(svn r26877) -Update: documentation about the map array

2 files changed, 98 insertions, 73 deletions

diff --git a/docs/landscape.html b/docs/landscape.html
index abf01c9d8..2101ea965 100644
--- a/docs/landscape.html
+++ b/docs/landscape.html
@@ -15,20 +15,60 @@
   For a graphical representation of the tile-layout have a look at
   <a href="landscape_grid.html">Landscape grid</a> page.
  </p>
- <p>Eight attributes (counting &quot;<span style="font-weight: bold;">type_height</span>&quot;) hold the informations about a tile.<BR>
+ <p>Nine attributes (counting &quot;<span style="font-weight: bold;">type</span>&quot; and
+  &quot;<span style="font-weight: bold;">height</span>&quot;) hold the informations about a tile.<BR>
   These attributes are referred to as
-  &quot;<span style="font-weight: bold;">type_height</span>",
+  &quot;<span style="font-weight: bold;">type</span>",
+  &quot;<span style="font-weight: bold;">height</span>",
   &quot;<span style="font-weight: bold;">m1</span>&quot;, &quot;<span style="font-weight: bold;">m2</span>&quot;,
   &quot;<span style="font-weight: bold;">m3</span>&quot;, &quot;<span style="font-weight: bold;">m4</span>&quot;,
   &quot;<span style="font-weight: bold;">m5</span>&quot;, &quot;<span style="font-weight: bold;">m6</span>&quot;
   and "<span style="font-weight: bold;">m7</span>".<br>
   The most important value is the class of a tile, stored in the upper 4 bits
-  of the <span style="font-weight: bold;">type_height</span> attribute. The lower 4 bits are used to encode the height and
-  slope data.
+  of the <span style="font-weight: bold;">type</span> attribute.
  </p>
 
  Frequently repeating patterns:
  <ul>
+  <li><span style="font-weight: bold;">type</span>
+   <ul>
+    <li>
+     <a name="type"></a>
+     Bits 7..4:
+     <table border="1" style="width: 30em;">
+      <tr bgcolor="#CCCCCC"><td colspan="2">The tile type.</td></tr>
+      <tr><td style="width: 5em;"><tt>00</tt></td><td>Ground</td></tr>
+      <tr><td><tt>01</tt></td><td>Railway tracks</td></tr>
+      <tr><td><tt>02</tt></td><td>Roads</td></tr>
+      <tr><td><tt>03</tt></td><td>Town building</td></tr>
+      <tr><td><tt>04</tt></td><td>Trees</td></tr>
+      <tr><td><tt>05</tt></td><td>Station tiles</td></tr>
+      <tr><td><tt>06</tt></td><td>Water</td></tr>
+      <tr><td><tt>07</tt></td><td>Void</td></tr>
+      <tr><td><tt>08</tt></td><td>Industries</td></tr>
+      <tr><td><tt>09</tt></td><td>Tunnel / bridge</td></tr>
+      <tr><td><tt>0A</tt></td><td>Objects</td></tr>
+     </table>
+    </li>
+     Bits 3..2:
+     <table border="1" style="width: 30em;">
+      <tr bgcolor="#CCCCCC"><td colspan="2">Presence and direction of bridge above.</td></tr>
+      <tr><td style="width: 5em;"><tt>00</tt></td><td>no bridge</td></tr>
+      <tr><td><tt>01</tt></td><td>Axis X (North-East)</td></tr>
+      <tr><td><tt>02</tt></td><td>Axis Y (South-West)</td></tr>
+     </table>
+    <li>
+     <a name="tropic_zone"></a>
+     Bits 1..0:
+     <table border="1" style="width: 30em;">
+      <tr bgcolor="#CCCCCC"><td colspan="2">Only meaningfull in tropic climate. It contains the definition of the available zones</td></tr>
+      <tr><td style="width: 5em;"><tt>00</tt></td><td>normal</td></tr>
+      <tr><td><tt>01</tt></td><td>desert</td></tr>
+      <tr><td><tt>02</tt></td><td>rain forest</td></tr>
+     </table>
+     In any other climate these 2 bits are theoretically free of use, however using them does not seem useful.
