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If I have multiple Z values at an XY location, which Z value does Surfer use when gridding?

By default, Surfer uses the first Z value when there are multiple Z values at an XY location. This is called a duplicate. However, you have the opportunity to change how Surfer handles duplicates in the Grid Data dialog. 

  1. In the Grid Data dialog, click the Filter Data button.
  2. In the Duplicate Data section, choose the desired setting for To Keep.
  3. Click OK.
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