I am using ArcGIS 10.1 and I would like to change the coordinate system of a layer that is already attached to a drawing so that it matches the other layers.

  • You're not going to be able to do this in-place. As Maksim says, you'll have to create a new feature class in the target coordinate system and add that to the map/drawing.
    – mkennedy
    Dec 11 '15 at 21:09

Use the Project (Data Management) tool. Input your layer, choose the coordinate system you would like it to be projected into.


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