Catan Map Generator

Every click draws a fresh, rule-checked island: 19 land tiles, 18 numbers, and 9 harbors along a fixed coastline — laid out so resources, numbers, and harbors follow the rules below.

// polygon class="water" points="415,0 207.5,359.4 -207.5,359.4 -415,0 -207.5,-359.4 207.5,-359.4" /> // polygon class="frame-ring" points="415,0 207.5,359.4 -207.5,359.4 -415,0 -207.5,-359.4 207.5,-359.4" /> // polygon class="frame-ring-inner-hi" points="393,0 196.5,340.35 -196.5,340.35 -393,0 -196.5,-340.35 196.5,-340.35" />

Generation filters

Toggle any rule off (strict) or on (relaxed). Changes apply the next time you generate a map.

Desert always in the center ON: the desert tile is fixed to the middle hex.
OFF: the desert can land anywhere on the island.
Allow repeated numbers next to each other ON: two neighboring tiles may share the same number.
OFF: neighboring tiles never share a number.
Allow repeated resources next to each other ON: two neighboring tiles may be the same resource.
OFF: neighboring tiles are always different resources.
Allow a resource tile next to its matching harbor ON: same tile may sit next to the same harbor.
OFF: a resource never touches its own harbor.
Allow the same number on two tiles of one resource ON: same resource tiles may both wit same numbers.
OFF: each resource type uses every number at most once.
Allow both 6 and 8 on the same resource ON: a resource type may have both a 6 and an 8 among its tiles.
OFF: each resource gets at most one of these two most-rolled numbers.