Choose as appropriate from the RDA lists in sections 6.9.1.3, 3.2.1.3, and 3.3.1.3. Most commonly:
336 (content type): ‡a cartographic image ‡2 rdacontent
337 (media type): ‡a unmediated ‡2 rdamedia
338 (carrier type): ‡a sheet or ‡a volume or ‡a roll ‡2 rdacarrier