Civil 3D 2022 – Coordinate System for Local Grid Mauritius 2012

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Blog 1 of 3 in a series

Blog 2 of 3

Blog 3 of 3

When you start a project in Mauritius, and you want to use a coordinate system that is not already defined for Mauritius in Civil 3D, it is necessary to define it for yourself. If like me, the intricacies of coordinate system transformations are lost on you, then I suggest getting a surveyor with Civil 3D knowledge required. In this blog, I point to a file that was created by Dave Stoll, an Autodesk Expert Elite Member, and leave the reader to verify the file is providing the correct coordinate system (ask a surveyor to verify).

The first step is to find the definition.

Autodesk, Micrographics, Civil 3D, Custom Coordinate, Local Grid Mauritius 2012, Mauritius-ZONE

Some more in-depth information on the Mauritian coordinate system can be found in the following link:

Control Network – Mauritius

When you switch from Civil 3D to the Map 3D interface (change the workspace from Civil 3D to Planning and Analysis), you will have access to the coordinate tools.

Autodesk, Micrographics, Civil 3D, Custom Coordinate, Local Grid Mauritius 2012, Mauritius-ZONE

Now it is possible to define one’s own coordinate system definition.

Autodesk, Micrographics, Civil 3D, Custom Coordinate, Local Grid Mauritius 2012, Mauritius-ZONE

Now I used a coordinate system that was created in a file following a conversation in the Autodesk Forums. All that is required to import the definition into the Coordinate database is to open the file in Civil 3D. This database is shared between Civil 3D and Infraworks.

Mauritius_LGM-2012-2.dwg

When selecting the coordinate system, it shows up under the “Auto Registered” category and is called “Mauritius_LGM-2012”.

Autodesk, Micrographics, Civil 3D, Custom Coordinate, Local Grid Mauritius 2012, Mauritius-ZONE

In the next two blogs, we look at the limitations of this coordinate system with respect to interoperability between Infraworks and Civil 3D and investigate some workarounds.

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