+    </li>
+   </ul>
   <li><span style="font-weight: bold;">m1</span>
    <ul>
     <li>
@@ -58,32 +98,6 @@
     </li>
    </ul>
   </li>
-  <li><span style="font-weight: bold;">m6</span>
-   <ul>
-    <li>
-     <a name="bridge_direction"></a>
-     Bits 7..6:
-     <table border="1" style="width: 30em;">
-      <tr bgcolor="#CCCCCC"><td colspan="2">Presence and direction of bridge above, for tiles that support this.</td></tr>
-      <tr><td style="width: 5em;"><tt>00</tt></td><td>no bridge</td></tr>
-      <tr><td><tt>01</tt></td><td>Axis X (North-East)</td></tr>
-      <tr><td><tt>02</tt></td><td>Axis Y (South-West)</td></tr>
-     </table>
-     Some tiles, such as houses do not support bridges over them and use these bits for other purposes.
-    </li>
-    <li>
-     <a name="tropic_zone"></a>
-     Bits 1..0:
-     <table border="1" style="width: 30em;">
-      <tr bgcolor="#CCCCCC"><td colspan="2">Only meaningfull in tropic climate. It contains the definition of the available zones</td></tr>
-      <tr><td style="width: 5em;"><tt>00</tt></td><td>normal</td></tr>
-      <tr><td><tt>01</tt></td><td>desert</td></tr>
-      <tr><td><tt>02</tt></td><td>rain forest</td></tr>
-     </table>
-     In any other climate these 2 bits are theoretically free of use, however using them does not seem useful.
-    </li>
-   </ul>
-  </li>
   <li><span style="font-weight: bold;">m7:</span><br>
    Animation frame/state. Used for houses, industries, objects and stations.
   </li>
@@ -196,9 +210,7 @@
        </tr>
       </table>
      </li>
-     <li>m6 bits 7..6 : Possibility of a bridge above, in the <a href="#bridge_direction">direction specified</a></li>
      <li>m6 bits 4..2: type of hedge on NW border of the tile</li>
-     <li>m6 bits 1..0 : <a href="#tropic_zone">Tropic zone definition</a></li>
     </ul>
    </td>
   </tr>
@@ -510,8 +522,6 @@
        <li>m5 bit 4: pbs reservation state</li>
       </ul>
      </li>
-     <li>m6 bits 7..6 : Possibility of a bridge above, in the <a href="#bridge_direction">direction specified</a></li>
-     <li>m6 bits 1..0 : <a href="#tropic_zone">Tropic zone definition</a></li>
     </ul>
    </td>
   </tr>
@@ -665,8 +675,6 @@
        </li>
       </ul>
      </li>
-     <li>m6 bits 7..6 : Possibility of a bridge above, in the <a href="#bridge_direction">direction specified</a></li>
-     <li>m6 bits 1..0 : <a href="#tropic_zone">Tropic zone definition</a></li>
     </ul>
    </td>
   </tr>
@@ -713,7 +721,6 @@
          <li>bits 7..2 : lift position (for houses type 04 and 05)</li>
         </ul>
        </li>
-       <li>bits 1..0 : tropic zone specifier</li>
       </ul>
      </li>
      <li>m7 :
@@ -835,7 +842,6 @@
        </tr>
       </table>
      </li>
-     <li>m6 bits 1..0 : <a href="#tropic_zone">Tropic zone definition</a></li>
     </ul>
    </td>
   </tr>
@@ -969,7 +975,6 @@
      <li>m6 bits 5..3: the station type (rail, airport, truck, bus, oilrig, dock, buoy, waypoint)</li>
      <li>m6 bit 2: pbs reservation state for railway stations/waypoints</li>
 
-     <li>m6 bits 1..0 : <a href="#tropic_zone">Tropic zone definition</a></li>
      <li>m7 bits 4..0: <a href="#OwnershipInfo">owner</a> of road (road stops)</li>
      <li>m7 bits 7..6: present road types (road stops)</li>
      <li>m7: animation frame (railway stations/waypoints, airports)</li>
@@ -1082,8 +1087,6 @@
        </tr>
       </table>
      </li>
