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There is a global latitude and longitude grid data available at 1 degree resolution and higher (http://www.arcgis.com/home/item.html?id=f11bcdc5d484400fa926dcce68de3df7). Is anyone aware of a finer resolution dataset (at 0.25 and 0.5 degree)? Or alternatively a way to make it in ArcGIS/GDAL/Python using the 1 degree product?

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Can the Fishet Tool not accomplish this? I don't have an ArcInfo license here, but give a look. –  Dan Patterson Nov 13 '12 at 23:25
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up vote 2 down vote accepted

As @Dan Patterson says Create Fishnet is the ArcGIS way to go - and, at least at 10.1, it seems to be available at all license levels.

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You can create 1 degree or 30 minute grids in the ArcGIS Data Frame Properties, as follows:

  1. Right click your Data Frame in the TOC > Properties > Grids
  2. Select New Grid
  3. In the second window of the Grid and Graticule wizard, choose 1 degree for both the parallel and meridian sections. Alternatively, choose 30 minutes (i.e. for 0.5 degree).

You can also convert your grid to graphics within the Dataframe Properties > Grids window.

enter image description here

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Other alternatives is to us XTools or ETGeoWizards. Both have a tool for making polygon and line grids at a user specified distance (ie: 0.25 or 0.5 degrees).

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