private void CustomGT()
{
// Initialize a new spatial reference environment.
// SpatialReferenceEnvironment is a singleton object and needs to use the Activator class.
Type factoryType = Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
System.Object obj = Activator.CreateInstance(factoryType);
ISpatialReferenceFactory2 pSRF = obj as ISpatialReferenceFactory2;
// Initialize and create the input and output coordinate systems.
IProjectedCoordinateSystem2 pPCSin = new ESRI.ArcGIS.Geometry.ProjectedCoordinateSystemClass();
IProjectedCoordinateSystem2 pPCSout = new ESRI.ArcGIS.Geometry.ProjectedCoordinateSystemClass();
pPCSin = (IProjectedCoordinateSystem2)pSRF.CreateProjectedCoordinateSystem((int)esriSRProjCSType.esriSRProjCS_Abidjan1987UTM_30N);
pPCSout = (IProjectedCoordinateSystem2)pSRF.CreateProjectedCoordinateSystem((int)esriSRProjCSType.esriSRProjCS_WGS1984UTM_30N);
// Retrieve the geographic coordinate systems from the two projected
// coordinate systems.
IGeographicCoordinateSystem2 pGCSto = (IGeographicCoordinateSystem2)pPCSout.GeographicCoordinateSystem;
IGeographicCoordinateSystem2 pGCSfrom = (IGeographicCoordinateSystem2)pPCSin.GeographicCoordinateSystem;
// Initialize and create an appropriate geographic transformation.
ICoordinateFrameTransformation pCFT = new CoordinateFrameTransformationClass();
pCFT.PutParameters(1.234, -2.345, 658.3, 4.3829, -2.48591, 2.18943, 2.48585);
pCFT.PutSpatialReferences(pGCSfrom, pGCSto);
pCFT.Name = "Custom GeoTran";
// The SpatialReferenceEnvironment has a GeoTransformationOperationSet that you
// can use to maintain a list of active geographic transformations.
// Once you add a geographic transformation to the operation set, many operations
// can access the transformations.
// Add the transformation to the operation set.
IGeoTransformationOperationSet pGTSet = pSRF.GeoTransformationDefaults;
// Always add a geographic transformation in both directions.
pGTSet.Set(esriTransformDirection.esriTransformForward, pCFT);
pGTSet.Set(esriTransformDirection.esriTransformReverse, pCFT);
}
//默认的参考
private ISpatialReference spatialReference()
{
ISpatialReferenceFactory pSpatialReferenceEnvironemnt = new SpatialReferenceEnvironment();
ISpatialReferenceFactory2 pSpatialReferenceFactory2 = pSpatialReferenceEnvironemnt as ISpatialReferenceFactory2;
ISpatialReference pSpatialReference = pSpatialReferenceFactory2.CreateSpatialReference(4326);
//esriSRProjCS4Type
//esriSRGeoCS3Type
//esriSRDatum3Type
return(pSpatialReference);
}
//功能描述: 从PRJ文件获取投影坐标系统
//参数列表: prj (string)
public static ISpatialReference LoadPRJ(string sPrj)
{
ISpatialReferenceFactory2 pSpatRefFact = default(ISpatialReferenceFactory2);
//pSpatRefFact = new SpatialReferenceEnvironment();
pSpatRefFact = new SpatialReferenceEnvironmentClass();
ISpatialReference pSpatRef = default(ISpatialReference);
pSpatRef = pSpatRefFact.CreateESRISpatialReferenceFromPRJFile(sPrj);
return(pSpatRef);
}
public FeatureHelper()
{
Type factoryType = Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
System.Object obj = Activator.CreateInstance(factoryType);
ISpatialReferenceFactory2 srf = obj as ISpatialReferenceFactory2;
m_PCSout = new ESRI.ArcGIS.Geometry.ProjectedCoordinateSystemClass();
m_PCSout = (IProjectedCoordinateSystem2)srf.CreateProjectedCoordinateSystem((int)esriSRProjCS3Type.esriSRProjCS_WGS1984WebMercatorMajorAuxSphere);
// 102100 is equivalent to esriSRProjCS_WGS1984WebMercatorMajorAuxSphere
m_sr = new com.esri.ags.SpatialReference(102100);
}
/// <summary>
/// sets spatial reference for the map using SRS value in wmc
/// </summary>
/// <param name="ipMxDoc"></param>
/// <param name="sSRS"></param>
private void SetSpatialReference(IMxDocument ipMxDoc, string sSRS)
{
try
{
string sSpatRefID; // Spatial Reference ID
// get spatial reference factory code from SRS (for example EPSG:NNNN - NNNN is the factory code)
int iPos;
sSRS = sSRS.Trim();
iPos = sSRS.IndexOf(":");
if (iPos > 0)
{
sSpatRefID = sSRS.Substring(iPos + 1);
}
else
{
sSpatRefID = sSRS;
}
int wkid = int.Parse(sSpatRefID);
if (wkid != 0)
{
ISpatialReferenceFactory2 pSpatRefFactory = (ISpatialReferenceFactory2) new SpatialReferenceEnvironment();
ISpatialReference pSpatRef = pSpatRefFactory.CreateSpatialReference(wkid);
if (pSpatRef != null)
{
// set spatial reference for the map
ipMxDoc.FocusMap.SpatialReference = pSpatRef;
}
else
{
MessageBox.Show(StringResources.FailedSpatRef);
}
}
}
catch (Exception e)
{
logger.writeLog(e.StackTrace);
}
}
