ISurface.GetProfile Method

Returns a polyline with z values interpolated from the surface.

[Visual Basic .NET]
Public Sub GetProfile ( _
    ByVal pShape As IGeometry, _
    ByRef ppProfile As IGeometry, _
    [ByRef pStepSize As Object] _
)

[C#]
public void GetProfile (
    IGeometry pShape,
    ref IGeometry ppProfile,
    ref object pStepSize
);

[C++]
HRESULT GetProfile(
  IGeometry* pShape,
  IGeometry** ppProfile,
  Variant* pStepSize
);

[C++]
Parameters
pShape [in]

  pShape is a parameter of type IGeometry*
ppProfile [out]

  ppProfile is a parameter of type IGeometry**
pStepSize [in, optional]

  pStepSize is a parameter of type VARIANT*

Product Availability

Description

Takes an input polyline or polygon, interpolates heights for it from the surface, and outputs the result as 3D geometry.

The input geometry should be polyline or polygon based. Portions of the input not falling within the interpolation zone of the surface will be clipped. A Null pointer ('Nothing' in Visual Basic) is returned when the input falls entirely off the surface.

If specified, the input geometry will be densified by the stepSize. This takes place before interpolating heights from the surface. The densification ensures no two vertices are spaced more than stepSize apart. 

Notes:

• On rasters, bilinear interpolation is used.
• If the surface is a raster stepSize should be considered. Generally, the smaller the interval the more detail that gets captured (unless smaller than 1/2 cellsize), but at an increased cost in processing time and size of resulting geometry. The default stepSize for raster based surface is set equal to the cellsize.
• On TINs the method of interpolation is controlled by ITinSurface3.InterpolationMethod.
• On TINs, if the interpolation meethod is linear,ITinSurface3.ProfileWeedTolerance may be useful in preventing oversampled output.
• On TINs, if the interpolation method is linear, the stepSize argument isn't very important since the default sampling scheme of using input vertices and triangle edge intersections is sufficient to capture all surface information. With linear interpolation that occurs when stepSize less or equal 0 or is set to null. The use of stepSize is more relevant when the interpolation method is something other than linear.
• On TINs, if the interpolation method is natural neighbors, a stepSize less or equal 0 outputs input vertices and hard edge crossings only. If stepSize is null the output includes the input vertices and all triangle edge intersections.

Remarks

See Also

ISurface Interface