public static enumSpatialRelType GetSpatialRelType(ISpatialReference spatialReference)
{
enumSpatialRelType spatialRelType = enumSpatialRelType.Unknown;
if (spatialReference == null)
{
return(spatialRelType);
}
//地理坐标系统
IGeographicCoordinateSystem geographicCoordinateSystem = spatialReference as IGeographicCoordinateSystem;
if (geographicCoordinateSystem != null)
{
spatialRelType = enumSpatialRelType.GCS;
return(spatialRelType);
}
//投影坐标系统
IProjectedCoordinateSystem projectedCoordinateSystem = spatialReference as IProjectedCoordinateSystem;
if (projectedCoordinateSystem != null)
{
spatialRelType = enumSpatialRelType.PCS;
return(spatialRelType);
}
return(spatialRelType);
}
public static string ConvertGeometryToJson(IGeometry geometry,
bool isGeneralize = false)
{
string geomJsonStr = null;
try
{
ITopologicalOperator topoGeom = geometry as ITopologicalOperator;
topoGeom.Simplify();
//IPolygon polygon = topoGeom as IPolygon;
//if (polygon != null)
//{
// polygon.Generalize(1);
//}
//if (geometry.SpatialReference == null || geometry.SpatialReference.Name == "Unknown")
//{
// geometry.SpatialReference = SpatialRefOpt.GetProjectedCoordinate(esriSRProjCS4Type.esriSRProjCS_Xian1980_3_Degree_GK_CM_120E);
//}
if (isGeneralize)
{
ISpatialReference spatialReference = geometry.SpatialReference;
enumSpatialRelType spatialRelType = GetSpatialRelType(spatialReference);
double offset = 0.000001;
if (spatialRelType == enumSpatialRelType.GCS)
{
offset = 0.00000001;
}
IPolycurve polycurve = geometry as IPolycurve;
polycurve.Generalize(offset);
}
IJSONWriter jsonWriter = new JSONWriterClass();
jsonWriter.WriteToString();
JSONConverterGeometryClass jsonCon = new JSONConverterGeometryClass();
jsonCon.WriteGeometry(jsonWriter, null, geometry, false);
geomJsonStr = Encoding.UTF8.GetString(jsonWriter.GetStringBuffer());
}
catch (Exception ex)
{
System.Diagnostics.Trace.WriteLine("\nConvertGeometryToJson::error::" + ex.Source + ".\n" + ex.ToString());
}
return(geomJsonStr);
}
