Z Tolerance
Release 9.3 Last modified December 17, 2008	Print all topics in : "General settings"

NOTE: This environment is only applicable to ArcGIS 9.2 or higher.

Specify the Z tolerance that will be used for processing and set to the output geodataset.

Learn more about Z tolerance.

Usage tips

• If the output is a feature class inside a feature dataset, the environment will be ignored because all feature classes inside a feature dataset must have the same Z tolerance.
  


• If the output is a stand-alone feature class, raster catalog, or feature dataset, the tolerance of the input will be used as the processing and set as the output feature class' Z tolerance. For tools that have multiple inputs (Intersect, for example), the tolerance of the first input in the list will be used as the default. To override these defaults, set the Z tolerance environment to the desired value.
  


• If the geoprocessing tool does not have an input geodataset (for example, Create Feature Class, Create Feature Dataset, and Create Raster Catalog) and if the environment is left blank, the default Z tolerance is set to 0.001 unit. To override this default, set the environment to the desired value.
  


• If the tolerance is set to Unknown units, the units are assumed to be the same as the output vertical coordinate system's units.
  


• If the Z tolerance is not at least twice as large as the Z resolution value, the Z tolerance is set to be twice as large as the Z resolution by default.
  


• Tolerance will not be persisted to a dataset in a pre-9.2 geodatabase.
  
• Learn more about specifying general settings.
  
• Learn more about environment settings.
  
• Learn more about environment levels and hierarchy.
  

Command line syntax

An overview of the command line window
ZTolerance <linear unit>

Parameters	Explanation	Data type
<Linear unit>	The tolerance for adjusting Z values during cluster processing. The default value is 10 * the Z resolution.	Linear Unit

Data types for geoprocessing tool parameters

Command line example

ZTolerance 0.02

Scripting syntax

An overview of scripting in geoprocessing

ZTolerance (Linear unit)

Parameters	Explanation	Data type
Linear Unit (Required)	The tolerance for adjusting Z values during cluster processing. The default value is 10 * the Z resolution.	Linear Unit

Data types for geoprocessing tool parameters

Script example

import arcgisscripting
gp = arcgisscripting.create()

gp.workspace = "h:/workspace"
gp.ZTolerance = "0.02"

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