By Michelle Rasmussen
In the imperial version of the Autodesk® Infrastructure Design Suite 2014: BIM Workflow for Roads and Highways training guide I wrote earlier this year, I had to create a custom coordinate system. This is used to translate the data to an imperial coordinate system for those using the Imperial system of units. Although the custom coordinate system is included with the dataset that comes with the training guide, I thought some of you might benefit from understanding how that coordinate system was created.
If a coordinate system has to be created and used in a file you wish to work with, you need to make sure that the coordinate system ports into the coordinate system library. However, if you do not have administrative rights on your PC, you will not be able to just port a new coordinate system into the Autodesk program coordinate system library. Instructors using this training guide should be aware of this if their classroom is set up such that students do not have admin right. If this happens to you, you have to create the coordinate system manually. Below are the steps to do this.
1. Open AutoCAD Civil 3D.
4. In the Create Coordinate System dialog box, select Create coordinate system definition. Click Next.
6. In the Specify coordinate systems page, select Create a new coordinate system from an existing coordinate system, click the select button, and select BritishNatGrid (British National Grid (ORD SURV GB)), as shown below.