-     <li>m6 bits 7..6 : Possibility of a bridge above, in the <a href="#bridge_direction">direction specified</a></li>
-     <li>m6 bits 1..0 : <a href="#tropic_zone">Tropic zone definition</a></li>
     </ul>
    </td>
   </tr>
@@ -1101,7 +1104,7 @@
 
   <tr bgcolor="#CCCCCC">
    <td valign=top nowrap><strong><a name="Class8"><tt> 8</tt></a></strong></td>
-   <td><strong>Industry tile </strong></td>
+   <td><strong>Industries </strong></td>
   </tr>
   <tr>
    <td valign=top nowrap>&nbsp;</td>
@@ -1425,7 +1428,6 @@
      </li>
      <li>m6 bits 5..3: random triggers (NewGRF)</li>
      <li>m6 bit 2: bit 8 of type (see m5)</li>
-     <li>m6 bits 1..0 : <a href="#tropic_zone">Tropic zone definition</a></li>
      <li>m7: animation frame</li>
     </ul>
    </td>
@@ -1576,8 +1578,6 @@
        </tr>
       </table>
      </li>
-     <li>m6 bits 7..6 : Possibility of a bridge above, in the <a href="#bridge_direction">direction specified</a></li>
-     <li>m6 bits 1..0 : <a href="#tropic_zone">Tropic zone definition</a></li>
      <li>m7 bits 4..0: <a href="#OwnershipInfo">owner</a> of road</li>
      <li>m7 bit 5 set = on snow or desert</li>
      <li>m7 bits 7..6: present road types for road</li>
@@ -1598,8 +1598,6 @@
      <li>m2: index into the array of objects, bits 0 to 15 (upper bits in m5)</li>
      <li>m3: random bits</li>
      <li>m5: index into the array of objects, bits 16 to 23 (lower bits in m2)</li>
-     <li>m6 bits 7..6 : Possibility of a bridge above, in the <a href="#bridge_direction">direction specified</a></li>
-     <li>m6 bits 1..0 : <a href="#tropic_zone">Tropic zone definition</a></li>
      <li>m7: animation counter</li>
     </ul>
    </td>
diff --git a/docs/landscape_grid.html b/docs/landscape_grid.html
index e2f3c1f97..0e0e86e34 100644
--- a/docs/landscape_grid.html
+++ b/docs/landscape_grid.html
@@ -28,13 +28,14 @@ the array so you can quickly see what is used and what is not.
 </ul>
 <p>
 <ul>
-  <li><span style="font-weight: bold;">type_height</span> - 8 bits in size, stores tile height (lower 4 bits) and tile class (upper 4 bits)</li>
+  <li><span style="font-weight: bold;">type</span> - 8 bits in size, tile class (bits 4..7), bridge (bits 2..3) tropic zone (bits 0..1, only valid in tropic climate)</li>
+  <li><span style="font-weight: bold;">height</span> - 8 bits in size, stores tile height</li>
   <li><span style="font-weight: bold;">m1</span> - 8 bits in size, used to identify the owner of that tile (eg piece of rail, bridge, etc.)</li>
   <li><span style="font-weight: bold;">m2</span> - 16 bits in size, used to identify the index of the given tile (object) in the (object-)array</li>
   <li><span style="font-weight: bold;">m3</span> - 8 bits in size, is used for general storage</li>
   <li><span style="font-weight: bold;">m4</span> - 8 bits in size, is used for general storage</li>
   <li><span style="font-weight: bold;">m5</span> - 8 bits in size, is used for general storage</li>
-  <li><span style="font-weight: bold;">m6</span> - 8 bits in size, special meaning : lower 2 bits only valid in tropic climate, upper 2 bits for bridges</li>
+  <li><span style="font-weight: bold;">m6</span> - 8 bits in size, is used for general storage</li>
   <li><span style="font-weight: bold;">m7</span> - 8 bits in size, is used for general storage</li>
 </ul>
 
@@ -42,7 +43,8 @@ the array so you can quickly see what is used and what is not.
