ol-geocoder
--> https://github.com/jonataswalker/ol-geocoder
--> http://jsfiddle.net/c4qv9afb/697/
ol-popup
--> https://openlayers.org/en/latest/examples/popup.html
json格式
--> http://media.knightlab.com/StoryMapJS/demo/sochi.json
側邊欄
--> https://jsfiddle.net/q1pdgn96/2/
--> http://jsfiddle.net/V4SVt/336/
Font