Provides access to members that control the import/export operations components of a spatial reference system. This interface is same as IESRISpatialReferenceGEN.
Description
This interface can be used by developers who are familiar with the Projection Engine format for persisting string representations of these components. The ESRISpatialReferenceSize property returns the number of bytes required to hold the projection engine string representation of object implementing this interface. This number is guaranteed to be large enough but may be larger than needed. The number returned from ExportToESRISpatialReference is the exact number of bytes used in the buffer to hold the string. The example code, which demonstrates how to use this method, expects that a valid SpatialReference object has already been created.
The ImportFromESRISpatialReference method defines a spatial reference from its Projection Engine string representation. If you open up a PRJ file in Notepad that contains the string description of a ProjectedCoordinateSystem, you will see something like (but as a single line):
PROJCS["Test",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",
SPHEROID["WGS_1984",6378137,298.257223]],PRIMEM["Greenwich",0],
UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator"],
PARAMETER["false_easting",1000000],UNIT["Foot",0.3048]]
Members
| Name | Description | |
|---|---|---|
 |
ESRISpatialReferenceSize | The number of bytes required to hold the persistant representation of this spatial reference component. |
 |
ExportToESRISpatialReference | Exports this spatial reference component to a buffer. |
|
ImportFromESRISpatialReference | Defines this spatial reference component from the specified ESRISpatialReference buffer. |
IESRISpatialReference.ESRISpatialReferenceSize Property
The number of bytes required to hold the persistant representation of this spatial reference component.
Public ReadOnly Property ESRISpatialReferenceSize As Integer
public int ESRISpatialReferenceSize {get;}
Description
Returns the size in bytes required to hold the persistent representation of a coordinate system. A sample string representation is below (reformatted for display).
PROJCS["Porto_Santo_1936_UTM_Zone_28N", GEOGCS["GCS_Porto_Santo_1936", DATUM["D_Porto_Santo_1936", SPHEROID["International_1924",6378388,297]], PRIMEM["Greenwich",0], UNIT["Degree",0.0174532925199432955]], PROJECTION["Transverse_Mercator"], PARAMETER["False_Easting",500000], PARAMETER["False_Northing",0], PARAMETER["Central_Meridian",-15], PARAMETER["Scale_Factor",0.9996], PARAMETER["Latitude_Of_Origin",0], UNIT["Meter",1]]
IESRISpatialReference.ExportToESRISpatialReference Method
Exports this spatial reference component to a buffer.
Public Sub ExportToESRISpatialReference ( _
ByRef str As String, _
ByRef cBytesWrote As Integer _
)
public void ExportToESRISpatialReference (
ref string str,
ref int cBytesWrote
);
Description
Converts a spatial reference object into the string representation of a coordinate system. A sample string representation is below (reformatted for display).
PROJCS["Porto_Santo_1936_UTM_Zone_28N",
GEOGCS["GCS_Porto_Santo_1936",
DATUM["D_Porto_Santo_1936",
SPHEROID["International_1924",6378388,297]],
PRIMEM["Greenwich",0],
UNIT["Degree",0.0174532925199432955]],
PROJECTION["Transverse_Mercator"],
PARAMETER["False_Easting",500000],
PARAMETER["False_Northing",0],
PARAMETER["Central_Meridian",-15],
PARAMETER["Scale_Factor",0.9996],
PARAMETER["Latitude_Of_Origin",0],
UNIT["Meter",1]]
IESRISpatialReference.ImportFromESRISpatialReference Method
Defines this spatial reference component from the specified ESRISpatialReference buffer.
Public Sub ImportFromESRISpatialReference ( _
ByVal str As String, _
ByRef cBytesRead As Integer _
)
public void ImportFromESRISpatialReference (
string str,
ref int cBytesRead
);
Description
Converts a string representation of a coordinate system into a spatial reference object. A sample string representation is below (reformatted for display).
PROJCS["Porto_Santo_1936_UTM_Zone_28N",
GEOGCS["GCS_Porto_Santo_1936",
DATUM["D_Porto_Santo_1936",
SPHEROID["International_1924",6378388,297]],
PRIMEM["Greenwich",0],
UNIT["Degree",0.0174532925199432955]],
PROJECTION["Transverse_Mercator"],
PARAMETER["False_Easting",500000],
PARAMETER["False_Northing",0],
PARAMETER["Central_Meridian",-15],
PARAMETER["Scale_Factor",0.9996],
PARAMETER["Latitude_Of_Origin",0],
UNIT["Meter",1]]
public ISpatialReference IESRISpatialReferenceExample()
{
int size = -1;
//Not Parameter keyword
//Note also the back slash around false_easting so that the double quotation marks will read correctly
string wktString = "PROJCS[\"Test\", GEOGCS[\"GCS_WGS_1984\", DATUM[\"D_WGS_1984\",SPHEROID[\"WGS_1984\", 6378137, 298.257223]], PRIMEM[\"Greenwich\", 0],UNIT[\"Degree\", 0.0174532925199433]], PROJECTION[\"Mercator\"],PARAMETER[\"false_easting\", 1000000], UNIT[\"Foot\", 0.3048]]";
//Create an ESRISpatialReference using the parameter class
IESRISpatialReference esriSpatialReferenceProjection = new ProjectedCoordinateSystemClass() as IESRISpatialReference;
esriSpatialReferenceProjection.ImportFromESRISpatialReference(wktString, out size);
//Set your parameter to the one you just created
ISpatialReference spatialReference = esriSpatialReferenceProjection as ISpatialReference;
return spatialReference;
}
Classes that implement IESRISpatialReference
| Classes | Description |
|---|---|
| AngularUnit | Creates a angular unit of measure. |
| Datum | Creates a datum. |
| GeographicCoordinateSystem | Creates a geographic coordinate system. |
| LinearUnit | Creates a linear unit of measure. |
| Parameter | Creates a parameter. |
| PrimeMeridian | Creates a prime meridian. |
| ProjectedCoordinateSystem | Creates a projected coordinate system. |
| Projection | Creates a map projection. |
| Spheroid | Creates a spheroid. |
| UnknownCoordinateSystem | Creates an unknown coordinate system. |
| VerticalCoordinateSystem | Creates a vertical coordinate system. |
| VerticalDatum | Creates a vertical datum. |
Remarks
If working with a .NET language or Java, use the IESRISpatialReferenceGEN interface.