The survey area of 'Cheshire and Wirral' contains 670 tetrads. A tetrad is 2 kilometre squared.
This map shows each tetrad.
Click here for a larger map and overlay (300k)
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The survey area of 'Cheshire and Wirral' contains 670 tetrads. A tetrad is 2 kilometre squared. This map shows each tetrad.
Click here for a larger map and overlay (300k)
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Main Page | Project Purpose
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