Provides access to members that create different kinds of spatial reference components.
Members
| Name | Description | |
|---|---|---|
 |
CreateDatum | Creates a predefined datum. |
|
CreateESRISpatialReference | Creates a spatial reference system and defines it from the specified ESRISpatialReference buffer. |
|
CreateESRISpatialReferenceFromPRJ | Creates a spatial reference from a PRJ string. |
|
CreateESRISpatialReferenceFromPRJFile | Creates a spatial reference from a PRJ file. |
|
CreateGeographicCoordinateSystem | Creates a predefined geographic coordinate system. |
|
CreateGeoTransformation | Creates a predefined transformation between geographic coordinate systems. |
|
CreateParameter | Creates a predefined parameter. |
|
CreatePredefinedAngularUnits | Creates a list of predefined angular units. |
|
CreatePredefinedDatums | Creates a list of a list of predefined datums. |
|
CreatePredefinedLinearUnits | Creates a list of predefined linear units. |
|
CreatePredefinedPrimeMeridians | Creates a list of predefined prime meridians. |
|
CreatePredefinedProjections | Creates a list of predefined projections. |
|
CreatePredefinedSpheroids | Creates a list of predefined spheroids. |
|
CreatePrimeMeridian | Creates a predefined prime meridian. |
|
CreateProjectedCoordinateSystem | Creates a predefined projected coordinate system. |
|
CreateProjection | Creates a predefined projection. |
|
CreateSpheroid | Creates a predefined spheroid. |
|
CreateUnit | Creates a predefined unit of measure. |
|
ExportESRISpatialReferenceToPRJFile | Exports a spatial reference to a PRJ file. |
ISpatialReferenceFactory.CreateDatum Method
Creates a predefined datum.
Public Function CreateDatum ( _
ByVal datumType As Integer _
) As IDatum
public IDatum CreateDatum (
int datumType
);
Description
Use an element from the esriSRDatumType, esriSRDatum2Type, or esriSRDatum3Type enumerations as the datumType to create a particular predefined horizontal datum.
ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
//Create the datum using the available datums. These can be
//found in the esriGeometry esriSRDatumType enumeration.
IDatum datum = spatialReferenceFactory.CreateDatum((int)esriSRDatumType.esriSRDatum_NAD1983);
ISpatialReferenceFactory.CreateESRISpatialReference Method
Creates a spatial reference system and defines it from the specified ESRISpatialReference buffer.
Public Sub CreateESRISpatialReference ( _
ByVal spatRefInfo As String, _
ByRef SpatialReference As ISpatialReference, _
ByRef cBytesRead As Integer _
)
public void CreateESRISpatialReference (
string spatRefInfo,
ref ISpatialReference SpatialReference,
ref int cBytesRead
);
ISpatialReferenceFactory.CreateESRISpatialReferenceFromPRJ Method
Creates a spatial reference from a PRJ string.
Public Function CreateESRISpatialReferenceFromPRJ ( _
ByVal prj As String _
) As ISpatialReference
public ISpatialReference CreateESRISpatialReferenceFromPRJ (
string prj
);
Description
Not implemented for GeographicCoordinateSystem and ProjectedCoordinateSystem. Use the CreateESRISpatialReference or CreateESRISpatialReferenceFromPRJFile methods instead.
ISpatialReferenceFactory.CreateESRISpatialReferenceFromPRJFile Method
Creates a spatial reference from a PRJ file.
Public Function CreateESRISpatialReferenceFromPRJFile ( _
ByVal prjFile As String _
) As ISpatialReference
public ISpatialReference CreateESRISpatialReferenceFromPRJFile (
string prjFile
);
Remarks
Both old style (workstation) and new style (ArcGIS for Desktop Basic) prj files can be used with this method to create spatial reference system objects.
public void CreateESRISpatialReferenceFromPRJFileExample()
{
//The ISpatialReferenceFactory::CreateESRISpatialReferenceFromPRJFile
//method requires that you specify the path and filename of the PRJ
//file you wish to import to create a spatial reference from.
// use activator class with SpatialReferenceEnvironment singleton
Type factoryType = Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
System.Object obj = Activator.CreateInstance(factoryType);
ISpatialReferenceFactory3 spatialReferenceFactory = obj as ISpatialReferenceFactory3;
ISpatialReference spatialReference = spatialReferenceFactory.
CreateESRISpatialReferenceFromPRJFile("C:\\Program Files\\ArcGIS\\Coordinate Systems\\Geographic Coordinate Systems\\World\\WGS 1984.prj");
}
'The ISpatialReferenceFactory::CreateESRISpatialReferenceFromPRJFile
'method requires that you specify the path and filename of the PRJ
'file you wish to import to create a spatial reference from.
