creating new datum system in Civil 3d

[Soumya.Naik]

I'm trying to  create new datum system in civil 3d from the existing system. But in the drop down the existing coordinate system is not available. The coordinate System is already set but still not visible while creating new datum. Can anyone please guide me through this?

[rl_jackson]

Could you provide a little more detail, you're saying the coordinate system is set but you're trying to set the datum which to me means elevation. What exactly isn't visible? Is this a surface that you're referring too?

[Soumya.Naik]

file is set to this coordinate system

which is not available in this list

[rl_jackson]

If you type in the search box MGA the system will appear.

[Soumya.Naik]

Yeah tried but nothing shows up. I guess when creating datum only datum is ticked on and other options are disabled that may be the problem?

[Pointdump]

Hi Soumya,
"when creating datum only datum is ticked on and other options are disabled"
Yes.
More details please on what you're trying to do.
Dave

[Soumya.Naik]

currently I have a coordinate system assigned to file but I want to raise the Datum AHD+30.529m

[Pointdump · Accepted solution]

Soumya,
You can try the >>>Transformation Tool<<<, but keep in mind that Civil 3D cares nothing for vertical coordinate systems. If you want to raise a surface, raise the data that created the surface. (MOVE 0,0,30.529)
Dave

[Soumya.Naik]

Thanks

[lim.wendy]

Hi Sounmya,

Thank you for your post on the Civil 3D forum. It looks like Dave has provided a helpful solution regarding raising the datum in your drawing. I’ll mark his reply as the 'Answer' for this thread.

If you have any further questions or if there’s more detail you need assistance with, please provide additional information. The more specifics you provide, the better our community can assist you.

If they helped solve your issue, consider hitting the "Accept Solution" button. This helps others searching for similar problems find the answer quicker. It also lets our community know which topics are resolved and which still need attention. Plus, it's a great way to show appreciation to the person who helped you!

[teerawat.pSCHYQ]

if you tick mark on All, Project, Geographic...... then you will see after you typing MGA .....it should be like this