2011

you add references to such municipal grid data files to the French grid data
catalog file, AutoCAD Map 3D will automatically use them as appropriate.
Points within the boundaries of the municipal grids will be transformed using
the local grid data, and points outside those boundaries will be transformed
using national grid data.
To set up a new grid data file for France
1 When you obtain a new grid data file, copy it into the appropriate folder
under the Autodesk shared coordinate system folder, by default
C:\Documents and Settings\All Users\Application Data\Autodesk\Geospatial
Coordinate Systems.
2 Open RgfToNtf.gdc in any text editor or word processor that can produce
an ASCII file, such as Notepad or Wordpad.
NOTE Back up GDC files before you edit them, so you can restore them to
their previous state, if necessary.
3 Edit the file to point to the name and location of your new grid data file.
4 Make other changes needed, such as rearranging or replacing grid data
files, changing the fallback datum (page 2059) definition, or adding
comments.
Grid Data Files for Australia and New Zealand
AutoCAD Map 3D comes with grid data files for Australia and New Zealand.
These files are installed in folders under the Autodesk shared coordinate system
folder, by default C:\Documents and Settings\All Users\Application
Data\Autodesk\Geospatial Coordinate Systems.
Following is a table of the grid data files and GDC files used for Australia and
New Zealand.
GDC FileGrid Data File (GSB)TransformationArea
Agd84ToGda94.gdcQLD_1299.gsbAGD84 to GDA94Australia
Agd66ToGda94.gdcvic_0799.gsbAGD66 to GDA94Victoria
Agd66ToGda94.gdctas_1098.gsbAGD66 to GDA94Tasmania
Agd66ToGda94.gdcNt_0599.gsbAGD66 to GDA94Northern Territory
Creating New Coordinate Systems | 109