Ghost lines appear in TIFF file after exporting

[gerdal9707547]

I have a raster image as background layer in AI and some vector elements on top of it. After exporting this file as TIFF, I get a ghost line on top of it. Here is a close up of the white line. It's also shown on a printed canvas.

Here is my exporting setings 

 

[Monika Gause]

In order to solve this, please show the whole picture.

If we do not even know what kinds of objects interact, nobody will be able to help.

[gerdal9707547]

Here is a full picture. 

You can't see the line here because the file is big (120x80cm) and the line is only 1px wide (I guess). It's located above Greenland 

[Monika Gause]

Thank you. I assume that the background is a pixel image?

What about those coast lines? Did you use raster based effects, such as inner glow on them?

In that case the line could be a result of transparency flattening stitching

[gerdal9707547]

Everything you see is raster. Nothing in this image is vector.

[Monika Gause]

And the only things that are vector, are the text elements?

Then I would try and set the antialiasing to text optimized.

[gerdal9707547]

No. I imported a raster TIFF file to AI and then export it as TIFF file (I removed all vector elements to check if I still get the line and I get it).

[Monika Gause]

In that case it's probably an issue with the size of the TIFF.

Export this as a PDF (or save PDF compatible) and let Photoshop do the rasterization.

[Ton Frederiks]

Can you rasterize the file in Illustrator and export or unembed the result?