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M Tolerance (Environment setting)

Tools that honor this environment will override the default M tolerance on geodatasets created inside a geodatabase.

For a description of the default M tolerance, see the following topic: Spatial reference and geoprocessing.

Usage notes

  • For tools like Create Feature Class, Create Feature Dataset, and Create Raster Catalog, the default M tolerance for the output geodataset is 0.001 meters (1 millimeter) or its equivalent in the vertical coordinate units.
  • If the M tolerance is less than twice the output geodataset's M resolution value, an M tolerance of two times the M resolution will be used.
  • M tolerances do not persist in geodatabases of versions older than 9.2.

Dialog syntax

M ToleranceThe M tolerance to be set on the geodatasets created by geoprocessing tools. If the default M tolerance is inadequate, set this environment.

Scripting syntax

arcpy.env.MTolerance = double

ParametersExplanation

double

The M tolerance to be set on the geodatasets created by geoprocessing tools. If the default M tolerance is inadequate, set this environment.

M Tolerance syntax

Script example

import arcpy

# Set the MTolerance to 0.02
arcpy.env.MTolerance = 0.02

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