Bug/workaround for Geomap with coordinate transformation

[kevincurrey]

Ran into an issue today with the following workflow:

-Setup a new drawing with a state plane coordinate system (Drawing Settings -> Units and Zone)

-Assigned a transformation & rotation to a local coordinate system (Drawing Settings -> Transformation)

-Turn on "Online Map" from the Geolocation tab. The extends of the map are in the opposite direction of the coordinate translation, and appears be thousands of miles away. I'm working in a California State Plane Zone, and the map info was from somewhere in Canada.

Workaround: Closing and reopening the drawing seems to fix it. The online map info now shows the correct extents and is properly rotate to my local coordinate system.

Civil 3d 2017 on Windows 10

[Pointdump]

Kevin,

Details please. What State Plane System did you start with? What transformation and rotation settings did you use on the Transformation Tab? What CS was the Canadian data in and what sort of data was it? The extents of the map being in the opposite direction and thousands of miles away kinda indicates data in Lats and Longs and a CS with coordinates in the millions.

Please share your drawing, data, and screenshots.

Dave

[kevincurrey]

The following example is fictitious. Any resemblance to any actual project, real or imagined, is coincidence.

Edit: I thought the screenshots would be clickable. I hopefully I fixed them so they're at least readable.

Edit2: I said CA83-IF, and the screenshots clearly say something else. Oops. The problem was the same when I used NAD83 coordinates.

1. Start with a new CAD file, no coordinate system initially set. Set the coordinate system to CA83-IF. No transformation or rotation set yet.

2. Turn on GEOMAP. This project area is in Chico, CA. My project coordinate system will have 10000,10000. Turn off GEOMAP.

3. Setting the transformation. Before I change anything, it looks like it's already assuming some sort of lat-long conversion.

4. Final transformation settings

5. Turn GEOMAP back on. The map extents look they occupy the same coordinates, but now are pointing to Manitoba, Canada, at a skewed angle. (I had said the map extends move in my OP, that was incorrect)

6. Save, close, reopen drawing. The image is now transformed and rotated correctly.

[Pointdump]

Kevin,

The Transformation Tab does not transform anything but COGO Points. And even then all it does is allow you to list and export/import translated/rotated COGO Points. Linework and Live Maps are unaffected.

The reason Live Maps showed like that in the upper right corner is because you made a Geomarker at 10000,10000, which is WAAAAAAY outside of the limits of your California State Plane Coordinate System. The Location Panel is only for Vanilla AutoCAD. NEVER use it in Civil 3D. It is a very bad thing to do.

Dave

[kevincurrey]

>The Transformation Tab does not transform anything but COGO Points. And even then all it does is allow you to list and export/import translated/rotated COGO Points. Linework and Live Maps are unaffected.

That apparently is not true. Following a save and reopen, live maps are rotated to the local coordinate system. See my last screenshot.

>The reason Live Maps showed like that in the upper right corner is because you made a Geomarker at 10000,10000, which is WAAAAAAY outside of the limits of your California State Plane Coordinate System.

We use project specific coordinate systems for each project in my office, and usually use 10000,10000 at a major control point. The reason for using the transformation is we have some data points tied to GPS coordinates - not survey data, just related to some testing and planning. Having a transformation makes importing the data very easy, and has the major side benefit of enabling the online maps. But we don't use state plane for any kind of project control.

>The Location Panel is only for Vanilla AutoCAD. NEVER use it in Civil 3D. It is a very bad thing to do.

Thanks. I did click those buttons once to see what they do, and it was immediately clear that those dialog boxes were not what I wanted. The only thing on the geolocation tab I use is the online maps.

I really appreciate you taking the time to reply. I do still believe that this is a bug, since the online maps work as expected once I reopen the drawing. Hopefully someone else will find this useful if they come across a similar scenario.

[kevincurrey]

I just noticed screenshot 4 is the wrong one. That's what I get for posting this in a hurry at the end of the day on Friday.

Here is my actual transformation: