I have two scanned images (usually tif) of maps at different
scales; a flood map (typically 1"=2000') and a parcel map of
varying scale. What I want to do is overlay them and adjust one
image up or down proportionatly to match the other image. Both images
have section lines; that will make it easy to align.
More than likely the flood map would be made transparent to look like a
watermark over the parcel map. I have to do this operation some days
20-30 times and waste TONS of paper at a copier resizing one of the
maps a few times, then using a light table draw the parcel lines over
the flood image.
I could also use this process to verify zoning over parcel maps (zoning
typically 1"=2000' township or 400' section)
I am serious, if I could find a way to do this, I would typically
save a ream of copy paper a week minimum (and copier toner to boot!).
Please help!, Thanks
If you can overlay images, I would like to know how.
But, could you put the images in model space and use overlapping
viewports in paper space?
I hardly ever work with image files. I hope to learn something here.
Roy - I thought in 13 or 14 I did this many years ago. I also used
AutoCad Map 3.0 for a little while and it may have had a way to do it.
Thanks for the response. If I do find a way I will make sure to post.
Brian - Adobe is another option I was thinking about and posted about
the same question there. Thanks for the heads up. I don't use (or
have Photoshop) so I will have to get it and try it out. Thanks again.
I've been fiddling with R14 and a couple of images. Although you have
image adjustments (brightness, contrast, fade) and a transparency
control (ON/OFF only!), I have been unable to 'see' through one image so
as to position it over the other as you want. So I gave up! :-((
I used to use a program called Cadraster LTX which I think will do what you
want. I used to superimpose scans of the original dwg with a scan of the
revised version, one in red monochrome and the other in blue monochrome, to
easily see what had been revised. I think you could vary the transparency
but I'm not sure. You used to be able to get a free trial.
In Autocad,, type "image" use the dialogue box to load the image. Insert it
into the drawing at a scale that's adequate to see. Do it again for the
second image. Then scale 1 against the other. Laying them one on the other
is tricky but you can use clip to clip an image.
Or draw the lines off the overlaid image using autocad,, then delete the
Hope this helps.