Dim pSpatRefFact As ESRI.ArcGIS.Geometry.ISpatialReferenceFactory
pSpatRefFact = New ESRI.ArcGIS.Geometry.SpatialReferenceEnvironment
Dim pSpatRef As ESRI.ArcGIS.Geometry.ISpatialReference
pSpatRef = pSpatRefFact.CreateESRISpatialReferenceFromPRJFile("c:\geodata\prj_import.prj")
ISpatialReferenceFactory.CreateGeographicCoordinateSystem Method
Creates a predefined geographic coordinate system.
Public Function CreateGeographicCoordinateSystem ( _
ByVal gcsType As Integer _
) As IGeographicCoordinateSystem
public IGeographicCoordinateSystem CreateGeographicCoordinateSystem (
int gcsType
);
Description
Use an element from the esriSRGeoCSType, esriSRGeoCS2Type, or esriSRGeoCS3Type enumerations as the gcsType to create a particular predefined geographic coordinate system.
Remarks
The example code shows how to create an object that represents the WGS 1984 geographic coordinate system.
ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
//Create a geographic coordinate system using the available geographic
//coordinate systems. These can be found in the esriGeometry esriSRGeoCSType
//enumeration.
IGeographicCoordinateSystem geographicCoordinateSystem = spatialReferenceFactory.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_WGS1984);
Dim pSpatRefFact As ESRI.ArcGIS.Geometry.ISpatialReferenceFactory
'Set the spatial reference factory to a new spatial reference environment
pSpatRefFact = New ESRI.ArcGIS.Geometry.SpatialReferenceEnvironment
Dim pGCS As ESRI.ArcGIS.Geometry.IGeographicCoordinateSystem
'Create a geographic coordinate system using the available geographic
'coordinate systems. These can be found in the esriGeometry esriSRGeoCSType
'enumeration.
pGCS = pSpatRefFact.CreateGeographicCoordinateSystem(ESRI.ArcGIS.Geometry.esriSRGeoCSType.esriSRGeoCS_WGS1984)
ISpatialReferenceFactory.CreateGeoTransformation Method
Creates a predefined transformation between geographic coordinate systems.
Public Function CreateGeoTransformation ( _
ByVal gTransformationType As Integer _
) As ITransformation
public ITransformation CreateGeoTransformation (
int gTransformationType
);
Description
Use an element from the esriSRGeoTransformationType, esriSRGeoTransformation2Type, or esriSRGeoTransformation3Type enumerations as the gTransformationType to create a particular predefined geographic (datum) transformation.
ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
//Create a geographic (datum) transformation using the predefined geographic
//transformations. These can be found in the esriGeometry esriSRGeoTransformationType
//and esriSRGeoTransformation2Type enumerations.
IGeoTransformation geoTransformation = spatialReferenceFactory.CreateGeoTransformation((int)esriSRGeoTransformation2Type.esriSRGeoTransformation_NAD_1983_TO_HARN_MO) as IGeoTransformation;
Dim pSpatRefFact As ESRI.ArcGIS.Geometry.ISpatialReferenceFactory
'Set the spatial reference factory to a new spatial reference environment
pSpatRefFact = New ESRI.ArcGIS.Geometry.SpatialReferenceEnvironment
Dim pGeoTran As ESRI.ArcGIS.Geometry.IGeoTransformation
'Create a geographic (datum) transformation using the predefined geographic
'transformations. These can be found in the esriGeometry esriSRGeoTransformationType
'and esriSRGeoTransformation2Type enumerations.
pGeoTran = pSpatRefFact.CreateGeoTransformation(ESRI.ArcGIS.Geometry.esriSRGeoTransformation2Type.esriSRGeoTransformation_NAD_1983_TO_HARN_MO)
ISpatialReferenceFactory.CreateParameter Method
Creates a predefined parameter.
Public Function CreateParameter ( _
ByVal parameterType As Integer _
) As IParameter
public IParameter CreateParameter (
int parameterType
);
Description
Use an element from the esriSRParameterType, esriSRParameter2Type, esriSRParameter3Type, or esriSRParameter4Type enumerations as the ParameterType to create a particular predefined parameter.
ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass(); // Declare an array of IParameters, and for each, create the required Parameter object
// by using ISpatialReferenceFactory::CreateParamater. Then assign the parameter
// a value. Below is an example used for a Transverse Mercator projection
IParameter[] parameterArray = new IParameter[5];
parameterArray[0] = spatialReferenceFactory.CreateParameter((int)esriSRParameterType.esriSRParameter_FalseEasting);
parameterArray[0].Value = 500000;
parameterArray[1] = spatialReferenceFactory.CreateParameter((int)esriSRParameterType.esriSRParameter_FalseNorthing);
parameterArray[1].Value = 0;
parameterArray[2] = spatialReferenceFactory.CreateParameter((int)esriSRParameterType.esriSRParameter_CentralMeridian);
parameterArray[2].Value = -123;
parameterArray[3] = spatialReferenceFactory.CreateParameter((int)esriSRParameterType.esriSRParameter_LatitudeOfOrigin);
parameterArray[3].Value = 0;
parameterArray[4] = spatialReferenceFactory.CreateParameter((int)esriSRParameterType.esriSRParameter_ScaleFactor);
parameterArray[4].Value = 0.9996;
'This example shows you how to declare a safe array of IParameter,
'and for each, create the required Parameter object by using
'ISpatialReferenceFactory::CreateParameter and assign each parameter a value.
'Parameter types can be found in the esriGeometry esriSRParameterType
'enumeration. Below is an example used for a Transverse Mercator projection.
Dim pSpatRefFact As ESRI.ArcGIS.Geometry.ISpatialReferenceFactory
pSpatRefFact = New ESRI.ArcGIS.Geometry.SpatialReferenceEnvironment
Dim aParamArray(5) As ESRI.ArcGIS.Geometry.IParameter
aParamArray(0) = pSpatRefFact.CreateParameter(ESRI.ArcGIS.Geometry.esriSRParameterType.esriSRParameter_FalseEasting)
aParamArray(0).Value = 500000
aParamArray(1) = pSpatRefFact.CreateParameter(ESRI.ArcGIS.Geometry.esriSRParameterType.esriSRParameter_FalseNorthing)
aParamArray(1).Value = 0
aParamArray(2) = pSpatRefFact.CreateParameter(ESRI.ArcGIS.Geometry.esriSRParameterType.esriSRParameter_CentralMeridian)
aParamArray(2).Value = -123
aParamArray(3) = pSpatRefFact.CreateParameter(ESRI.ArcGIS.Geometry.esriSRParameterType.esriSRParameter_LatitudeOfOrigin)
aParamArray(3).Value = 0
aParamArray(4) = pSpatRefFact.CreateParameter(ESRI.ArcGIS.Geometry.esriSRParameterType.esriSRParameter_ScaleFactor)
aParamArray(4).Value = 0.9996
'Below is an example for an Albers projection:
Dim pSpatRefFact As ESRI.ArcGIS.Geometry.ISpatialReferenceFactory
pSpatRefFact = New ESRI.ArcGIS.Geometry.SpatialReferenceEnvironment
Dim aParamArray(6) As ESRI.ArcGIS.Geometry.IParameter
aParamArray(0) = pSpatRefFact.CreateParameter(ESRI.ArcGIS.Geometry.esriSRParameterType.esriSRParameter_FalseEasting)
aParamArray(0).Value = 0
aParamArray(1) = pSpatRefFact.CreateParameter(ESRI.ArcGIS.Geometry.esriSRParameterType.esriSRParameter_FalseNorthing)
aParamArray(1).Value = 0
aParamArray(2) = pSpatRefFact.CreateParameter(ESRI.ArcGIS.Geometry.esriSRParameterType.esriSRParameter_CentralMeridian)
aParamArray(2).Value = -96
aParamArray(3) = pSpatRefFact.CreateParameter(ESRI.ArcGIS.Geometry.esriSRParameterType.esriSRParameter_StandardParallel1)
aParamArray(3).Value = 29.5
aParamArray(4) = pSpatRefFact.CreateParameter(ESRI.ArcGIS.Geometry.esriSRParameterType.esriSRParameter_StandardParallel2)
aParamArray(4).Value = 45.5
aParamArray(5) = pSpatRefFact.CreateParameter(ESRI.ArcGIS.Geometry.esriSRParameterType.esriSRParameter_CentralParallel)
aParamArray(5).Value = 37.5
ISpatialReferenceFactory.CreatePredefinedAngularUnits Method
Creates a list of predefined angular units.
Public Function CreatePredefinedAngularUnits ( _
) As ISet
public ISet CreatePredefinedAngularUnits (
);
Description
Returns a list of all predefined angular units. The list has two columns: the factory code and the name.
ISpatialReferenceFactory.CreatePredefinedDatums Method
Creates a list of a list of predefined datums.
