{"action":"opened","issue":{"url":"https://api.github.com/repos/astropy/astropy/issues/4891","repository_url":"https://api.github.com/repos/astropy/astropy","labels_url":"https://api.github.com/repos/astropy/astropy/issues/4891/labels{/name}","comments_url":"https://api.github.com/repos/astropy/astropy/issues/4891/comments","events_url":"https://api.github.com/repos/astropy/astropy/issues/4891/events","html_url":"https://github.com/astropy/astropy/issues/4891","id":154702784,"number":4891,"title":"Examples of NDData in Documentation ","user":{"login":"crawfordsm","id":1107188,"avatar_url":"https://avatars.githubusercontent.com/u/1107188?v=3","gravatar_id":"","url":"https://api.github.com/users/crawfordsm","html_url":"https://github.com/crawfordsm","followers_url":"https://api.github.com/users/crawfordsm/followers","following_url":"https://api.github.com/users/crawfordsm/following{/other_user}","gists_url":"https://api.github.com/users/crawfordsm/gists{/gist_id}","starred_url":"https://api.github.com/users/crawfordsm/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/crawfordsm/subscriptions","organizations_url":"https://api.github.com/users/crawfordsm/orgs","repos_url":"https://api.github.com/users/crawfordsm/repos","events_url":"https://api.github.com/users/crawfordsm/events{/privacy}","received_events_url":"https://api.github.com/users/crawfordsm/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-05-13T12:41:28Z","updated_at":"2016-05-13T12:41:28Z","closed_at":null,"body":"As mentioned in  #4799, it would be useful to have examples of where and how NDData is used even if those examples are links  to affiliated packages. This includes, for example, how readers/writers can be created and how masks or uncertainties are handled. \r\n\r\nSome places where it is used includes `ccdrpoc.CCDData`, `specutils.Spectrum1D`, `sunpy.GenericMap`, and `SpectralCube.SpectralCube`. "}}