A quite useful guide if you live in or is visiting Sweden. Norway has their equivalent of this too and you’ll find that at Se eiendom.
If you like your hikes long, you will have to spend a lot of money on superfluous mapping just to cover your specific trail, and getting waterproof maps is sometimes impossible. But there is another way: if you can find a website that uses good quality maps you can simply take screenshots and print them on waterproof paper. This is a quick guide that shows you how to do it for Swedish maps.
Fjäderlätt.se is a site dedicated to lightweight backpacking and there are a bunch of interesting post there. Go check it out!