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This document is archived and information here might be outdated. Recommended version. |
ISpatialReferenceTolerance.SetDefaultXYTolerance Method (ArcObjects .NET 10.8 SDK)
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This document is archived and information here might be outdated. Recommended version. |
Sets the default cluster tolerance used to control point coalescing in the X and Y dimensions (the equivalent of 1 mm in the current spatial reference units).
[Visual Basic .NET]
Public Sub SetDefaultXYTolerance ( _
)
[C#]
public void SetDefaultXYTolerance (
);
[C++]
HRESULT SetDefaultXYTolerance(
void
);
SetDefaultXYTolerance establishes the default value for the XY tolerance, taking into account the current units of the spatial reference. Any established tolerance will not be changed automatically if the units of the spatial reference are changed. For a ProjectedCoordinateSystem or an UnknownCoordinateSystem, the default tolerance is 1 mm (expressed in the units of the spatial reference) or 2.0 * XYResolution, whichever is larger. For a GeographicCoordinateSystem, it is the angle subtending 1 mm at the equator, or 2.0 * XYResolution, whichever is larger.
The minimum allowable XYTolerance is 2.0 * XYResolution.
If the value specified by SetDefaultXYTolerance is not greater than or equal to 2.0 * XYResolution, the XYTolerance will be set at 2.0 * XYResolution.
A file-based data source, such as shapefiles, CAD and SDC, that has an UnknownCoordinateSystem and that has an X coordinate data extent that falls between +/-400, will use a tolerance in degrees corresponding to 1mm along the equator (8.98315284119522E-09 degrees).
public void SetDefaultXYToleranceExample()
{
//The following code example creates a new projected coordinate system,
//defines the domainextent and default resolution, and sets the default XYTolerance.
// use activator class with SpatialReferenceEnvironment singleton
Type factoryType = Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
System.Object obj = Activator.CreateInstance(factoryType);
ISpatialReferenceFactory3 spatialReferenceFactory = obj as ISpatialReferenceFactory3;
ISpatialReference spatialRef = spatialReferenceFactory.CreateSpatialReference(32610);
ISpatialReference projectedCoordinateSystem = spatialReferenceFactory.CreateProjectedCoordinateSystem(32610);
IControlPrecision2 controlPrecision = projectedCoordinateSystem as IControlPrecision2;
controlPrecision.IsHighPrecision = true;
ISpatialReferenceResolution spatialReferenceResolution = projectedCoordinateSystem as ISpatialReferenceResolution;
spatialReferenceResolution.ConstructFromHorizon();
ISpatialReferenceTolerance spatialReferenceTolerance = projectedCoordinateSystem as ISpatialReferenceTolerance;
spatialReferenceTolerance.SetDefaultXYTolerance();
}
'The following code example creates a new projected coordinate system,
'defines the domain extent and default resolution, and sets the default XYTolerance.
Dim pSpatialReferenceFactory As ISpatialReferenceFactory3
pSpatialReferenceFactory = New SpatialReferenceEnvironment
Dim pSpatialReference As ISpatialReference
pSpatialReference = pSpatialReferenceFactory.CreateProjectedCoordinateSystem(32610)
Dim pControlPrecision As IControlPrecision2
pControlPrecision = pSpatialReference
pControlPrecision.IsHighPrecision = True
Dim pSRRes As ISpatialReferenceResolution
pSRRes = pSpatialReference
pSRRes.ConstructFromHorizon()
Dim pSRTolerance As ISpatialReferenceTolerance
pSRTolerance = pSpatialReference
pSRTolerance.SetDefaultXYTolerance()