Pocket 3D: Import/Export - Surface from a TN3 file

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A TN3 file is Topcon's proprietary file format for handling TIN surface data.

  • To import a surface, go to Data > Surface > Import/Export and choose From Surface file...
  • Find the TN3 file on your USB drive.  This will commonly be shown as the D:\ drive or USBHardDisk, depending on the style of data collector you are using.
  • Hit the OK button to import the surface file.
  • Pocket3D should show the screen at right if the surface imports successfully.
  • Importing a surface will automatically make it the active grading surface.