地形
环礁
环礁是圆形的低海拔岛屿，通常环绕着礁湖。
定义in_game/common/topography/00_default.txt:288
289color = terrain_atoll
290can_freeze_over = no
291movement_cost = 1.0
292weather_front_strength_change_percent = 0
293weather_cyclone_strength_change_percent = 0
294weather_tornado_strength_change_percent = 0
296audio_tags = {
297masDataTopologyElevation = 0
298masDataTopologyOcean = 1
299masDataTopologyCoast = 1
}
301debug_color = hsv360 {
195
70
100
}