In ArcMap 10.3 I need to overlay a grid on my data sets where each cell is 1 square mile. I do not need the fishnet using geographic coordinates, just simply a grid of 1 square mile placed over the shapefiles and rasters being used.

  • What GIS software are you using? Please use the edit button beneath your question to revise it with this important detail. – PolyGeo Nov 2 '15 at 22:29
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    Are your data sets using a meter-based projected coordinate reference system? – mkennedy Nov 2 '15 at 22:41

You may not need the geographic coordinates of your fishnet but you would still use the fishnet tool to accomplish this. Start the tool and for the cell width and height you should set it to 1609.34 meters. There are several other options available so below is the helpfile for fishnet.


  • If the OP's other data is in meters, he should use meters in this tool, so 1000. – mkennedy Nov 2 '15 at 22:40
  • Good catch, you are correct! (I corrected it in the answer) – ed.hank Nov 2 '15 at 22:42
  • Ack, I guess we need to see if his data is feet- or meter-based! – mkennedy Nov 2 '15 at 22:47
  • The data sets are meter based. This should work fine. It's almost always easy once someone else points out the answer. Thanks guys – jaw485 Nov 3 '15 at 13:18

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