AutoCAD Map 3D General Discussion

AutoCAD Map 3D General Discussion

Distinguished Contributor
Posts: 106
Registered: ‎04-27-2012
Message 1 of 2 (249 Views)

Incorrect ECW coordinates

249 Views, 1 Replies
09-04-2012 12:42 PM

I've created same topic in Civil 3D, but I think here I'll an answer faster.


I have GeoPDF that I can't attach properly to drawing in Civil 3D.

So with Global Mapper I exported it to geo-referenced ECW.

I checked ECW in Global Mapper and ArcMap, everything just fine.

However when I did mapiinsert in Civil 3D, image appeared with shifted coordinates.

The original coordinate system of PDF and ECW is BC/Albers and coordinate grid is Lat/ Longs.

I've uploaded ECW, if somebody could try it.


This is a picture from Civil 3D with Lat Long grid above the image.




*Expert Elite*
Posts: 1,782
Registered: ‎06-03-2011
Message 2 of 2 (235 Views)

Re: Incorrect ECW coordinates

09-05-2012 03:39 AM in reply to: Vasily_BC

In my Map2006 CRS list, there is no BC Albers, so I created it by scratch basing on EPSG:3005 parameters (command _ADEDEFCRDSYS).

If I load your .ECW in this brand new CRS, and I draw a draft yellow line on the West coast, it fits exactly on Google Earth - check my .ZIP one, unpacking the content in the .ECW folder.

Now you should try to attach my DWG into a LL84 empty drawing (EPSG:4326) by means of _ADEDRAWINGS, then perform a draw query to check the conversion.

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