Public Function CreatePredefinedDatums ( _
) As ISet
public ISet CreatePredefinedDatums (
);
Description
Returns a list of all predefined horizontal datums. The list has two columns: the factory code and the name.
ISpatialReferenceFactory.CreatePredefinedLinearUnits Method
Creates a list of predefined linear units.
Public Function CreatePredefinedLinearUnits ( _
) As ISet
public ISet CreatePredefinedLinearUnits (
);
Description
Returns a list of all predefined linear units. The list has two columns: the factory code and the name.
ISpatialReferenceFactory.CreatePredefinedPrimeMeridians Method
Creates a list of predefined prime meridians.
Public Function CreatePredefinedPrimeMeridians ( _
) As ISet
public ISet CreatePredefinedPrimeMeridians (
);
Description
Returns a list of all predefined prime meridians. The list has two columns: the factory code and the name.
private void PrintPrimeMeridian()
{
// use activator class with SpatialReferenceEnvironment singleton
Type factoryType = Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
System.Object obj = Activator.CreateInstance(factoryType);
ISpatialReferenceFactory spatialReferenceFactory = obj as ISpatialReferenceFactory;
ISet primeMeridiansSet = spatialReferenceFactory.CreatePredefinedPrimeMeridians();
System.Windows.Forms.MessageBox.Show("Number of projections = " + primeMeridiansSet.Count);
for (int i = 0; i < primeMeridiansSet.Count; i++)
{
IPrimeMeridian primeMeridian = primeMeridiansSet.Next() as IPrimeMeridian;
System.Windows.Forms.MessageBox.Show(primeMeridian.Name);
}
}
ISpatialReferenceFactory.CreatePredefinedProjections Method
Creates a list of predefined projections.
Public Function CreatePredefinedProjections ( _
) As ISet
public ISet CreatePredefinedProjections (
);
Description
Create a set of all predefined map projection objects.
Remarks
A Projection object encapsulates the mathematics needed to convert geographic coordinates between two different coordinate systems. A projection is a component of a projected coordinate system and is not usually used directly. Rather, a projected cooordinate system is defined and used to project cooordinates.
//This example shows how the CreatePredefinedProjections function returns a
//set that contains all the available Projection objects. The set is iterated
//through, and the name of each Projection with the set is obtained. These
//type of functions are useful for developers who may wish to populate a
//pulldown selection list of available SpatialReference objects.
'This example shows how the CreatePredefinedProjections function returns a
'set that contains all the available Projection objects. The set is iterated
'through, and the name of each Projection with the set is obtained. These
'type of functions are useful for developers who may wish to populate a
'pulldown selection list of available SpatialReference objects.
Dim pProjection As ESRI.ArcGIS.Geometry.IProjection
Dim pProjectionSet As ESRI.ArcGIS.esriSystem.ISet
Dim pSpatialRefFact As ESRI.ArcGIS.Geometry.ISpatialReferenceFactory
pSpatialRefFact = New ESRI.ArcGIS.Geometry.SpatialReferenceEnvironment
pProjectionSet = pSpatialRefFact.CreatePredefinedProjections
Debug.Print(pProjectionSet.Count)
Dim i As Integer
pProjectionSet.Reset()
For i = 0 To pProjectionSet.Count - 1
pProjection = pProjectionSet.Next
Debug.Print(pProjection.Name)
Next i
ISpatialReferenceFactory.CreatePredefinedSpheroids Method
Creates a list of predefined spheroids.
Public Function CreatePredefinedSpheroids ( _
) As ISet
public ISet CreatePredefinedSpheroids (
);
Description
Returns a list of all predefined spheroids. The list has two columns: the factory code and the name.
ISpatialReferenceFactory.CreatePrimeMeridian Method
Creates a predefined prime meridian.
Public Function CreatePrimeMeridian ( _
ByVal primeMeridianType As Integer _
) As IPrimeMeridian
public IPrimeMeridian CreatePrimeMeridian (
int primeMeridianType
);
Description
Use an element from the esriSRPrimeMType or esriSRPrimeM2Type enumerations as the primeMeridianType to create a particular predefined prime meridian.
ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
//Create the prime meridian using the available prime meridians. These can be
//found in the esriGeometry esriSRPrimeMType enumeration.
