scan pic and scale

Discussion in 'AutoCAD' started by Cudaman, Sep 14, 2003.

  1. Cudaman

    Cudaman Guest

    hello all autocad users,
    I would like to scan old drawing sections into autocad and then scale them.
    Anyone have the process for this.
    The insert raster image is no problem but the scaling seems to be the
    part I'm having problems with.

    thank you
     
    Cudaman, Sep 14, 2003
    #1
  2. Cudaman

    Michael Bulatovich Guest

    Pick a known distance on the raster and the, as best you can, do a DIST on
    the two points defining it. Scale the raster
    by a factor equal to the known distance divided by the measured distance.
    Since the raster will be imprecise, you need to decide which known distance
    to use as your reference as each one will yield a slightly different scale
    factor.
     
    Michael Bulatovich, Sep 15, 2003
    #2
  3. Cudaman

    Dan S. Guest


    Well said.
     
    Dan S., Sep 15, 2003
    #3
  4. Cudaman

    Huw Guest

    I agree, that's how I do it. Quicker too.
     
    Huw, Sep 16, 2003
    #4
  5. Cudaman

    Peter O.J. Cocquyt Guest

    you can also use the ALIGN command. Works quite well for me.
     
    Peter O.J. Cocquyt, Sep 18, 2003
    #5
  6. Cudaman

    Huw Guest

    Being on Map, I actually use ADETRANSFORM quite often - it does a SCALE,
    ROTAE and MOVE using 2 source points and 2 destination points, great for
    quickly aligning images.
     
    Huw, Sep 19, 2003
    #6
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