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1. Open ArcToolbox
2. Open Data Management Tools →  Projections and Transformations → Feature → Project.  The Project dialog box will appear.
   1. Under Input Data Set or Feature Class, choose the Map Layer for which you want to change the Projection.  It can be an entirely new Map Layer or Shapefile or one that is already being used in a Map Project.
   2. Under Output Data Set or Feature Class, check to make sure that the file is being saved in the same folder as the rest of your Map and Data Layers.  If you have your data in a Geodatabase, you can save the newly projected Map Layer directly into the Geodatbase by browsing to its location.  Rename the new Map Layer so that you will recognize it and be able to distinguish it from the Map Layer you are changing.
   3. Under Output Coordinate System, click on the Properties button (looks like a sheet of paper with a pointing finger hovering over it).  The Spatial References Properties dialog box will appear. Click the Select button.  The Browse for Coordinate System dialog box will appear.
3. Choose the Projected Coordinate System folder or the Geographic Coodinate System folder, depending upon the Coordinate Systems of your other files and how you want to match them. 
   1. For assistance in chosing a Coordinate System, contact  Dr. Catherine Riihimaki at x3349 or via email.      .
   2. Choose the correct Coordinate System from the available options and appropriate region.  Once you've selected the desired Coordinate System, you'll be taken back out to the Spatial References Properties dialog box.
4.  Click the Apply button to apply the chosen Coordinate System.  Then click OK twice.

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