IPrimeMeridian primeMeridian = spatialReferenceFactory.CreatePrimeMeridian((int)esriSRPrimeMType.esriSRPrimeM_Greenwich);
Dim pSpatRefFact As ESRI.ArcGIS.Geometry.ISpatialReferenceFactory
'Set the spatial reference factory to a new spatial reference environment
pSpatRefFact = New ESRI.ArcGIS.Geometry.SpatialReferenceEnvironment
Dim pPrimeM As ESRI.ArcGIS.Geometry.IPrimeMeridian
'Create the prime meridian using the available prime meridians. These can be
'found in the esriGeometry esriSRPrimeMType enumeration.
pPrimeM = pSpatRefFact.CreatePrimeMeridian(ESRI.ArcGIS.Geometry.esriSRPrimeMType.esriSRPrimeM_Greenwich)
ISpatialReferenceFactory.CreateProjectedCoordinateSystem Method
Creates a predefined projected coordinate system.
Public Function CreateProjectedCoordinateSystem ( _
ByVal pcsType As Integer _
) As IProjectedCoordinateSystem
public IProjectedCoordinateSystem CreateProjectedCoordinateSystem (
int pcsType
);
Description
Use an element from the esriSRProjCSType, esriSRProjCS2Type, esriSRProjCS3Type, or esriSRProjCS4Type enumerations as the pcsType to create a particular predefined projected coordinate system.
private void CreateProjectedCoordinateSystem()
{
ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
//Create a projected coordinate system using the available projected coordinate systems
IProjectedCoordinateSystem projectedCoordinateSystem1 = spatialReferenceFactory.CreateProjectedCoordinateSystem((int)esriSRProjCSType.esriSRProjCS_World_Mercator);
//Here is an more detailed example for creating a pre-defined projected coordinate
//system for a new Shapefile using the 'ISpatialReferenceFactory::CreateProjectedCoordinateSystem method
//Create the pre-defined projected coordinate system object
IProjectedCoordinateSystem projectedCoordinateSystem2 = spatialReferenceFactory.CreateProjectedCoordinateSystem((int)esriSRProjCSType.esriSRProjCS_NAD1983SPCS_TXSouthCentFT);
ISpatialReference spatialReference = projectedCoordinateSystem2 as ISpatialReference;
//Set the false origin and units for the spatial reference.
//You can use either the Domain or the FalseOriginAndUnits methods.
// spatialReference.SetFalseOriginAndUnits(0, 0, 0);
spatialReference.SetDomain(-1000000, 10000000, -1000000, 10000000);
// spatialReference.SetMDomain(0, 1);
spatialReference.SetMFalseOriginAndUnits(1, 1);
// spatialReference.SetZDomain(0, 1);
spatialReference.SetZFalseOriginAndUnits(1, 1);
// Create a new SDE workspace
IWorkspaceFactory sdeWorkspaceFactory = new ESRI.ArcGIS.DataSourcesGDB.SdeWorkspaceFactoryClass();
IWorkspace workspace = sdeWorkspaceFactory.OpenFromFile("C:\\Documents and Settings\\bast5010\\Application Data\\ESRI\\ArcCatalog\\Connection to Vampire.sde", 0);
IFeatureWorkspace sdeFeatureWorkspace = workspace as IFeatureWorkspace;
//Create the fields for the feature dataset
IFields fields = new FieldsClass();
IFieldsEdit fieldsEdit = fields as IFieldsEdit;
IField field = new FieldClass();
IFieldEdit fieldEdit = field as IFieldEdit;
fieldEdit.Type_2 = esriFieldType.esriFieldTypeOID;
fieldEdit.IsNullable_2 = false;
fieldEdit.Name_2 = "OID";
fieldsEdit.AddField(fieldEdit);
IGeometryDefEdit geometryDefEdit = new GeometryDefClass();
geometryDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPolygon;
geometryDefEdit.GridCount_2 = 1;
geometryDefEdit.set_GridSize(0, 1000);
geometryDefEdit.SpatialReference_2 = spatialReference;
fieldEdit = new FieldClass();
fieldEdit.Name_2 = "Shape";
fieldEdit.IsNullable_2 = true;
fieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;
fieldEdit.GeometryDef_2 = geometryDefEdit;
fieldsEdit.AddField(fieldEdit);
fieldEdit = new FieldClass();
fieldEdit.Name_2 = "Test_Field";
fieldEdit.IsNullable_2 = true;
fieldEdit.Editable_2 = true;
fieldEdit.Length_2 = 25;
fieldEdit.Type_2 = esriFieldType.esriFieldTypeString;
fieldsEdit.AddField(fieldEdit);
//Create a UID for the CreateFeatureClass method
UID uid = new UIDClass();
uid.Generate();
