OK, first things first.Â Don’t do this.
Or at least don’t do this unless you really need to and know what you’re doing.Â And if you decide to proceed, you are so on your own its not funny.
Ed: He’s not kidding. It’s not easy to convey the “Are you kidding me?” look in an e-mail, but Manchester managed to do it when Mark proposed this. JW
As you may know, NEZ data for Survey Points in the Survey database cannot be edited using the C3D UI.Â Control points can be edited, but not Survey Points.Â Well, this bugged me, so I set out to determine if might be some way to do this.Â This is what I discovered.
The Survey.sdb is really a MS Access file in disguise.Â By changing the extension from .sdb to .mdb (or right-clicking and choosing Open with…and selecting Access) you can open the database.Â This db contains many tables and other foreign looking stuff.Â Open the Point:Table and you’ll see a list of all your Sruvey Points.Â If you look at the Elevation column, you see that the elevations are in meters (regardless of your drawing units).Â You can enter new elevations (in meters) and then save and close the db.Â If you changed the extension, you’ll need to change it back to .sdb.
Back in C3D, open the Survey db and click on the Survey Point collection.Â Notice your points are edited!Â You’ll need to reinsert to show the edits in the drawing.
Be careful and Enjoy!