Outposts, silos and temples are not mandatory overmap specials (see occurrences
node below - first number represents minimum number of overmap special on the overmap, second number represents maximum number of overmap special per overmap), so it is possible these won’t be generated on every overmap.
{
"type" : "overmap_special",
"id" : "Strangle Temple",
"overmaps" : [
{ "point":[0,0,0], "overmap": "temple_stairs"},
{ "point":[0,0,-1], "overmap": "temple_stairs"},
{ "point":[0,0,-2], "overmap": "temple_stairs"},
{ "point":[0,0,-3], "overmap": "temple_stairs"},
{ "point":[0,0,-4], "overmap": "temple_stairs"},
{ "point":[0,0,-5], "overmap": "temple_finale"}
],
"locations" : [ "forest", "swamp" ],
"city_distance" : [20, -1],
"city_sizes" : [0, 12],
"occurrences" : [0, 3],
"rotate" : false
},
{
"type" : "overmap_special",
"id" : "Missile Silo",
"overmaps" : [
{ "point":[0,0,0], "overmap": "silo"}
],
"connections" : [
{ "point" : [0,-1,0], "terrain" : "road" }
],
"locations" : [ "wilderness", "swamp" ],
"city_distance" : [30, -1],
"city_sizes" : [4, 12],
"occurrences" : [0, 1]
},{
"type" : "overmap_special",
"id" : "Military Outpost",
"overmaps" : [
{ "point":[0,0,0], "overmap": "outpost"}
],
"locations" : [ "wilderness", "swamp" ],
"city_distance" : [4, -1],
"city_sizes" : [4, 12],
"occurrences" : [0, 10],
"rotate" : false
},