS_Beijing1954_3_Degree_GK_CM_99E 2430 Beijing 1954 3 Degree GK CM 99E.

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