ArcGIS_Geocode_Search_CSharp\App_Code\Utility.cs
// Copyright 2010 ESRI // // All rights reserved under the copyright laws of the United States // and applicable international laws, treaties, and conventions. // // You may freely redistribute and use this sample code, with or // without modification, provided you include the original copyright // notice and use restrictions. // // See the use restrictions. // public class Utility { /// <summary> /// Creates a spatial reference that will minimize distortion near the input point. Ideal for operations /// that will derive geometry based on that point (e.g. buffer). /// </summary> /// <param name="agsSoapPoint">Point to use as the center of the spatial reference's datum</param> /// <param name="geometryServerDcomProxy">Geometry service to use in creating the spatial reference</param> public static ESRI.ArcGIS.ADF.ArcGISServer.SpatialReference CreateOperationSpatialReference( ESRI.ArcGIS.ADF.ArcGISServer.PointN agsSoapPoint, ESRI.ArcGIS.ADF.ArcGISServer.GeometryServerDcomProxy geometryServerDcomProxy) { // If the input point's spatial reference uses a projected coordinate system, project the point to a // geographic coordinate system (WGS 1984 in this case). We do this because the point's coordinates // will be used to initialize the datum of the operation spatial reference if (agsSoapPoint.SpatialReference is ESRI.ArcGIS.ADF.ArcGISServer.ProjectedCoordinateSystem) { // Create an ArcGIS Server spatial reference initalized to use the WGS 1984 coordinate system ESRI.ArcGIS.ADF.ArcGISServer.SpatialReference agsSoapGeographicSpatialReference = new ESRI.ArcGIS.ADF.ArcGISServer.GeographicCoordinateSystem(); agsSoapGeographicSpatialReference.WKID = 4326; agsSoapGeographicSpatialReference.WKIDSpecified = true; // Place the input point in an array for the project operation ESRI.ArcGIS.ADF.ArcGISServer.Geometry[] agsSoapInputGeometryArray = new ESRI.ArcGIS.ADF.ArcGISServer.Geometry[1]; agsSoapInputGeometryArray[0] = agsSoapPoint; // Execute the projection ESRI.ArcGIS.ADF.ArcGISServer.Geometry[] agsSoapOutputGeometryArray = geometryServerDcomProxy.Project(agsSoapPoint.SpatialReference, agsSoapGeographicSpatialReference, true, null, null, agsSoapInputGeometryArray); // Retrieve the projected point from the results array agsSoapPoint = agsSoapOutputGeometryArray[0] as ESRI.ArcGIS.ADF.ArcGISServer.PointN; } // Create the definition string for the operation spatial reference's coordinate system. We will use // the Hotine Oblique Mercator coordinate system because it lends itself well to minimizing operational // distortion anywhere on the earth string hotineObliqueMercatorDefinition = @" PROJCS[""World_Hotine"", GEOGCS[""GCS_WGS_1984"", DATUM[""D_WGS_1984"", SPHEROID[""WGS_1984"",6378137.0,298.257223563]], PRIMEM[""Greenwich"",0.0], UNIT[""Degree"",0.0174532925199433]], PROJECTION[""Hotine_Oblique_Mercator_Two_Point_Natural_Origin""], PARAMETER[""False_Easting"",0.0], PARAMETER[""False_Northing"",0.0], PARAMETER[""Latitude_Of_1st_Point"",{0}], PARAMETER[""Latitude_Of_2nd_Point"",{1}], PARAMETER[""Scale_Factor"",1.0], PARAMETER[""Longitude_Of_1st_Point"",{2}], PARAMETER[""Longitude_Of_2nd_Point"",{3}], PARAMETER[""Latitude_Of_Center"",{4}], UNIT[""Meter"",1.0]]"; // Specify the coordinate system's datum parameters based on the projected point's coordinates string customHotineObliqueCylindricalMercator = string.Format( hotineObliqueMercatorDefinition, agsSoapPoint.Y - 1, agsSoapPoint.Y + 1, agsSoapPoint.X - 1, agsSoapPoint.X + 1, agsSoapPoint.Y); // Create the spatial reference ESRI.ArcGIS.ADF.ArcGISServer.SpatialReference agsSoapBufferSpatialReference = geometryServerDcomProxy.FindSRByWKT(customHotineObliqueCylindricalMercator, null, true, true); return agsSoapBufferSpatialReference; } /// <summary> /// Creates a spatial reference that will minimize distortion near the input point. Ideal for operations /// that will derive geometry based on that point (e.g. buffer). /// </summary> /// <param name="aoPoint">Point to use as the center of the spatial reference's datum</param> /// <param name="geometryServer">Geometry service to use in creating the spatial reference</param> public static ESRI.ArcGIS.Geometry.ISpatialReference CreateOperationSpatialReference( ESRI.ArcGIS.Geometry.IPoint aoPoint, ESRI.ArcGIS.Server.IServerContext geometryServerContext) { ESRI.ArcGIS.Geometry.IGeometryServer geometryServer = geometryServerContext.ServerObject as ESRI.ArcGIS.Geometry.IGeometryServer; ESRI.ArcGIS.Geometry.IPoint aoGeographicPoint = null; // If the input point's spatial reference uses a projected coordinate system, project the point to a // geographic coordinate system (WGS 1984 in this case). We do this because the point's coordinates // will be used to define the projection parameters of the operations spatial reference. if (aoPoint.SpatialReference is ESRI.ArcGIS.Geometry.ProjectedCoordinateSystem) { // Create an ArcGIS Server spatial reference initalized to use the WGS 1984 coordinate system ESRI.ArcGIS.Geometry.ISpatialReference aoGeographicSpatialReference = geometryServer.FindSRByWKID(null, 4326, -1, true, true); // Store the point in an array for passing to the project operation ESRI.ArcGIS.Geometry.IGeometryArray aoInputGeometryArray = geometryServerContext.CreateObject("esriGeometry.GeometryArray") as ESRI.ArcGIS.Geometry.IGeometryArray; aoInputGeometryArray.Add(aoPoint); // Create a transformation object to specify the GCS transformation ESRI.ArcGIS.Geometry.ISpatialReferenceFactory spatialReferenceFactory = (ESRI.ArcGIS.Geometry.ISpatialReferenceFactory)geometryServerContext.CreateObject("esriGeometry.SpatialReferenceEnvironment"); ESRI.ArcGIS.Geometry.ITransformation aoTransformation = spatialReferenceFactory.CreateGeoTransformation(1188); // Execute the project operation ESRI.ArcGIS.Geometry.IGeometryArray aoOutputGeomeryArray = geometryServer.Project( aoPoint.SpatialReference, aoGeographicSpatialReference, ESRI.ArcGIS.Geometry.esriTransformDirection.esriTransformForward, aoTransformation, null, aoInputGeometryArray); // Retrieve the projected point from the operation results aoGeographicPoint = aoOutputGeomeryArray.get_Element(0) as ESRI.ArcGIS.Geometry.IPoint; } // Create the definition string for the operation spatial reference's coordinate system. We will use // the Hotine Oblique Mercator coordinate system because it lends itself well to minimizing operational // distortion anywhere on the earth string hotineObliqueMercatorDefinition = @" PROJCS[""World_Hotine"", GEOGCS[""GCS_WGS_1984"", DATUM[""D_WGS_1984"", SPHEROID[""WGS_1984"",6378137.0,298.257223563]], PRIMEM[""Greenwich"",0.0], UNIT[""Degree"",0.0174532925199433]], PROJECTION[""Hotine_Oblique_Mercator_Two_Point_Natural_Origin""], PARAMETER[""False_Easting"",0.0], PARAMETER[""False_Northing"",0.0], PARAMETER[""Latitude_Of_1st_Point"",{0}], PARAMETER[""Latitude_Of_2nd_Point"",{1}], PARAMETER[""Scale_Factor"",1.0], PARAMETER[""Longitude_Of_1st_Point"",{2}], PARAMETER[""Longitude_Of_2nd_Point"",{3}], PARAMETER[""Latitude_Of_Center"",{4}], UNIT[""Meter"",1.0]]"; // Specify the coordinate system's datum parameters based on the projected point's coordinates string customHotineObliqueCylindricalMercator = string.Format( hotineObliqueMercatorDefinition, aoGeographicPoint.Y - 1, aoGeographicPoint.Y + 1, aoGeographicPoint.X - 1, aoGeographicPoint.X + 1, aoGeographicPoint.Y); // Create the spatial reference ESRI.ArcGIS.Geometry.ISpatialReference aoOperationSpatialReference = geometryServer.FindSRByWKT(customHotineObliqueCylindricalMercator, null, true, true); return aoOperationSpatialReference; } /// <summary> /// Returns an ArcGIS Server LinearUnit corresponding to the passed in esriUnits enumeration /// </summary> /// <param name="unitType"></param> /// <returns></returns> public static ESRI.ArcGIS.ADF.ArcGISServer.LinearUnit ConvertUnitType(ESRI.ArcGIS.ADF.ArcGISServer.esriUnits unitType) { // Instantiate an ArcGI Server linear unit and specify its WKID (well-known identifier) based on // the passed-in enumeration ESRI.ArcGIS.ADF.ArcGISServer.LinearUnit linearUnit = new ESRI.ArcGIS.ADF.ArcGISServer.LinearUnit(); switch (unitType) { case ESRI.ArcGIS.ADF.ArcGISServer.esriUnits.esriCentimeters: linearUnit.WKID = 109006; break; case ESRI.ArcGIS.ADF.ArcGISServer.esriUnits.esriDecimalDegrees: linearUnit.WKID = 9102; break; case ESRI.ArcGIS.ADF.ArcGISServer.esriUnits.esriDecimeters: linearUnit.WKID = 109005; break; case ESRI.ArcGIS.ADF.ArcGISServer.esriUnits.esriFeet: linearUnit.WKID = 9003; break; case ESRI.ArcGIS.ADF.ArcGISServer.esriUnits.esriInches: linearUnit.WKID = 109008; break; case ESRI.ArcGIS.ADF.ArcGISServer.esriUnits.esriKilometers: linearUnit.WKID = 9036; break; case ESRI.ArcGIS.ADF.ArcGISServer.esriUnits.esriMeters: linearUnit.WKID = 9001; break; case ESRI.ArcGIS.ADF.ArcGISServer.esriUnits.esriMiles: linearUnit.WKID = 9035; break; case ESRI.ArcGIS.ADF.ArcGISServer.esriUnits.esriMillimeters: linearUnit.WKID = 109007; break; case ESRI.ArcGIS.ADF.ArcGISServer.esriUnits.esriNauticalMiles: linearUnit.WKID = 9030; break; case ESRI.ArcGIS.ADF.ArcGISServer.esriUnits.esriYards: linearUnit.WKID = 109002; break; } linearUnit.WKIDSpecified = true; return linearUnit; } /// <summary> /// Returns an ArcObjects IUnit corresponding to the passed in esriUnits enumeration /// </summary> /// <param name="unitType"></param> /// <param name="spatialReferenceEnvironment"></param> /// <returns></returns> public static ESRI.ArcGIS.Geometry.IUnit ConvertUnitType(ESRI.ArcGIS.esriSystem.esriUnits unitType, ESRI.ArcGIS.Geometry.SpatialReferenceEnvironment spatialReferenceEnvironment) { // Create an ArcObjects IUnit object from a well-known identifier that is determined by the // value of the passed-in enumeration ESRI.ArcGIS.Geometry.IUnit linearUnit = null; switch (unitType) { case ESRI.ArcGIS.esriSystem.esriUnits.esriCentimeters: linearUnit = spatialReferenceEnvironment.CreateUnit(109006); break; case ESRI.ArcGIS.esriSystem.esriUnits.esriDecimalDegrees: linearUnit = spatialReferenceEnvironment.CreateUnit(9102); break; case ESRI.ArcGIS.esriSystem.esriUnits.esriDecimeters: linearUnit = spatialReferenceEnvironment.CreateUnit(109005); break; case ESRI.ArcGIS.esriSystem.esriUnits.esriFeet: linearUnit = spatialReferenceEnvironment.CreateUnit(9003); break; case ESRI.ArcGIS.esriSystem.esriUnits.esriInches: linearUnit = spatialReferenceEnvironment.CreateUnit(109008); break; case ESRI.ArcGIS.esriSystem.esriUnits.esriKilometers: linearUnit = spatialReferenceEnvironment.CreateUnit(9036); break; case ESRI.ArcGIS.esriSystem.esriUnits.esriMeters: linearUnit = spatialReferenceEnvironment.CreateUnit(9001); break; case ESRI.ArcGIS.esriSystem.esriUnits.esriMiles: linearUnit = spatialReferenceEnvironment.CreateUnit(9035); break; case ESRI.ArcGIS.esriSystem.esriUnits.esriMillimeters: linearUnit = spatialReferenceEnvironment.CreateUnit(109007); break; case ESRI.ArcGIS.esriSystem.esriUnits.esriNauticalMiles: linearUnit = spatialReferenceEnvironment.CreateUnit(9030); break; case ESRI.ArcGIS.esriSystem.esriUnits.esriYards: linearUnit = spatialReferenceEnvironment.CreateUnit(109002); break; } return linearUnit; } }