A geomorphic mapboard is a game board that can be configured in different ways and reused to create different playing surfaces. The concept was introduced in PanzerBlitz

PanzerBlitz

PanzerBlitz is a tactical-scale board wargame of armoured combat set in the Eastern Front of the Second World War. The game is notable for being the first true board-based tactical-level, commercially available conflict simulation...

, though the number of configurations was low. Many tactical wargame

Tactical wargame

Tactical wargames are a type of wargame that models military conflict at a tactical level, i.e. units range from individual vehicles and squads to platoons or companies. These units are rated based on types and ranges of individual weaponry...

s use them, and they also appear in Robo Rally, Magic Realm

Magic Realm

Magic Realm is a fantasy adventure board game designed by Richard Hamblen and published by Avalon Hill in 1979. Magic Realm is more complex than many wargames and is somewhat similar to a role-playing game. It can be played solitaire or with up to 16 players and game time can last 4 hours or more...

, and occasional other games.

The mapboards are made geomorphic by using identical features along the edges of the maps, so that any two may be paired.

The concept is embraced by Advanced Squad Leader

Advanced Squad Leader

Advanced Squad Leader is a tactical-level board wargame, originally marketed by Avalon Hill Games, that simulates actions of approximately company or battalion size in World War II. It is a detailed game system for two or more players . Components include the ASL Rulebook and various games called...

(ASL), which has 60+ geomorphic mapboards . ASL increases this flexibility with the addition of "overlays" to permit further changes to the playing area.