IMapContext Interface

Provides access to the context in which geometric effects and marker placements work.

Product Availability

Members

	Name	Description
	FromGeographyToMap	Converts geographic geometry to map context geometry.
	FromMapToGeography	Converts map context geometry to geographic geometry.
	FromPoints	Converts a distance expressed in points into a geographic distance.
	Init	Initializes the map context.
	InitFromDisplay	Initializes the map context using a display transformation.
	ReferenceScale	The reference scale of the map.
	SpatialReference	The spatial reference of the map.
	ToPoints	Converts a geographic distance into a distance expressed in points.

Classes that implement IMapContext

Remarks

Spatial Reference and Reference Scale information is used to define a Map Context.

A Feature Representation has to be initiated with a map context to make itself valid.

'How to initialize mapcontext
Dim pMapContext As IMapContext
Dim pGFClass As IGeoDataset
Set pMapContext = New MapContext
Set pGFClass = pFClass
pMapContext.Init pGFClass.SpatialReference, 25000, pGFClass.Extent
Set pRepresentation = pRepClass.GetRepresentation(pFeat, pMapContext)
'where pFeat is reference to a Feature object and pFClass is reference to a FeatureClass object

  'How to Initialize a mapcontext using the DisplayTransformation 
  Dim pMC As IMapContext
  Set pMC = New MapContext
  Dim pDisp As IDisplayTransformation
  Dim pAV as IActiveView
  Set pAV = pMxDoc.ActiveView
  Set pDisp = pAV.ScreenDisplay.DisplayTransformation
  pMC.InitFromDisplay pDisp