IDynamicSurface.QueryAsFeatureClass Method

Writes terrain measurement points and breakline vertices to a multipoint feature class for a given area of interest and terrain pyramid level.

[Visual Basic .NET]
Public Sub QueryAsFeatureClass ( _
    ByVal pFeatureClass As IFeatureClass, _
    ByVal pAreaOfInterest As IEnvelope, _
    ByVal Resolution As Double, _
    ByVal pTrackCancel As ITrackCancel _
)

[C#]
public void QueryAsFeatureClass (
    IFeatureClass pFeatureClass,
    IEnvelope pAreaOfInterest,
    double Resolution,
    ITrackCancel pTrackCancel
);

[C++]
HRESULT QueryAsFeatureClass(
  IFeatureClass* pFeatureClass,
  IEnvelope* pAreaOfInterest,
  double Resolution,
  ITrackCancel* pTrackCancel
);

[C++]

Parameters
pFeatureClass [in]

  pFeatureClass is a parameter of type IFeatureClass
pAreaOfInterest [in]

  pAreaOfInterest is a parameter of type IEnvelope
Resolution [in]
  Resolution is a parameter of type double
pTrackCancel [in]

  pTrackCancel is a parameter of type ITrackCancel

Product Availability

Description

FeatureClass is an existing, z-aware, multipoint or point feature class that shapes will be added to. The shapes are those measurement points and breakline vertices that would be used to construct a terrain representation based on the following parameters.

AreaOfInterest (AOI) is an envelope that indicates the area of the terrain to be extracted. If a NULL is passed the entire extent is used.

Resolution is used to indicate which pyramid level to extract from. The pyramid level with a resolution (e.g. z-tolerance) that is equal to or better than the value specified will be used. For example, take a terrain that has pyramids with resolutions 1.0, 2.5, and 5.0. If you give a value of 2.5 then the 2.5 resolution pyramid level is used. If you give 2.4 then the pyramid with a resolution of 1 is used. Specify a value of -1 to obtain the terrain's overview representation.

TrackCancel is a pointer to a CancelTracker object. If you are not interested in supporting a user cancel operation then pass a NULL pointer ('Nothing' in VB).

See Also