my $refdata = XMLin('C:/myxmltest.xml');
print ref($refdata) . "\n";			# Prints out HASH
print ref($refdata->{'Map'}) ."\n";		# Prints out ARRAY
print ref($refdata->{'Map'}[0]) . "\n";		# Prints out HASH

# But when I try ...
foreach my $href ( $refdata->{'Map'} ){
    print $href->{'MapId'} ."\n";
}