//Create ExtCLSID as for CreateFeatureClass method
UID uidExt = new UIDClass();
uidExt.Generate();
//Create the feature class for the feature dataset
IFeatureClass featureClass = sdeFeatureWorkspace.CreateFeatureClass("PreDef_StateNAD83", fields, null, null, esriFeatureType.esriFTSimple, "Shape", "");
System.Windows.Forms.MessageBox.Show("Data Creation Complete", "Program Status");
}
Private Sub CreateProjectedCoordinateSystem()
Dim pSpatRefFact As ESRI.ArcGIS.Geometry.ISpatialReferenceFactory
'Set the spatial reference factory to a new spatial reference environment
pSpatRefFact = New ESRI.ArcGIS.Geometry.SpatialReferenceEnvironment
Dim pProjCoordSys As ESRI.ArcGIS.Geometry.IProjectedCoordinateSystem
'Create a projected coordinate system using the available projected coordinate systems
pProjCoordSys = pSpatRefFact.CreateProjectedCoordinateSystem(ESRI.ArcGIS.Geometry.esriSRProjCSType.esriSRProjCS_World_Mercator)
'Here is an more detailed example for creating a pre-defined projected coordinate
'system for a new Shapefile using the 'ISpatialReferenceFactory::CreateProjectedCoordinateSystem method
'Create the pre-defined projected coordinate system object
pProjCoordSys = pSpatRefFact.CreateProjectedCoordinateSystem(ESRI.ArcGIS.Geometry.esriSRProjCSType.esriSRProjCS_NAD1983SPCS_TXSouthCentFT)
Dim pSpatRef As ESRI.ArcGIS.Geometry.ISpatialReference
pSpatRef = pProjCoordSys
'Set the domain extents for the new dataset
pSpatRef.SetDomain(-10000000, 10000000, -10000000, 10000000)
'pSpatRef.SetFalseOriginAndUnits 0, 0, 0
pSpatRef.SetMDomain(1, 1)
'pSpatRef.SetMFalseOriginAndUnits 1, 1
pSpatRef.SetZDomain(0, 1)
'pSpatRef.SetZFalseOriginAndUnits 1, 1
'Create a new SDE workspace
Dim pSdeWorkspaceFactory As ESRI.ArcGIS.Geodatabase.IWorkspaceFactory
pSdeWorkspaceFactory = New ESRI.ArcGIS.DataSourcesGDB.SdeWorkspaceFactory
Dim pWorkspace As ESRI.ArcGIS.Geodatabase.IWorkspace
pWorkspace = pSdeWorkspaceFactory.OpenFromFile("C:\\Documents and Settings\\bast5010\\Application Data\\ESRI\\ArcCatalog\\Connection to Vampire.sde", 0)
Dim pSdeFeatureWorkspace As ESRI.ArcGIS.Geodatabase.IFeatureWorkspace
pSdeFeatureWorkspace = pWorkspace
'Creat the fields for new dataset
Dim pFlds As ESRI.ArcGIS.Geodatabase.IFields
pFlds = New ESRI.ArcGIS.Geodatabase.Fields
Dim pFldsEdit As ESRI.ArcGIS.Geodatabase.IFieldsEdit
pFldsEdit = pFlds
Dim pFld As ESRI.ArcGIS.Geodatabase.IField
pFld = New ESRI.ArcGIS.Geodatabase.Field
Dim pFldEdit As ESRI.ArcGIS.Geodatabase.IFieldEdit
pFldEdit = pFld
With pFldEdit
.Type_2 = 6
.IsNullable_2 = False
.Name_2 = "OID"
End With
pFldsEdit.AddField(pFldEdit)
Dim pGeodef As ESRI.ArcGIS.Geodatabase.IGeometryDefEdit
pGeodef = New ESRI.ArcGIS.Geodatabase.GeometryDef
With pGeodef
.GeometryType_2 = ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon
.GridCount_2 = 1
.GridSize_2(0) = 1000
.SpatialReference_2 = pSpatRef
End With
pFldEdit = New ESRI.ArcGIS.Geodatabase.Field
With pFldEdit
.Name_2 = "Shape"
.IsNullable_2 = True
.Type_2 = ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeGeometry
.GeometryDef_2 = pGeodef
End With
pFldsEdit.AddField(pFldEdit)
pFldEdit = New ESRI.ArcGIS.Geodatabase.Field
With pFldEdit
.Name_2 = "Test_Field"
.Editable_2 = True
.Length_2 = 25
.Type_2 = ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeString
End With
pFldsEdit.AddField(pFldEdit)
Dim pUID As New ESRI.ArcGIS.esriSystem.UID
pUID.Generate()
Dim pEXTCLSID As New ESRI.ArcGIS.esriSystem.UID
pEXTCLSID.Generate()
Dim shapeFieldName As String
shapeFieldName = "Shape"
Dim pOutputFeatureClass As ESRI.ArcGIS.Geodatabase.IFeatureClass
'Create the feature class
pOutputFeatureClass = pSdeFeatureWorkspace.CreateFeatureClass("PreDef_StateNAD83", pFlds, Nothing, Nothing, ESRI.ArcGIS.Geodatabase.esriFeatureType.esriFTSimple, "Shape", "")
MsgBox("Data Creation Complete", vbOKOnly, "Program ")
End Sub
ISpatialReferenceFactory.CreateProjection Method
Creates a predefined projection.
Public Function CreateProjection ( _
ByVal projectionType As Integer _
) As IProjection
public IProjection CreateProjection (
int projectionType
);
Description
Use an element from the esriSRProjectionType, esriSRProjection2Type, esriSRProjection3Type, or esriSRProjection4Type enumerations as the projectionType to create a particular predefined map projection.
ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
//Create a projections using the available projections. These can be
//found in the esriGeometry esriSRProjectionType, esriSRProjection2Type,
//esriSRProjection3Type, and esriSRProjection4Type enumerations.
IProjection projection = spatialReferenceFactory.CreateProjection((int)esriSRProjectionType.esriSRProjection_LambertConformalConic);
'Set the spatial reference factory to a new spatial reference environment
Dim pSpatRefFact As ESRI.ArcGIS.Geometry.ISpatialReferenceFactory
pSpatRefFact = New ESRI.ArcGIS.Geometry.SpatialReferenceEnvironment
'Create a projections using the available projections. These can be
'found in the esriGeometry esriSRProjectionType, esriSRProjection2Type,
'esriSRProjection3Type, and esriSRProjection4Type enumerations.
Dim pProj As ESRI.ArcGIS.Geometry.IProjection
pProj = pSpatRefFact.CreateProjection(ESRI.ArcGIS.Geometry.esriSRProjectionType.esriSRProjection_LambertConformalConic)
ISpatialReferenceFactory.CreateSpheroid Method
Creates a predefined spheroid.
Public Function CreateSpheroid ( _
ByVal spheroidType As Integer _
) As ISpheroid
public ISpheroid CreateSpheroid (
int spheroidType
);
Description
Use an element from the esriSRSpheroidType or esriSRSpheroid2Type enumerations as the spheroidType to create a particular predefined spheroid.
ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
//Create the spheroid using the available spheroids. These can be
//found in the esriGeometry esriSRSpheroidType enumeration.
ISpheroid spheroid = spatialReferenceFactory.CreateSpheroid((int)esriSRSpheroidType.esriSRSpheroid_Clarke1866);
Dim pSpatRefFact As ESRI.ArcGIS.Geometry.ISpatialReferenceFactory
'Set the spatial reference factory to a new spatial reference environment
pSpatRefFact = New ESRI.ArcGIS.Geometry.SpatialReferenceEnvironment
Dim pSpher As ESRI.ArcGIS.Geometry.ISpheroid 'Create the spheroid using the available spheroids. These can be
'found in the esriGeometry esriSRSpheroidType enumeration.
pSpher = pSpatRefFact.CreateSpheroid(ESRI.ArcGIS.Geometry.esriSRSpheroidType.esriSRSpheroid_Clarke1866)
ISpatialReferenceFactory.CreateUnit Method
Creates a predefined unit of measure.
Public Function CreateUnit ( _
ByVal unitType As Integer _
) As IUnit
public IUnit CreateUnit (
int unitType
);
Description
Use an element from the esriSRUnitType or esriSRUnit2Type enumerations as the unitType to create a particular predefined unit of measure.
ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
//Create the unit using the available units. These can be
//found in the esriGeometry esriSRUnitType enumeration.
ILinearUnit linearUnit = spatialReferenceFactory.CreateUnit((int)esriSRUnitType.esriSRUnit_Foot) as ILinearUnit;
Dim pSpatRefFact As ESRI.ArcGIS.Geometry.ISpatialReferenceFactory
'Set the spatial reference factory to a new spatial reference environment
pSpatRefFact = New ESRI.ArcGIS.Geometry.SpatialReferenceEnvironment
Dim pUnit As ESRI.ArcGIS.Geometry.ILinearUnit
'Create the unit using the available units. These can be
'found in the esriGeometry esriSRUnitType enumeration.
pUnit = pSpatRefFact.CreateUnit(ESRI.ArcGIS.Geometry.esriSRUnitType.esriSRUnit_Foot)
ISpatialReferenceFactory.ExportESRISpatialReferenceToPRJFile Method
Exports a spatial reference to a PRJ file.
Public Sub ExportESRISpatialReferenceToPRJFile ( _
ByVal prjFile As String, _
ByVal SpatialReference As ISpatialReference _
)
public void ExportESRISpatialReferenceToPRJFile (
string prjFile,
ISpatialReference SpatialReference
);
Description
ExportESRISpatialReferenceToPRJFile converts an ArcGIS style spatial reference into the well-known text string. Here is an example (reformatted):
GEOGCS["GCS_North_American_1983", DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433]]
``
Remarks
To convert a spatialreference into an ArcGIS for Desktop Advanced workstation format (for TINs, GRIDs, or coverages), use IPRJSpatialReferenceGEN_ExportSpatialReferenceToPRJ.
public void ExportESRISpatialReferenceToPRJFileExample()
{
//The ISpatialReferenceFactory::ExportESRISpatialReferenceToPRJFile
//method requires that you specify the path and filename of the output
//PRJ file you wish to create with the export. A valid spatial reference
//object containing spatial reference information is also required.
// use activator class with SpatialReferenceEnvironment singleton
Type factoryType = Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
System.Object obj = Activator.CreateInstance(factoryType);
ISpatialReferenceFactory3 spatialReferenceFactory = obj as ISpatialReferenceFactory3;
IProjectedCoordinateSystem projectedCoordinateSystem = spatialReferenceFactory.CreateProjectedCoordinateSystem((int)esriSRProjCSType.esriSRProjCS_WGS1984UTM_10N);
//Export the pcs to a prj file
String fileName = "c:\\temp\\utm10.prj";
spatialReferenceFactory.ExportESRISpatialReferenceToPRJFile(fileName, projectedCoordinateSystem);
}
'The ISpatialReferenceFactory::ExportESRISpatialReferenceToPRJFile
'method requires that you specify the path and filename of the output
'PRJ file you wish to create with the export. A valid spatial reference
'object containing spatial reference information is also required.
'pSpatRefFact represents an ISpatialReferenceFactory object
'pSpatRef represents an ISpatialReference object
pSpatRefFact.ExportESRISpatialReferenceToPRJFile("c:\geodata\prj_export", pSpatRef)
Classes that implement ISpatialReferenceFactory
| Classes | Description |
|---|---|
| SpatialReferenceEnvironment | Creates various spatial reference objects. |
Remarks
The ISpatialReferenceFactory interface provides methods that use the FactoryCode to generate predefined factory spatial reference objects. There are three types of functions on this interface: those that return single objects, those that return a set of objects of the same type, and those that are used to import and export SpatialReference objects to and from a PRJ file or a PRJ string representation. For example, the CreateGeographicCoordinateSystem function takes as its only parameter an integer that represents the FactoryCode of a predefined geographic coordinate system. The function returns a GCS whose coordinate system has been defined. Its coordinate grids and tolerance, though, have not yet been defined.
Thousands of coordinate system related objects are available through the esriSR... enumerations. To maintain compatibility between versions, each object, such as a geographic coordinate system, will have more than one enumeration. Use the enumeration elements (for example, esriSRGeoCS_WGS1984) rather than the integer value it represents. Many of the FactoryCode values are based on an external standard and the values may change.
The next type of function on the ISpatialReferenceFactory interface returns a complete Set of objects. These type of functions are useful for developers who may wish to populate a pulldown selection list of available SpatialReference objects.
The third type of function supported by ISpatialReferenceFactory deals with PRJ files and strings. CreateESRISpatialReferenceFromPRJFile takes an old or new style PRJ file and creates either a geographic or projected coordinate system from it, depending on the file contents. The old style PRJ is used with coverages, TINs, and GRIDs. CreateESRISpatialReferenceFromPRJ is used to create a SpatialReference based on the string buffer of an old style PRJ file. While CreateESRISpatialReference is similar, the string buffer must be in the format of a new PRJ file.Conversely, the ExportESRISpatialReferenceToPRJFile function provides a mechanism to take a SpatialReference object and create a new style PRJ file from it. These four functions provide you with a way to take advantage of existing routines that involve the use of PRJ files. They also provide an easy and effective way to exchange spatial reference information through the use of text files. If you plan to work with vertical coordinate systems, use the ISpatialReferenceFactory3 versions of these methods.