scan pic and scale

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
Reply to
Cudaman
Loading thread data ...
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.
Reply to
Michael Bulatovich
Well said.
Reply to
Dan S.
IMO.......using the 'Reference' option to the Scale command leaves less room for operator error. You only have one chance of transposing a number, that way.............not that I'm known for such mistakes, or anything. ;)
Reply to
TomD
I agree, that's how I do it. Quicker too.
Reply to
Huw
you can also use the ALIGN command. Works quite well for me.
"Huw" schreef in bericht news:3f6664db$ snipped-for-privacy@news.unimelb.edu.au...
Reply to
Peter O.J. Cocquyt
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.
Reply to
Huw

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.