ISpatialReferenceFactory3 Interface

Provides access to members that create vertical datums or coordinate systems.

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When To Use

ISpatialReferenceFactory3 provides methods for vertical coordinate system support and convert existing low precision spatial references to a high precision spatial reference (or vice-versa).

Members

	All Properties Methods Inherited Non-inherited	Description
	ConstructHighPrecisionSpatialReference	Constructs a high precision spatial reference based on an existing spatial reference. xy/z/mDoubler is the number of times the respective precision is to be doubled. A value of zero will find the maximum doubling for that precision.
	ConstructLowPrecisionSpatialReference	Construct a low precision spatial reference with the same scale factor as the high precision input, but with a different domain extent. If the calculated domain extent cannot cover the specified data extent, an error is returned.
	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.
	CreateESRISpatialReferenceInfo	Creates a spatial reference system and defines it from the specified ESRISpatialReference buffer.
	CreateESRISpatialReferenceInfoFromPRJ	Creates a spatial reference from a PRJ string.
	CreateESRISpatialReferenceInfoFromPRJFile	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.
	CreatePredefinedGeographicTransformations	Creates a list of predefined geographic transformations.
	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.
	CreatePredefinedVerticalCoordinateSystems	Creates a list of predefined vertical coordinate systems.
	CreatePredefinedVerticalDatums	Creates a list of predefined vertical datums.
	CreatePrimeMeridian	Creates a predefined prime meridian.
	CreateProjectedCoordinateSystem	Creates a predefined projected coordinate system.
	CreateProjection	Creates a predefined projection.
	CreateSpatialReference	Creates a predefined spatial reference from an srID.
	CreateSpheroid	Creates a predefined spheroid.
	CreateUnit	Creates a predefined unit of measure.
	CreateVerticalCoordinateSystem	Creates a predefined vertical coordinate system from an enumeration or ID code.
	CreateVerticalCoordinateSystemFromESRISpatialReference	Creates a vertical coordinate system from its string format.
	CreateVerticalDatum	Creates a predefined vertical datum from an enumeration or ID code.
	ExportESRISpatialReferenceInfoToPRJFile	Exports a spatial reference to a PRJ file.
	ExportESRISpatialReferenceToPRJFile	Exports a spatial reference to a PRJ file.
	GeoTransformationDefaults	Creates a list of default geographic transformations.
	GetPredefinedGeographicTransformations	Returns a list of predefined geographic transformations.

Inherited Interfaces

CoClasses that implement ISpatialReferenceFactory3

Remarks

The ISpatialReferenceFactory3 interface has two methods that are useful when working with low and high precision spatial references. ConstructHighPrecisionSpatialReference creates a high precision spatial reference from a low precision spatial reference. Using this method will ensure that coordinate values will fit exactly into the new, denser grid mesh. Each intersection of the original grid is an intersection of the new grid. ConstructLowPrecisionSpatialReference will create a low precision spatial reference from an existing high precision one. You can require that the new resolution value be maintained, usually at the expense of the XY domain extent.