For collection 26097, the LAPL Movie Poster collection, the isShownBy (edm:object) value can be constructed as follows:
Use: http://www.lapl.org/sites/default/files/visual-collections/movie-posters/movieposterxxx.jpg and insert the last 3 integers of the first dc:identifier in the original record: MOVIE_POSTER-000xx to the /movieposter part of the URL. For example: http://www.lapl.org/sites/default/files/visual-collections/movie-posters/movieposter018.jpg for image #18. This gets you to the higher resolution of the image. This has been added to the master spreadsheet.
See: 26097--oai:173.196.26.156:movie/17