40212 - When using the editor toolbar merge command to combine overlapping/coincident features, how are unequal Z values handled?

FAQ: When using the editor toolbar merge command to combine overlapping/coincident features, how are unequal Z values handled?

Article ID:	40212
Software:	ArcGIS - ArcEditor 9.2, 9.3, 9.3.1, 10 ArcGIS - ArcInfo 9.2, 9.3, 9.3.1, 10 ArcGIS - ArcView 9.2, 9.3, 9.3.1, 10
Platforms:	Windows XP, Server 2003, Vista, Server 2008, Windows 7

Question

When using the editor toolbar merge command to combine overlapping/coincident features, how are unequal Z values handled?

Answer

If the X and Y values are the same (vertices are coincidental) but the Z values are different, the larger Z value is always used in the output vertex. See the example workflow below:

Segment 1 of overlapping line feature (note the Z values)

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