Surface from polygon from TIN

FabriceCEBRON — Fri, 04 Nov 2011 22:35:18 GMT

Hi everobdy....

I have a TIN and a featureClass of polygons.

I want to create a elevation-surface law to describe each polygon.

For each polygon, I do this :

Dim pTinAdvanced As ITinAdvanced = pTin
Dim pEnumTinTriangle As IEnumTinTriangle = pTinAdvanced.MakeTriangleEnumerator(monCasier.Shape.Envelope, esriTinQualification.esriTinInsideDataArea, Nothing)

Dim pTinSurface As ITinSurface = pTin
Dim masurface2D As Double
pTinSurface.GetPartialVolumeAndArea(CType(maCote, Double), esriPlaneReferenceType.esriPlaneReferenceBelow, pEnumTinTriangle, pProjectedArea:=masurface2D)

However, the calculation is done on the envelopp of the polygon and not on the real shape !!!

How can I do the calculation on the real shape of the polygon and not on this envelopp ?

Thanks

topic Surface from polygon from TIN in ArcObjects SDK Questions

Surface from polygon from TIN