English: Ground Penetrating radar depth slices of an underground structure. Plaview maps isolating specific depth are constructed from many lines of data collected at close intervals. The structure depicted is a crypt at an historic cemetery in Saint Paul, Minnesota, USA.
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{{Information |Description={{en|1=Ground Penetrating radar depth slices of an underground structure. Plaview maps isolating specific depth are constructed from many lines of data collected at close intervals. The structure depicted is a crypt at an histor