...and then there was some ";" instead of the blank lines.

You mean like this? 

...
-0.701399;44.840355
;
RWY_protection_2;80
...

[download]

Then why not simply remove it before doing the other processing? 

    $line =~ s/^\s*;\s*$//;

[download]

In reply to Re: skip blank lines that may contain from time to time some ";" by almut
in thread skip blank lines that may contain from time to time some ";" by steph_bow

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