Coordinate System - Reference Point - Local and Grid coordinates are reversed

[mariel.rd]

Hi dear Civil 3D Forum,

I know there are different ways to assign coordinate systems in civil 3D.
For my current project I have taken the most common way:

1.- Drawing Settings:
> In Toolspace, select Settings Tab
> Right-click on the DWG name
> Select Edit Drawing Settings
> Select a projection and coordinate system on the first tab of the dialog

However, I noticed that through this method, the local and grid coordinates from my
reference point are reversed.

In the following link I read about Transformation Settings:

https://knowledge.autodesk.com/support/civil-3d/learn-explore/caas/CloudHelp/cloudhelp/2018/ENU/Civi...

"The zone transformation settings do the following:
- Relate local coordinates to grid coordinates by transforming distances measured on the Earth (or geoid) to distances on an ellipsoid.
- Relate distances on the ellipsoid to the flat plane (projection) of the current zone’s grid coordinate system."

Am I right when I say:

Geographic Coordinate Systems > must be displayed in "Local Coordinates"?

Projected Coordinate Systems > must be displayed in "Grid Coordinates"?

Do I have to change that manually?

I want to link my DWG File and use shared coordinates in Revit:

https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2018/EN...

But at the moment I can not do it because of this issue.

I look forward to hearing from you.

Mariel Rivero Dapena
Intel ® Xeon ® CPU E3-1505M v5 @ 2.80GHz
64GB RAM
Intel ® HD Graphics P530, NVIDIA Quadro M2200
Windows 7 Enterprise, 64-bit / Civil 3D 2018

[Pointdump · Accepted solution]

Mariel,
Nothing happens on the Transformation Tab until you click the Transformationseinstellungen anwenden Button. You won't even need this Tab unless your Surveyor starts the Survey with arbitrary coordinates (like 5000,5000). The Transformation Tab is used to tie those arbitrary coordinates to your DHDN/3.Gauss3d-4 Projected Coordinate Reference System.

Am I right when I say:
Geographic Coordinate Systems > must be displayed in "Local Coordinates"?
Projected Coordinate Systems > must be displayed in "Grid Coordinates"?

Geographic Coordinate Systems use Degrees as units--Latitude and Longitude. Projected Coordinate Systems use Feet or Meters as units. All Projected Coordinate Systems are based on a Geographic Coordinate System.

Dave

[mariel.rd]

Thank you very much Dave for your prompt answer 👍