I would like to create a fishnet (grid of 150x150m cells) for a study area (irregular shaped polygon). However, the Create Fishnet tool creates a fishnet representing the full extent of the study area (max/min long/lat) and I only need grid cells within the study area.

I can't seem to select by location (freezes) and then create layer from selected features that intersect the study area polygon. The # of grid cells is possibly too large (study area is ~440,000 km2, fishnet includes 30 million features).

Is there some other way to limit the Create Fishnet tool to only create polygon grid cells within the study area boundary?

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    Your methodology for subset is correct. Maybe you should focus on the error. Please edit the question to include the exact number of fishnet features and an indication of the complexity of the study area polygon. – Vince Nov 9 '15 at 16:48
  • Once your fishnet is up to 30m features, you should really be using raster representation, then convert to vector for individual pixels when vector modeling is required. – Vince Nov 9 '15 at 17:14
  • Thanks Vince. Do you know if there is a thread somewhere with instruction for how to convert raster to vector grid cells? – macdonaw Nov 9 '15 at 17:22
  • Raster to Polygon is the tool, but only if you've got a few non-neighboring pixels in a sea of NODATA. Otherwise you'll see the same "freeze" as ArcGIS attempts to execute the billions (or even trillions) of instructions you've requested. – Vince Nov 9 '15 at 18:19
  • But I am not sure I understand how to instruct the tool so it will convert the raster to a vector grid, and not just a vector boundary...? – macdonaw Nov 9 '15 at 18:28

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