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Simplify 3D Line not honoring M values

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03-07-2025 10:04 AM
FridjofSchmidt
Frequent Contributor

Hello community, hello Esri,

When running the Simplify 3D Line tool on an M-enabled polyline feature class, the M values get lost. Is there a way to prevent this? I tried arcpy.env.outputMFlag = "Enabled", but the tool seems to ignore it.

@Esri: Could you please implement the outputMFlag environment for this tool?

Thanks much,
Fridjof

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3 Replies
DanielFox1
Esri Contributor

Hi @FridjofSchmidt 

Have you looked in the environments tab of the tool? I done a simple test but it seemed to preserve the M-Value after running the tool.

MValue.jpg

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FridjofSchmidt
Frequent Contributor

Hi @DanielFox1 ,

You find me puzzled, because I tried this in ArcGIS Pro 3.4.2 and the M Values environment did not appear:

FridjofSchmidt_0-1741706318345.png

Also, the 3.4 documentation currently does not mention the M Values environment.

Maybe you are using a future version where this has been implemented? That would be good news.

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FridjofSchmidt
Frequent Contributor

Ah, I just saw that is a different tool... Yours is Simplify Line from Cartography Tools, but I was referring to Simplify 3D Line from 3D Analyst Tools. Simplify 3D Line does not provide the M Values environment.

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