landless_inspector_terrain_knowing_the_land_trigger

landless_inspector_terrain_knowing_the_land_trigger = {
	trigger_if = {
		limit = {
			OR = {
				terrain = forest
				terrain = jungle
				terrain = taiga
				terrain = wetlands
			}
		}
		landless_inspector_terrain_master_trigger = { TERRAIN = woodlands }
	}
	trigger_if = {
		limit = {
			OR = {
				terrain = mountains
				terrain = hills
				terrain = desert_mountains
			}
		}
		landless_inspector_terrain_master_trigger = { TERRAIN = highlands }
	}
	trigger_if = {
		limit = {
			OR = {
				terrain = plains
				terrain = steppe
				terrain = farmlands
				terrain = floodplains
			}
		}
		landless_inspector_terrain_master_trigger = { TERRAIN = lowlands }
	}
	trigger_if = {
		limit = {
			OR = {
				terrain = desert
				terrain = oasis
				terrain = drylands
			}
		}
		landless_inspector_terrain_master_trigger = { TERRAIN = drylands }
	}
}

As written in game/common/scripted_triggers/06_bp3_triggers.txt.