Pocket 3D: Adding a Geoid or Custom Projection

This guide explains how to add a custom geoid or projection into Pocket 3D.

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Pocket 3D: Adding a Geoid or Custom Projection

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Adding a Geoid

  • Pocket 3D requires that geoids are in the .GFF format.
  • Geoids may be exported from MAGNET Tools to the .GFF format for use in Pocket 3D.
  • The GFF file needs to be copied to the 3DMC folder:
    • On a PC, the directory is C: > topcon > 3DMC.
    • On a data collector, the directory is My Device > TOPCON > 3DMC.
  • To select the geoid in Pocket 3D, to go Data > Control > Options.
  • In the Coords. tab you can select the geoid you wish to apply.

Adding a Projection

  • Projections can be added to Pocket3D if they are in XML format.
  • The XML file needs to be copied in the Projections folder.
    • On a PC, the directory is C: > Program Files (x86) > Topcon > Pocket-3D > CoordSys . Projections.
    • On a data collector, the directory is My Device > Program FIles > Topcon > Pocket3D > CoordSys > Projections.
  • To select the projection, go to Data > Control > Options.
  • Go to the Proj. tab and select the projection you want.