   <tbody>
     <tr>
       <th colspan=2>class</th>
-      <th>type_height (8)</th>
+      <th>type (8)</th>
+      <th>height (8)</th>
       <th>m1 (8)</th>
       <th>m2 (16)</th>
       <th>m3 (8)</th>
@@ -55,6 +57,7 @@ the array so you can quickly see what is used and what is not.
       <td colspan=2 class="caption">bits</td>
       <td class="bits">7654 3210</td>
       <td class="bits">7654 3210</td>
+      <td class="bits">7654 3210</td>
       <td class="bits">FEDC BA98 7654 3210</td>
       <td class="bits">7654 3210</td>
       <td class="bits">7654 3210</td>
@@ -66,69 +69,75 @@ the array so you can quickly see what is used and what is not.
       <td rowspan="2">0</td>
       <td class="caption">ground</td>
       <td class="bits">XXXX XXXX</td>
+      <td class="bits">XXXX XXXX</td>
       <td class="bits"><span class="free">OOO</span><span class="option">~ ~~~~</span></td>
       <td class="bits"><span class="free">OOOO OOOO OOOO OOOO</span></td>
       <td class="bits">XXXX <span class="free">OOOO</span></td>
       <td class="bits">XXXX XX<span class="free">OO</span></td>
       <td class="bits">XXXX XXXX</td>
-      <td class="bits">XX<span class="free">O</span>X XXXX</td>
+      <td class="bits"><span class="free">OOO</span>X XX<span class="free">OO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
     </tr>
     <tr>
       <td class="caption">farmland</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
+      <td class="bits">-inherit-</td>
       <td class="bits">XXXX XXXX XXXX XXXX</td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
-      <td class="bits">XX<span class="free">O</span>X XXXX</td>
+      <td class="bits"><span class="free">OOO</span>X XX<span class="free">OO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
     </tr>
     <tr>
       <td rowspan=3>1</td>
       <td class="caption">rail</td>
       <td class="bits">XXXX XXXX</td>
+      <td class="bits">XXXX XXXX</td>
       <td class="bits"><span class="free">OOO</span>X XXXX</td>
       <td class="bits"><span class="free">OOOO</span> XXXX <span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO</span> XXXX</td>
       <td class="bits"><span class="free">OOOO</span> XXXX</td>
       <td class="bits">XXXX XXXX</td>
-      <td class="bits">XX<span class="free">OO OO</span>XX</td>
+      <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
     </tr>
     <tr>
       <td class="caption">rail with signals</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
+      <td class="bits">-inherit-</td>
       <td class="bits"><span class="free">OOOO</span> XXXX XXXX XXXX</td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits">-inherit-</td>
-      <td class="bits">XX<span class="free">OO OO</span>XX</td>
+      <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
     </tr>
     <tr>
       <td class="caption">depot</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
+      <td class="bits">-inherit-</td>
       <td class="bits">XXXX XXXX XXXX XXXX</td>
       <td class="bits"><span class="free">OOOO</span> XXXX</td>
       <td class="bits"><span class="free">OOOO</span> XXXX</td>
       <td class="bits">XX<span class="free">O</span>X <span class="free">OO</span>XX</td>
-      <td class="bits">XX<span class="free">OO OO</span>XX</td>
+      <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
     </tr>
     <tr>
       <td rowspan=3>2</td>
       <td class="caption">road</td>
       <td class="bits">XXXX XXXX</td>
+      <td class="bits">XXXX XXXX</td>
       <td class="bits"><span class="free">OOO</span>X XXXX</td>
       <td class="bits">XXXX XXXX XXXX XXXX</td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits">XXXX XXXX</td>
-      <td class="bits">XXXX X<span class="free">O</span>XX</td>
+      <td class="bits"><span class="free">OO</span>XX X<span class="free">OOO</span></td>
       <td class="bits">XXX<span class="free">O</span> XXXX</td>
     </tr>
     <tr>
@@ -136,10 +145,11 @@ the array so you can quickly see what is used and what is not.
