{"action":"closed","issue":{"url":"https://api.github.com/repos/mapbox/mapbox-gl-js/issues/6761","repository_url":"https://api.github.com/repos/mapbox/mapbox-gl-js","labels_url":"https://api.github.com/repos/mapbox/mapbox-gl-js/issues/6761/labels{/name}","comments_url":"https://api.github.com/repos/mapbox/mapbox-gl-js/issues/6761/comments","events_url":"https://api.github.com/repos/mapbox/mapbox-gl-js/issues/6761/events","html_url":"https://github.com/mapbox/mapbox-gl-js/issues/6761","id":327691040,"node_id":"MDU6SXNzdWUzMjc2OTEwNDA=","number":6761,"title":"Border around a set of polygon features","user":{"login":"jdeboer-geoplan","id":23341752,"node_id":"MDQ6VXNlcjIzMzQxNzUy","avatar_url":"https://avatars2.githubusercontent.com/u/23341752?v=4","gravatar_id":"","url":"https://api.github.com/users/jdeboer-geoplan","html_url":"https://github.com/jdeboer-geoplan","followers_url":"https://api.github.com/users/jdeboer-geoplan/followers","following_url":"https://api.github.com/users/jdeboer-geoplan/following{/other_user}","gists_url":"https://api.github.com/users/jdeboer-geoplan/gists{/gist_id}","starred_url":"https://api.github.com/users/jdeboer-geoplan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jdeboer-geoplan/subscriptions","organizations_url":"https://api.github.com/users/jdeboer-geoplan/orgs","repos_url":"https://api.github.com/users/jdeboer-geoplan/repos","events_url":"https://api.github.com/users/jdeboer-geoplan/events{/privacy}","received_events_url":"https://api.github.com/users/jdeboer-geoplan/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":4,"created_at":"2018-05-30T11:35:52Z","updated_at":"2018-05-31T15:21:33Z","closed_at":"2018-05-31T15:21:32Z","author_association":"NONE","body":"## Motivation\r\n\r\nIt would be very nice to be able to put a border around a group of polygons that are linked in some way.  An example would be an outline around the highlight in https://www.mapbox.com/mapbox-gl-js/example/using-box-queryrenderedfeatures/\r\nI've looked through raised issues but I don't see this there but i might well have missed it as I'd have thought it would be something people would want to do.\r\n\r\n## Design Alternatives\r\n\r\nMy current design is to go to a back end server, do a union of the underlying polygons, return that as geoJSON and draw that.\r\n\r\n## Design\r\n\r\nI'm aware that this is hard. union of polygons is slow but I see this as more not drawing the internal lines of a style which might be simpler?\r\n"}}
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