diff --git a/docs/landscape.html b/docs/landscape.html
--- a/docs/landscape.html
+++ b/docs/landscape.html
@@ -454,6 +454,7 @@
      </li>
      <li>m5 bit 7 set, bit 6 set: railway depot
       <ul>
+       <li>m2: Depot index</li>
        <li>m5 bits 1..0: exit towards
         <table>
          <tr>
@@ -609,6 +610,7 @@
      <li>m5 bit 7 set, bit 6 clear: road depot
       <ul>
        <li>m1: <a href="#OwnershipInfo">owner</a> of the depot</li>
+       <li>m2: Depot index</li>
        <li>m5 bits 3..0: exit towards:
         <table>
          <tr>
@@ -952,6 +954,7 @@
    <td>
     <ul>
      <li>m1: <a href="#OwnershipInfo">owner</a> (for sea, rivers, and coasts normally <tt>11</tt>)</li>
+     <li>m2: Depot index (for depots only)</li>
      <li>m3 bits 1..0 : Water class (sea, canal or river)
      <li>m4: Random data for canal or river tiles</li>
      <li>m5: tile type: