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    AutoCAD Map 3D

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    *Expert Elite*
    Joe-Bouza
    Posts: 3,311
    Registered: ‎12-15-2008

    Correlate images

    147 Views, 2 Replies
    03-13-2012 08:21 AM

    I correlated several images and exported a world file. When I try to insert the images using the WF in a new drawing the first comes in at the correct location but the remaining file come in at a larger scale but seemingly at the correct location. Could it be because I did not convert to bitonal first? Or what else could it be?

    Thank you

    Joseph D. Bouza, P.E. (one of 'THOSE' People) Civil 3D 2012 & 2013
    HP Z210 Workstation
    Intel Xeon CPU E31240 @ 3.30 Hz
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    Note: Its all Resistentialism, so keep calm and carry on


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    *Expert Elite*
    Posts: 6,460
    Registered: ‎06-29-2007

    Re: Correlate images

    03-25-2012 01:45 AM in reply to: Joe-Bouza

    Hi,

     

    >> Could it be because I did not convert to bitonal first?

    No, imho it does not depend on bitonal or truecolor or whatever colordepth you are using.

    The world-file for the image specifies the "size of one pixel in x-direction" and "size of one pixel in y-direction". So I would check the resolution of the raster-file to compare the size of image in your units compared to the size of one pixel in the world-file.

    With other words: if you defined a worldfile for a raster-file having 5000x5000 pixel and you then scale the image to 10000x10000 pixel you will get it inserted in double size as long as you don't have recalculated the world-file according to the "half pixel size x and y".

     

    - alfred -

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    Ingenieur Studio HOLLAUS ... www.hollaus.at
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    *Expert Elite*
    antoniovinci
    Posts: 1,096
    Registered: ‎06-03-2011

    Re: Correlate images

    03-25-2012 04:29 AM in reply to: Joe-Bouza

    Well, given that every image must have its own world file, did you generate it with Raster Design, or what?

    Try this way, and let us know, sir.

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