|}
As of IVAN 0.50.6, there are exactly 32 slots (<code>dungeonAA</code> up to <code>dungeonBF</code>) available for use as the over-world linkages to your dungeon. Simply pick one out that is free and modify it to link together with your dungeon data file by specifying which <code>DEFINED_VALUE</code> you introduced in define.dat This table shows the control variables for each over-world terrain:. You can configure your over-world terrain with the ground terrain type of your choice, and a bunch of other things besides.
{| class="wikitable"
| <code>BitmapPos</code>
| <code>x, y;</code>
| This determines the bitmap position of the picture of the terrain in <code>WTerra.pcx</code>. You can create your own picture by modifying <code>WTerra.pcx</code>.
|-
| <code>NameStem</code>
| <code>"string"</code>
| This is a string, beginning with a lowercase word, usually a noun or an adjective, for example, "mighty cathedral" or "cave entrance".
|-
| <code>UsesLongArticle</code>
| <code>true</code> or <code>false</code>
| Specify whether to prefix the name stem with the english language short article, "a", or the long article, "an".
|-
| <code>IsAbstract</code>
| <code>true</code> or <code>false</code>
| Do not worry about this. An over-world terrain has no other config than the base config and only the protoype is abstract, if that means anything.
|-
| <code>CanBeGenerated</code>
| <code>true</code> or <code>false</code>
| Set this value to true if you want your user defined dungeon to appear in the world map. It is not applicable to core locations.
|-
| <code>AttachedDungeon</code>
== A worked example ==
=== Dungeon data file ===
(Attachement)
=== In define.dat ===
=== In owterra.dat ===
== What's this about "core locations" ==
Core locations are the original ones from IVAN 0.50. These are New Attnam, Under water tunnel, Attnam and Gloomy Caves. Their generation on the world map is not handled in the generic way covered by the means of adding places to the world map described here.
== Known limitations ==