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I need to split a vector layer into 1km x 1km squares so I can carry out some calculations for these individual areas.

Is there a feature to do this?

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@user13541, What GIS applications do you have to use for your task? – artwork21 Jan 9 '13 at 15:48
up vote 7 down vote accepted

Using ArcGIS, one way to go about this is to create a 1 X 1 KM Fishnet grid followed by using the Split tool.

enter image description here

The general workflow/model looks like this:

enter image description here

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