/// <summary>
/// 创建Dataset
/// </summary>
/// <param name="wsTarget"></param>
/// <param name="pSpatialRef"></param>
/// <returns></returns>
protected virtual IFeatureDataset CreateFeatureDataset(IWorkspace wsTarget, ISpatialReference pSpatialRef)
{
if (wsTarget == null)
{
return(null);
}
try
{
if (pSpatialRef == null)
{
pSpatialRef = new UnknownCoordinateSystemClass();
ISpatialReferenceTolerance pSpatialTolerance = pSpatialRef as ISpatialReferenceTolerance;
double dXYTolerance = pSpatialTolerance.XYTolerance;
double dZTolerance = pSpatialTolerance.ZTolerance;
ISpatialReferenceResolution pSpatialRefResolution = pSpatialRef as ISpatialReferenceResolution;
pSpatialRefResolution.set_XYResolution(true, dXYTolerance * 0.1);
pSpatialRefResolution.set_ZResolution(true, dZTolerance * 0.1);
pSpatialRefResolution.MResolution = pSpatialTolerance.MTolerance * 0.1;
}
return(((IFeatureWorkspace)wsTarget).CreateFeatureDataset(COMMONCONST.Dataset_Name, pSpatialRef));
}
catch (Exception ex)
{
SendMessage(enumMessageType.Exception, string.Format("创建Dataset时出错，信息：{0}", ex.Message));
return(null);
}
}
/// <summary>
/// 根据某一图层的范围，创建mdb文件中的featuredataset及其空间范围
/// </summary>
/// <param name="motherWs">要创建featuredataset的工作空间</param>
/// <param name="pGeoDataset">featuredataset所要依据的空间参考和空间范围</param>
/// 这个函数要改！！
public static void CreateDatasetInWs(IWorkspace motherWs, IGeoDataset pGeoDataset, string datasetName)
{
try
{
ISpatialReference pSpatialRef = null;
IFeatureDataset pFtDs = null;
if (pGeoDataset != null)
{
pSpatialRef = pGeoDataset.SpatialReference;
IControlPrecision2 controlPrecision2 = pSpatialRef as IControlPrecision2;
if (!controlPrecision2.IsHighPrecision)
{
controlPrecision2.IsHighPrecision = true;
}
IEnvelope pEnv = pGeoDataset.Extent;
pEnv.Expand(1.5, 1.5, true);
pSpatialRef.SetDomain(pEnv.XMin, pEnv.XMax, pEnv.YMin, pEnv.YMax);
ISpatialReferenceTolerance pSpatialTolerance = (ISpatialReferenceTolerance)pSpatialRef;
double dXYTolerance = pSpatialTolerance.XYTolerance;
double dZTolerance = pSpatialTolerance.ZTolerance;
ISpatialReferenceResolution pSpatialRefResolution = (ISpatialReferenceResolution)pSpatialRef;
pSpatialRefResolution.set_XYResolution(true, dXYTolerance * 0.1);
pSpatialRefResolution.set_ZResolution(true, dZTolerance * 0.1);
pSpatialRefResolution.MResolution = pSpatialTolerance.MTolerance * 0.1;
pFtDs = ((IFeatureWorkspace)motherWs).CreateFeatureDataset(datasetName, pSpatialRef);
}
else
{
pSpatialRef = new UnknownCoordinateSystemClass();
ISpatialReferenceTolerance pSpatialTolerance = (ISpatialReferenceTolerance)pSpatialRef;
double dXYTolerance = pSpatialTolerance.XYTolerance;
double dZTolerance = pSpatialTolerance.ZTolerance;
ISpatialReferenceResolution pSpatialRefResolution = (ISpatialReferenceResolution)pSpatialRef;
pSpatialRefResolution.set_XYResolution(true, dXYTolerance * 0.1);
pSpatialRefResolution.set_ZResolution(true, dZTolerance * 0.1);
pSpatialRefResolution.MResolution = pSpatialTolerance.MTolerance * 0.1;
pFtDs = ((IFeatureWorkspace)motherWs).CreateFeatureDataset(datasetName, pSpatialRef);
}
}
catch (Exception exp)
{
Hy.Common.Utility.Log.OperationalLogManager.AppendMessage(exp.ToString());
}
}
/// <summary>
/// 创建空间参考
/// </summary>
/// <param name="headNode">VCT头节点</param>
private ISpatialReference CreateProjection(HeadNode headNode)
{
try
{
string sPrjInfo = "";
//根据投影参数中的长半轴值，来判断是什么坐标系统（北京54，西安80，WGS－84，其他地方坐标系）
//北京54
double dMajorAxis = headNode.MajorMax.Y;
//读取参考椭球的名称 （名称，长半轴，扁率的倒数）
