You are right, one can trick a mapper window into a rotation, with a lot of 
proviso about which objects will be correctly rotated,
and which badly or not at all. 

I have "discovered" that also more than 9 years ago and I wrote a note on it in 
"My Bag'oTricks" at the time. It got a very wide
audience of 12.5 persons ... I discovered that it is still for sale on our site 
and I take the opportunity to tell you and all the
mapinfo-listers that all there is for sale on this site can be obtained free on 
a simple e-mail request. I will probably correct the
site soon; in the meantime, do not hesitate contacting me directly.

Jacques Paris
www.paris-pc-gis.com
for the documents see under PPCC Services and Products

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Cummings, Mike
Sent: 18 août 2006 16:13
To: MapInfo-L (E-mail)
Subject: [MI-L] Spam: Friday- fun with registering TIF images

A question arose whether a 50 year old abandoned well was plotted correctly on 
our maps.  The well file had a map showing the
location in reference to the rivers that surround it.   I thought I could 
easily register the image & determine if the well was
truly plotted incorrectly.  I realized when I opened the scanned image, that I 
forgot to rotate the image.  I decided that I could
still register the image; I just had to turn my head between the images.  I 
expected the raster image to rotate to fit the map
window; well, the map window rotated to match the orientation of the raster 
image.

I ended up with a map window where north was to the right.  At this point, I 
had determined that the well was located correctly & I
closed the raster image; I thought was that this would refresh the window and 
the window would again be north to the top.  Wrong
again, north stayed to the right.  Zoomed in, zoomed out, panned right, panned 
left-- it stayed to the right!  I created a layout
window - north to the right.  I cloned the window-north was up??

I guess, I found a way to rotate a map or layout windows.  This rotation was 
about 90 degrees.  I didn't try to find if there are
threshold limits to the rotations; but I certainly was entertained by some of 
the results.            

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