The scope statement is quite careful, but there are inevitably fuzzy areas. Even my Item 3 could be called a chart, and one item excluded from the samples only at the last minute, a glossy card providing information about a section of the Pembrokeshire Coast Path, could also be reasonably be construed as such. The accompanying material attached to Item 8 threatens to tip the balance and become the primary item in itself. And computerized GISystems, thankfully excluded here for the present, really need to be treated under both chapter 3 and chapter 10. When an item is catalogued as a map, even if it appears with a book attached, the map remains the chief source of information.
Most maps occur in series, or on sheets with other maps.
Item 6 is a typical series map that should probably be catalogued as a series. Most items that include several maps can probably be dealt with under a common title, or treated as if one title subsumed the others, but there are certainly cases in which no collective title can be found, in which case the option is available of cataloging each part separately. Item 2 has been handled in this way. Army Map Service. Army Map Service, 1944.