空間参照の定義(簡易)

Function fncSpatialReference(valType As Long, blnGeographic As Boolean) As ISpatialReference

'DeveloperHelpから以下を参照

'地理座標系(pcsType)
'esriSRGeoCSType Contains
'esriSRGeoCS2Type Constants
'esriSRGeoCS3Type Constants

'投影座標系(gcsType)
'esriSRProjCSType Constants
'esriSRProjCS2Type Constants
'esriSRProjCS3Type Constants
'esriSRProjCS4Type Constants

'例
valType = esriSRProjCS4Type.esriSRProjCS_JGD2000_Japan_Zone_9     'JGD2000 平面直角座標系第9系
valType = esriSRGeoCS3Type.esriSRGeoCS_JapanGeodeticDatum2000    'JGD2000 地理座標系

Dim pSpatialReferenceFactory As ISpatialReferenceFactory
Set pSpatialReferenceFactory = New SpatialReferenceEnvironment

If blnGeographic = True Then
    Dim pGeographicCoordinateSystem As IGeographicCoordinateSystem
    Set pGeographicCoordinateSystem = pSpatialReferenceFactory.CreateGeographicCoordinateSystem(valType)
    
    Set fncSpatialReference = pGeographicCoordinateSystem
    
Else
    Dim pProjectedCoordinateSystem As IProjectedCoordinateSystem
    Set pProjectedCoordinateSystem = pSpatialReferenceFactory.CreateProjectedCoordinateSystem(valType)

    Set fncSpatialReference = pProjectedCoordinateSystem
End If


'XY座標精度の設定(9.2以降は設定必須)
Dim pSpatialReferenceResolution  As ISpatialReferenceResolution
Set pSpatialReferenceResolution = fncSpatialReference
pSpatialReferenceResolution.SetDefaultXYResolution

'XY許容値の設定(9.2以降は設定必須)
Dim pSpatialReferenceTolerance  As ISpatialReferenceTolerance
Set pSpatialReferenceTolerance = fncSpatialReference
pSpatialReferenceToleranceT.SetDefaultXYTolerance
 
End Function