--- openlayers/pdf2tiles.pl	2008/02/25 00:56:00	23
+++ openlayers/pdf2tiles.pl	2008/02/25 00:58:52	24
@@ -48,7 +48,10 @@
 my $curr_w = 256 * 2;
 my $curr_h = 256;
 
-my $start_dpi = int( 100 / ( $x_res / $curr_w ) ) - 1;
+my $x_dpi = int( 100 / ( $x_res / $curr_w ) ) - 1;	# 1 dpi margins
+my $y_dpi = int( 100 / ( $y_res / $curr_h ) );
+
+my $start_dpi = $x_dpi < $y_dpi ? $x_dpi : $y_dpi;
 
 foreach my $zoom ( 1 .. 10 ) {