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
+      <td class="bits">-inherit-</td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits">-inherit-</td>
       <td class="bits">XXXX<span class="free"> OOO</span>X</td>
-      <td class="bits">XXXX X<span class="free">O</span>XX</td>
+      <td class="bits"><span class="free">OO</span>XX X<span class="free">OOO</span></td>
       <td class="bits">XXXX XXXX</td>
     </tr>
     <tr>
@@ -147,10 +157,11 @@ the array so you can quickly see what is used and what is not.
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
+      <td class="bits">-inherit-</td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits">XX<span class="free">OO OO</span>XX</td>
-      <td class="bits">XX<span class="free">OO OO</span>XX</td>
+      <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits">XXX<span class="free">O OOOO</span></td>
     </tr>
     <tr>
@@ -158,35 +169,38 @@ the array so you can quickly see what is used and what is not.
       <td class="caption">house</td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits">XXXX XXXX</td>
+      <td class="bits">XXXX XXXX</td>
       <td class="bits">XXXX XXXX XXXX XXXX</td>
       <td class="bits">XX<span class="free">O</span><span class="option">~ ~~</span>XX</td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits">XXX<span class="abuse">X XXXX</span></td>
-      <td class="bits"><span class="abuse">XXXX XX</span>XX</td>
+      <td class="bits"><span class="abuse">XXXX XX</span><span class="free">OO</span></td>
       <td class="bits">XXXX <span class="abuse">XXXX</span></td>
     </tr>
     <tr>
       <td>4</td>
       <td class="caption">trees</td>
       <td class="bits">XXXX XXXX</td>
+      <td class="bits">XXXX XXXX</td>
       <td class="bits"><span class="free">OOO</span><span class="option">~ ~~~~</span></td>
       <td class="bits"><span class="free">OOOO OOO</span>X XXXX XXXX</td>
       <td class="bits"><span class="option">~~</span>XX XXXX</td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits">XX<span class="free">OO O</span>XXX</td>
-      <td class="bits"><span class="free">OOOO OO</span>XX</td>
+      <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
     </tr>
     <tr>
       <td rowspan=7>5</td>
       <td class="caption">rail station</td>
       <td class="bits">XXXX XXXX</td>
+      <td class="bits">XXXX XXXX</td>
       <td class="bits"><span class="free">O</span>XXX XXXX</td>
       <td class="bits">XXXX XXXX XXXX XXXX</td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits">XXXX XXXX</td>
-      <td class="bits"><span class="free">OO</span>XX XXXX</td>
+      <td class="bits"><span class="free">OO</span>XX XX<span class="free">OO</span></td>
       <td class="bits">XXXX XXXX</td>
     </tr>
     <tr>
@@ -199,16 +213,18 @@ the array so you can quickly see what is used and what is not.
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
+      <td class="bits">-inherit-</td>
     </tr>
     <tr>
       <td class="caption">road stop</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
+      <td class="bits">-inherit-</td>
       <td class="bits">XXXX <span class="free">OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="option">~~~~ ~</span>XXX</td>
-      <td class="bits"><span class="free">OO</span>XX X<span class="free">O</span>XX</td>
+      <td class="bits"><span class="free">OO</span>XX X<span class="free">OOO</span></td>
       <td class="bits">XX<span class="free">O</span>X XXXX</td>
     </tr>
     <tr>
@@ -216,10 +232,11 @@ the array so you can quickly see what is used and what is not.
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
+      <td class="bits">-inherit-</td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="option">~~~~ ~</span>XXX</td>
-      <td class="bits"><span class="free">OO</span>XX X<span class="free">O</span>XX</td>
+      <td class="bits"><span class="free">OO</span>XX X<span class="free">OOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
     </tr>
     <tr>
@@ -227,10 +244,11 @@ the array so you can quickly see what is used and what is not.
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
+      <td class="bits">-inherit-</td>
       <td class="bits">XXXX <span class="free">OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits">XXXX XXXX</td>
-      <td class="bits"><span class="free">OO</span>XX X<span class="free">O</span>XX</td>
+      <td class="bits"><span class="free">OO</span>XX X<span class="free">OOO</span></td>
       <td class="bits">XXXX XXXX</td>
     </tr>
     <tr>
@@ -238,10 +256,11 @@ the array so you can quickly see what is used and what is not.
