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Paolo I've got many rivers (polylines ZM) with a lot of height errors in Polylines 'vertices. Vertices' Z errors are not all equal in height (i.e. they are not all at zero height). I must create a TIN using these rivers as breaklines. How can I automate this kind of correction?

CAn I use an intermediate DTM (without the contribution of my river/breaklines) to solve my problem? How?

I was thinking to use "Add Z information" and "feature to point" to transform each polyline's vertex in a point with it's Z value... then.. I would have to compare all the points with their neighboring and identify those with very large Z difference... and then, assign a medium Z value. Could it work? Some suggestions? Thanks in advance PAolo

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What software are you using? How are you defining what an error is? – TsvGis Jul 18 at 1:36
If you are using ARCGIS you could correct the errors manually which would be time consuming, or you could look at using Adjust 3D Z tool, but you will need to cut out sections (place in a new feature) with errors and then apply an adjustment value. – TsvGis Jul 18 at 1:51

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the tool Interpolate Shape (3D Analyst) could help you if you have a DEM raster to get elevation.

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THank you very much for your answer!but...the problem is that I need to correct only those vertices with wrong Z value. All the other are Ok. Is it possible to use the 'interpolate' shape tool only on some vertices? – Paolo Apr 11 '13 at 22:18

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