Mapping Hacks, forthcoming from O’Reilly, isn’t just a book of tips on everything from using mapping sites to using a GPS to building your own maps (see the table of contents), it’s also a blog. I must confess to being a bit bewildered by all the tech that’s blossoming out there at the moment — the blog content is sometimes quite opaque to me. I suppose that means I’ll have to buy the book when it comes out in a month or so.

• Buy Mapping Hacks at Amazon.com