string sProjection = headNode.Spheroid.Split(',')[0];
dMajorAxis = Math.Abs(dMajorAxis - 6378245);
//if (fabs( m_dSemiMajorAxis - 6378245) < 0.0001)
if (dMajorAxis < 0.0001)
{
sPrjInfo = string.Format("PROJCS[\"{0}\",GEOGCS[\"GCS_Beijing_1954\",DATUM[\"D_Beijing_1954\""
+ ",SPHEROID[\"{1}\",6378140.0,298.257]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],"
+ "PROJECTION[\"Gauss_Kruger\"],PARAMETER[\"False_Easting\",{2}],PARAMETER[\"False_Northing\",0.0],"
+ "PARAMETER[\"Central_Meridian\",{3}],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",0.0],"
+ "UNIT[\"Meter\",1.0]]", sProjection, "Gauss-Krueger", headNode.Excursion, headNode.Parametetor.OriginLongtitude);
}
//西安80
else
{
// sPrjInfo = string.Format("PROJCS["%s\",GEOGCS[\"GCS_Xian_1980\",DATUM[\"D_Xian_1980\",SPHEROID[\"%s\",6378140.0,298.257]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Gauss_Kruger\"],PARAMETER[\"False_Easting\",%s],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",%f],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",0.0],UNIT[\"Meter\",1.0]]", m_strProjection, m_strSpheroid, sPianYi, m_lMeridian);
sPrjInfo = string.Format("PROJCS[\"{0}\",GEOGCS[\"GCS_Xian_1980\",DATUM[\"D_Xian_1980\","
+ "SPHEROID[\"{1}\",6378140.0,298.257]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],"
+ "PROJECTION[\"Gauss_Kruger\"],PARAMETER[\"False_Easting\",{2}],PARAMETER[\"False_Northing\",0.0],"
+ "PARAMETER[\"Central_Meridian\",{3}],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",0.0],"
+ "UNIT[\"Meter\",1.0]]", sProjection, "Gauss-Krueger", headNode.Parametetor.EastOffset, headNode.Parametetor.OriginLongtitude);
}
//将坐标信息写入到Prj文件
string sPrjFilename = Application.StartupPath + "tempPrj.prj";
FileStream fs = File.Create(sPrjFilename);
StreamWriter sw = new StreamWriter(fs);
sw.Write(sPrjInfo);
sw.Close();
fs.Close();
//根据Prj文件生成空间参考
ISpatialReferenceFactory ipSpatialFactory = new SpatialReferenceEnvironmentClass();
ISpatialReference pSpatialReference = ipSpatialFactory.CreateESRISpatialReferenceFromPRJFile(sPrjFilename);
pSpatialReference.SetDomain(headNode.MajorMin.X,headNode.MajorMax.X,headNode.MajorMin.Y,headNode.MajorMax.Y);//
//设置精度,防止cut失败
//设置六位小数精度。以保证导出时也是六位
ISpatialReferenceTolerance ipSrTolerance = pSpatialReference as ISpatialReferenceTolerance;
ipSrTolerance.XYTolerance = 0.000001;
ipSrTolerance.MTolerance = 0.001;
ipSrTolerance.ZTolerance = 0.001;
ISpatialReferenceResolution ipSrResolution = pSpatialReference as ISpatialReferenceResolution;
ipSrResolution.MResolution = 0.001;
ipSrResolution.set_XYResolution(true, 0.000001);
ipSrResolution.set_ZResolution(true, 0.001);
//删除生成的Prj文件
File.Delete(sPrjFilename);
//ISpatialReference pSpatialReference;
//ISpatialReferenceFactory pSpatialreferenceFactory;
//pSpatialreferenceFactory = new SpatialReferenceEnvironmentClass();
//IGeographicCoordinateSystem pGeographicCoordinateSystem;
//pGeographicCoordinateSystem = pSpatialreferenceFactory.CreateGeographicCoordinateSystem((int)esriSRGeoCS3Type.esriSRGeoCS_Xian1980);
//pSpatialReference = pGeographicCoordinateSystem as ISpatialReference;
//pSpatialReference.SetFalseOriginAndUnits(-180, -90, 1000000);//
return pSpatialReference;
}
catch (Exception ex)
{
LogAPI.WriteLog("创建空间参考失败，系统默认创建空的空间参考！\r\n");
LogAPI.WriteErrorLog(ex);
ISpatialReference pSpatialReference = new UnknownCoordinateSystemClass();
pSpatialReference.SetDomain(headNode.MajorMin.X, headNode.MajorMax.X, headNode.MajorMin.Y, headNode.MajorMax.Y);//
return pSpatialReference;
}
}