Output has M Values (Environment setting)

Tools that honor the Output has M Values environment will control whether the output geodataset will store M values.

Usage notes

• Feature vertices that do not have an M value will be assigned a value of NaN (Not a Number).
• For shapefiles, storage of M and Z values is closely connected; if the output has Z, then regardless of this environment setting, the output will also have M.

Dialog syntax

• Same as Input—If the input has M values, then the output will also have M values. If the input does not have M values, then the output will not have M values. This is the default value.
• Enabled—The output will have M values.
• Disabled—The output will not have M values.

Scripting syntax

arcpy.env.outputMFlag = output_m_flag

output_m_flag	Explanation
Same As Input	If the input has M values, then the output will also have M values. If the input does not have M values, then the output will not have M values. This is the default value.
Enabled	The output will have M values.
Disabled	The output will not have M values.

outputMFlag syntax

Script example

import arcpy

# Set the outputMFlag environment to Enabled
arcpy.env.outputMFlag = "Enabled"