여기 포함이 맞는지 모르겠는데 사용자 ui에 대한 이벤트 연결 객체를 위해서는 layer랜더에 포함되지 않는 피쳐가 필요하다
Add properties name label or id to a feature
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https://gis.stackexchange.com/questions/239089/add-properties-name-label-or-id-to-a-feature

Seonglae Cho