I want
to ask about zoom xp command. I insert 2 tiff files on a dwg file.
That 2 tiff files was surveys with different scales. 1:100 and 1:200.
Since that both surveys hasn’t coordinates before I insert it I
calibrate it in a different program so the dimensions that was
written would be measured on CAD to be similar as they should. After
I make some work on top of tiffs like polylines hatches etc… I make
a viewport with 3 areas so I can plot both tiff and the work on top
of them and my stamp. On eatch viewport I zoom and write 10xp and 5xp
where tiff were. Thought was all ok but just that time I realized
this ……. all the work that I do was fine stamps polylines etc BUT
the tiffs weren’t ok. I measured some lines with dimensions to be
certain and there waren’t correct . I measured the exact lines on
Model space and were just fine !!!!  ……….. Any help or thoughts
? Thanks on advance.Angelos

[QUOTE=aspitieris]I want
to ask about zoom xp command. I insert 2 tiff files on a dwg file.
That 2 tiff files was surveys with different scales. 1:100 and 1:200.
Since that both surveys hasn’t coordinates before I insert it I
calibrate it in a different program so the dimensions that was
written would be measured on CAD to be similar as they should. After
I make some work on top of tiffs like polylines hatches etc… I make
a viewport with 3 areas so I can plot both tiff and the work on top
of them and my stamp. On eatch viewport I zoom and write 10xp and 5xp
where tiff were. Thought was all ok but just that time I realized
this ……. all the work that I do was fine stamps polylines etc BUT
the tiffs weren’t ok. I measured some lines with dimensions to be
certain and there waren’t correct . I measured the exact lines on
Model space and were just fine !!!!  ……….. Any help or thoughts
? Thanks on advance.Angelos[/QUOTE]
I use as CAD the GstarCAD2016

Are you saying the scale of the tiffs in each viewport are off?  Does this also hold true for the linework you drop over each tiff in model space?

truebut NOT for the lines polylines etc that i draw

in MODEL SPACE everything is FINE

Are you saying that you are drawing these lines in the layout over the TIFF images that you inserted in model space?