Eye4Software Hydromagic

  Hydrographic Survey Software

Download free demo version

How can I change a grid to use NADCON for NAD27 to NAD83 translation ?

By default, all State Plane grids that use NAD27, use a regular (Molodensky) NAD27 to NAD 83 transformation.
It is not very difficult to change the built in grid to use NADCON conversion:

Select the "Manage Map Grids..." option from "Options" => "Coordinate Systems" in the main menu

Select the grid you want to change and click the "Modify" button

In the "Select Datum" screen, select the "NAD27 (NADCON) option,
or one of the other NAD27 (NADCON) variants, and click "OK"

Tags:  State Plane Coordinate System, NAD27, NAD83, NADCON