オーストラリアの地形・気候
https://media.istockphoto.com/photos/australia-3d-render-topographic-map-color-picture-id1019846772
http://www.yayoigaoka-seminar.com/juniorschool/syakai/tiri/81tikei/tikei.png
http://svc101.wic030v.server-web.com/sekai/school-syokai/sankoshiryo/12syakai/7/02/2-2.gif