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
+      <td class="bits">-inherit-</td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="option">~~~~ ~~~~</span></td>
-      <td class="bits"><span class="free">OO</span>XX X<span class="free">O</span>XX</td>
+      <td class="bits"><span class="free">OO</span>XX X<span class="free">OOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
     </tr>
     <tr>
@@ -249,68 +268,74 @@ the array so you can quickly see what is used and what is not.
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
+      <td class="bits">-inherit-</td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="option">~~~~ ~~~~</span></td>
-      <td class="bits"><span class="free">OO</span>XX X<span class="free">O</span>XX</td>
+      <td class="bits"><span class="free">OO</span>XX X<span class="free">OOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
     </tr>
     <tr>
       <td rowspan=3>6</td>
       <td class="caption">sea, shore</td>
       <td class="bits">XXXX XXXX</td>
+      <td class="bits">XXXX XXXX</td>
       <td class="bits"><span class="free">O</span>XXX XXXX</td>
       <td class="bits"><span class="free">OOOO OOOO OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits">X<span class="option">~~</span>X XXXX</td>
-      <td class="bits">XX<span class="free">OO OO</span>XX</td>
+      <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
     </tr>
     <tr>
       <td class="caption">canal, river</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
+      <td class="bits">-inherit-</td>
       <td class="bits"><span class="free">OOOO OOOO OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits">-inherit-</td>
-      <td class="bits">XX<span class="free">OO OO</span>XX</td>
+      <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
     </tr>
     <tr>
       <td class="caption">shipdepot</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
+      <td class="bits">-inherit-</td>
       <td class="bits">XXXX XXXX XXXX XXXX</td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits">-inherit-</td>
-      <td class="bits">XX<span class="free">OO OO</span>XX</td>
+      <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
     </tr>
     <tr>
       <td>8</td>
       <td class="caption">industry</td>
       <td class="bits">XXXX XXXX</td>
+      <td class="bits">XXXX XXXX</td>
       <td class="bits">XXX<span class="free">O</span> <span class="abuse">XXXX</span></td>
       <td class="bits">XXXX XXXX XXXX XXXX</td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits">XXXX XXXX</td>
-      <td class="bits"><span class="free">OO</span>XX XXXX</td>
+      <td class="bits"><span class="free">OO</span>XX XX<span class="free">OO</span></td>
       <td class="bits">XXXX XXXX</td>
     </tr>
     <tr>
       <td rowspan=2>9</td>
       <td class="caption">tunnel entrance</td>
       <td class="bits">XXXX XXXX</td>
+      <td class="bits">XXXX XXXX</td>
       <td class="bits"><span class="free">OOO</span>X XXXX</td>
       <td class="bits"><span class="free">OOOO OOOO OOOO OOOO</span></td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits">X<span class="free">OO</span>X XXXX</td>
-      <td class="bits">XX<span class="free">OO OO</span>XX</td>
+      <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits">XXXX XXXX</td>
     </tr>
     <tr>
@@ -321,19 +346,21 @@ the array so you can quickly see what is used and what is not.
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
       <td class="bits">-inherit-</td>
-      <td class="bits">XXXX XXXX</td>
+      <td class="bits">-inherit-</td>
+      <td class="bits"><span class="free">OO</span>XX XX<span class="free">OO</span></td>
       <td class="bits">-inherit-</td>
     </tr>
     <tr>
       <td rowspan=2>A</td>
       <td class="caption">objects</td>
       <td class="bits">XXXX XXXX</td>
+      <td class="bits">XXXX XXXX</td>
       <td class="bits"><span class="free">O</span>XXX XXXX</td>
       <td class="bits">XXXX XXXX XXXX XXXX</td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits">XXXX XXXX</td>
-      <td class="bits">XX<span class="free">OO OO</span>XX</td>
+      <td class="bits"><span class="free">OOOO OOOO</span></td>
       <td class="bits">XXXX XXXX</td>
     </tr>
   </tbody>