diff --git a/install-chunkymap-on-ubuntu.sh b/install-chunkymap-on-ubuntu.sh
index 5019792..8019572 100644
--- a/install-chunkymap-on-ubuntu.sh
+++ b/install-chunkymap-on-ubuntu.sh
@@ -72,7 +72,7 @@ python replace-with-current-user.py  # the py file only manipulates the shell sc
 
 
 
-chmod +x  "$CHUNKYMAP_DEST/chunkymap-generator.sh"
+chmod +x "$CHUNKYMAP_DEST/chunkymap-generator.sh"
 chmod -x "$CHUNKYMAP_DEST/unused/chunkymap-regen.sh"
 chmod -x "$CHUNKYMAP_DEST/unused/chunkymap-regen-players.sh"
 chmod -x "$CHUNKYMAP_DEST/unused/chunkymap-cronjob"
diff --git a/minetestmapper-numpy.py b/minetestmapper-numpy.py
index c79623b..8d8511a 100644
--- a/minetestmapper-numpy.py
+++ b/minetestmapper-numpy.py
@@ -38,14 +38,14 @@ except:
     BytesIO = cStringIO.StringIO
 
 
-#                                                                                                                                      
+#
 # wrapper around PIL 1.1.6 Image.save to preserve PNG metadata
 #
-# public domain, Nick Galbreath                                                                                                        
-# http://blog.client9.com/2007/08/28/python-pil-and-png-metadata-take-2.html                                                                 
-#                                                                                                                                       
+# public domain, Nick Galbreath
+# http://blog.client9.com/2007/08/28/python-pil-and-png-metadata-take-2.html
+#
 def pngsave(im, file):
-    # these can be automatically added to Image.info dict                                                                              
+    # these can be automatically added to Image.info dict
     # they are not user-added metadata
     reserved = ('interlace', 'gamma', 'dpi', 'transparency', 'aspect')
 
@@ -1023,9 +1023,9 @@ def draw_image(world,uid_to_color):
 
     # worldlimits are measured in cubes of 16x16x16
     pngminx = minx*16
-    pngmaxx = maxx*16
+    pngmaxx = maxx*16+16
     pngminz = minz*16
-    pngmaxz = maxz*16
+    pngmaxz = maxz*16+16
     pngregion=[pngminx, pngmaxx, pngminz, pngmaxz]
 
     print("Saving to: "+ args.output)
diff --git a/web/chunkymap.php b/web/chunkymap.php
index f0cef3e..1ed5389 100644
--- a/web/chunkymap.php
+++ b/web/chunkymap.php
@@ -735,7 +735,7 @@ function echo_chunkymap_canvas($show_player_names_enable, $decachunks_enable, $c
 				}
 				function process_view_change() {
 					//NOTE: this should be exactly the same math as php uses to make sure there are the same #of tiles displayed as were loaded by php
-					if (current_w>current_h) {
+					if (ctx.canvas.width>ctx.canvas.height) { //if (current_w>current_h) {
 						camera_w = (800) * (1.0/zoom);
 						camera_h = camera_w/current_ratio;
 					}