OK. I'm lost. When I try the state file it shows an input coordinate system of Artic98. I tried looking at the metadata but can't see (quickly) what system these files should be in.
I've been looking at the Metadata. It looks like it's a NAD27 projection. But Im not sure which one. It looks to be State Wide and none of the State Plane systems listed in Civil 3D are state wide. If someone who's familiar with them takes a look it might solve your problem.
I just found out that the PA Department of Conservation and Natural Resources has its own datum that it creates all it's information in... I hate government agencies. Any way, I was provided the below coordinate information and told that I needed to create a new datum in Civil 3D to be able in inset that data properly. Since I don't know how to do that I am back here. How do I create a coordinate system in Civil 3D using this information?
Projection type: Lambert Conformal Conic
Datum: NAD 1927
Spheroid: Clark 1866
Central meridian: -78°
First standard parallel: 33°
Second standard parallel: 45°
Latitude of origin: 0°
Since this is above my current training, THANK YOU in advance for any help.
Hit the create button next to the assign button on the coordinate system panel on the ribbon. Simply start filling the values in giving it a name that makes sense to you. It then shows up in the list when you assign the coordinate system.
PA Department of Conservation and Natural Resources has its own datum
It's hard to believe that US government uses a non-conventional EPSG, sir...
Anyway, I advice you to:
1] do everything in your standard PA83-NF
2] from time to time, export your vectors to Google Earth, in order to check the alignment on the physical planet (command _PUBLISHKML)
3] when everything fits, finally convert all to their odd CRS.
And if you still are lost with Martins reply, here's a link to Sinc's helpful tip on it.
That is a very helpful video, but unfortunately I do not understand the language of coordinate systems. In the video he shows how to create a Lambert Conformal Conic, single standard parallel; from the information I was provided it looks like I might have a double standard parallel, but I have no Idea. I also cannot figure out where the central meridian goes.
I'm not saying this is the correct way to do things. But you're working with state wide data, much of which comes form scanned maps.
You could always cheat. You have the state border in both systems. Move, Rotate and Scale may get you a close enough fit. You wouldn't want to do it this way if you'll have to do it more than once or twice.
Only you can judge if this is appropriate for your project. I'm just going by what I've seen of it.
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