Hi all together,
after a long time of rest I have again reached a point were I have to
cry for help.
The main problem/wish is to have a fixed topografic bitmap which fits
my cave, so no further zooming is necessary, adjusting manually the
position is ok, but I want to have a bitmap, which fits my cave, if I
use the scale of 100 Meter/cm, so that I don't have to rezoom it again
and again.

First: Whenever I lock a bitmap, the bitmap shrinks on the screen,
where is the switch to stop that shrinking? I thought, that locking
means just zooming the bitmap with the cave, _if_ I would do so. But
it shrinks immediately, just by setting the 'Lock image to Cave' check
mark. (Version 5.07.8.29.243 of the Plot Viewer)

Second: With my cave at a scale of 100 Meter/cm I tried to prepare a
topografic bitmap, which fits. But it does not. I think, that
some/thing/one changes the DPI or whatever. What are the real
conversion figures to adapt my bitmap?
My topografic bitmap has 4000*3000 pixel at 72ppi (28,346 pixel/cm).
4000 pixel equals 5 km in nature. (At least this is what I can see in
Photoshop)
If I load it into Compass, the image size is shown (Adjust Bitmap
Background) as 4000*3000 pixel and also is shown that this equals 6699
(X) * 5024,3 (Y) Meters at a scale of 1.00. What has changed? And
locking does shrink my bitmap (not the polygon) by a certain factor.

Btw. the Image Position shows always only the indication "Ft." not
"M.", but it really changes the values to Meter or Feet.

Thanks
Guenter