The Swedish Maritime Administration publishes the popular Batsportkort packs of charts for yachtsmen in Sweden, as well as more traditional large shipping charts, There are 6 coastal packs and 4 inland packs covering the most popular areas and they dovetail with the NV packs in southern Sweden. The packs are good value, with some providing over 40 charts for less than £50. They are clear and easy to read, in International format and with an English key. Archipelago routes are clearly marked, with the more interesting being the restricted draft 'dotted' ones. The charts are not waterproof, and locals often keep them in plastic folders which are widely available. The more recent ones now seem to be provided in a smaller, wire-bound book format. The charts are also available in electronic BSB format.
Generally the charts are at 1:50000 with some archipelago charts at 1:25000. They are available from a wide range of chandlers and bookshops, although many stock only their local area ones. The entire range is available from Nautiska Forlarget in Stockholm, from Kartbutikken.com, from Nautisk Forlag and from John Nurimen.
To get into the Nature Harbours and the outer islands the Batsportkort charts are not really enough, and you will need something extra, either the chartlets in the harbour guides, or the Hydrographica ones.
Hydrographica is a relatively new company that has recently started selling high resolution charts of the Stockholm archipelago. This has opened up whole new areas for the locals to explore (on the Batsport charts the areas look unnavigable). One of the people behind Hydrographica is Lars Granath, who also provides the excellent nature harbour chartlets in the Nautiska books (e.g. Arholma-Landsort).
The charts are available in paper or CD-Rom (BSB) form, and cover popular parts of the archipelago in high resolution (1:10,000). The charts are highly thought of in Sweden, where no real equivalent exists. Unfortunately, the company only produces a few new charts every year, so it'll take a long time to cover everywhere! A map showing the coverage is on their website. The charts are available in increasing numbers of shops, including Nautiska Forlaget and some Watskis, and also direct from the company.
For the Gota and Trollhattan Canals, although the Swedes publish a book, we think the one from NV (NV8) is better. Read our review here.