AutoCAD Map 3D General Discussion

AutoCAD Map 3D General Discussion

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sanudy2011
Posts: 19
Registered: ‎08-11-2011
Message 1 of 24 (1,772 Views)
Accepted Solution

Autocad image georeferencing

1772 Views, 23 Replies
08-16-2011 11:45 PM

I m using Autocad Map 3D 2009 version and want to know if in the latest version is there a provision of georeferencing unwarped images in Autocad Environment.

Please send a sample (DWG+image) to our support - support(at)cadstudio.cz

 

(it works fine for images geo-positioned with GeoRefImg but Map-referenced images may have other parameters)

 

Vladimir Michl, http://www.cadstudio.cz

Unfortunately we have not found a reliable solution for Map (without breaking the existing AutoCAD functionality). GeoRefImg is still supported only in plain AutoCAD and AutoCAD Architecture.

 

Vladimir Michl, http://www.cadstudio.cz  http://www.cadforum.cz

New Member
Rock_Monkey
Posts: 2
Registered: ‎07-20-2011
Message 2 of 24 (1,761 Views)

Re: Autocad image georeferencing

08-17-2011 03:06 AM in reply to: sanudy2011

Hi there I've recently been tasked with importing some geo referenced tiff images.  As far as I could find there is no built in system for what your trying to do, However you can utilise the insert X-ref command to alter the scale and point in such a way that it will effectively place and scale the image/file correctly i.e. just like it was an automated/built in geo-referance attach command.

 

Ive attached a pdf of the method for doing this.  I hope it helps in some way with what your trying to do.

Regards


Thomas Edwards

Database/CAD Manager/Geologist

Cleveland Potash Limited

Boulby Mine

Contributor
sanudy2011
Posts: 19
Registered: ‎08-11-2011
Message 3 of 24 (1,759 Views)

Re: Autocad image georeferencing

08-17-2011 03:22 AM in reply to: sanudy2011
Hi, Thomas Edward,

Thanks for the alternative suggestion. Its the basic fundamental which allows the geo tiff which can be placed in any environment. What i m looking for is the tiff could be insert manually on it tentative location in Autocad and then rubber sheet it to the exact location with help of control point as per the vector source available. After doing this the same should be saved in autocad with generating jgw file. So that it can be used by other users. Hoping to find a alternative solution for the same in Autocad.
Product Support
NateMoore
Posts: 100
Registered: ‎04-25-2008
Message 4 of 24 (1,737 Views)

Re: Autocad image georeferencing

08-17-2011 12:36 PM in reply to: sanudy2011

Map 3D by itself won't generate a world file, though Raster Design will.  However, the world file format is simple - it's just 6 lines.  WIth a little pixel measuring and careful determnation of the XY coordinates of the upper left pixel, you can piece one together: http://en.wikipedia.org/wiki/World_file 

 

As for the initial placement, download the Raster Object enabler for 2009 (autodesk.com/oe), then use the MAPIINSERT command to ballpark the insertion point.



Nate Moore, GISP
Geospatial Premium Support Specialist
Global Services
Autodesk, Sarl
*Expert Elite*
AllenJessup
Posts: 6,004
Registered: ‎05-21-2003
Message 5 of 24 (1,735 Views)

Re: Autocad image georeferencing

08-17-2011 01:29 PM in reply to: NateMoore

To perform Rubber Sheeting, as opposed to Move/Scale/Rotate, you do need Raster Design.

 

Allen

Contributor
sanudy2011
Posts: 19
Registered: ‎08-11-2011
Message 6 of 24 (1,727 Views)

Re: Autocad image georeferencing

08-17-2011 10:36 PM in reply to: sanudy2011
Hi,
Allen Jessup,

Thanks for the suggestion. We are able to rubber sheet the image in Autocad Map 3D 2009. But we are also trying to explore it in Raster Design. Hope so it would help us out. But i m hoping that we could get the required details in graphics of Autocad environment to generate its jgw file.

Thanks & Regards,
Santosh Udyavar,
Rolta India Ltd,
Mumbai.
*Expert Elite*
AllenJessup
Posts: 6,004
Registered: ‎05-21-2003
Message 7 of 24 (1,711 Views)

Re: Autocad image georeferencing

08-18-2011 04:59 AM in reply to: sanudy2011

Hello Santosh Udyavar,

 

I was not aware the the Rubber Sheet command in Map 3D worked on Raster Images. I thought it was more like a multiple point Align. I know that in Raster Design the Rubber Sheet command works specifically on images and will adjust the image pixel by pixel to give the best fit.

 

As far as the World File goes. As mentioned by others, it's not too difficult to create one manually. So if you get the results you want from the Mao 3D Rubber Sheet command and you don't have too many images to do. That might be the way to go.

 

Allen

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AllenJessup
Posts: 6,004
Registered: ‎05-21-2003
Message 8 of 24 (1,710 Views)

Re: Autocad image georeferencing

08-18-2011 05:10 AM in reply to: AllenJessup

OK. I've done a little research. It looks like the Rubber Sheet command in Map 3D will move and scale an image. But it doesn't truly rubber sheet the image. If you turn the imate in to a Block, it will also distort the X,Y aspect ratio.

 

You might want to read this disscusion; http://forums.augi.com/archive/index.php/t-16116.html

 

Allen

*Expert Elite*
antoniovinci
Posts: 1,702
Registered: ‎06-03-2011
Message 9 of 24 (1,673 Views)

Re: Autocad image georeferencing

08-22-2011 02:43 AM in reply to: AllenJessup

If you want to generate a World File from any raster, try this solution...

Contributor
sanudy2011
Posts: 19
Registered: ‎08-11-2011
Message 10 of 24 (1,655 Views)

Re: Autocad image georeferencing

08-22-2011 09:51 PM in reply to: sanudy2011
Hi,
Antoniovinci,

Thanks a lot for the lisp file provided for creating World File but we are working with Autocad Map 3D 2009 and the lisp provided does not work on it as mentioned in the txt provided with it. Although i still tried to use it and it creates the world file but when used again it does not fit in the same location. Hoping to find some lisp that would work on Autocad Map 3D 2009.

Thanks & Regards,
Santosh Udyavar,
Rolta India Ltd,
Mumbai.
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