A variant of samtregars's idea, all header lines look like they have a colon at offset 17 except the column headers which start with ' <' so

while ( <IN> )
{
    chomp;
    if ( substr( $_, 17, 1 ) eq ':' or /^ </ )
    {
        # we are in the header
    }
    else
    {
        # now we are in the data
    }
}

[download]

might work for you.

Cheers,

JohnGG

Update: Whoops, noticed that the column header lines actually start with ' <', corrected above

In reply to Re: Survey file parsing by johngg
in thread Survey file parsing by YYCseismic

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