Something like this should do it. See the docs and/or ask for anything you do not understand.

#! perl -slw use strict; my @grid; open my $fh, '<:raw', 'the file' or die $!; while( 1 ) { my( $recSize, $dummy, $record ); sysread( $fh, $recSize, 4 ) or last; $recSize = unpack 'N', $recSize; ##(*) sysread( $fh, $record, $recSize ) == $recSize or die "truncated record"; sysread( $fh, $dummy, 4 ) == 4 and unpack( 'N', $dummy ) == $recSize ##(*) or die "missing or invalid trailer"; ## (*) You may need V depending upon which platform your file was +created on push @grid, [ unpack 'N*', $record ]; } close $fh; ## @grid should now contain your data ## Addressable in the usual $grid[ X ][ Y ] manner. ## Though it might be $array[ Y ][ X ] ## I forget which order FORTRAN writes arrays in?

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re: reading binary files with Perl by BrowserUk
in thread reading binary files with Perl by jpk1292000

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