What is on the Internet?

Mapping Web Sites.
I was going to put here map web sites, but since walking across the moors with a map is quite a specialised subject for web companies, there arn't so many web pages, but driving about the countryside isn't such a specialised occupation, millions of people get lost driving so there are lots of web sites. Here are some of them.

Multimap. Apparently the king of mapping sites. Lets you see maps of the country from 1:25000 up to 1:1250000 or there abouts. You can overlay aerial photos onto the maps or look at the photos. I like it

Streetmap. Just maps of the country, a year younger than multimap. Lots of maps, good A-Z like facilities

Viamichelin. Covers the whole of Europe for your wandering trips to France or Belgium. Has street maps. Best if you are visiting foreign places to look at it before you go, you never know when you will get lost and the chances of finding an internet cafe in The AA. They do a car route planning service that is good

The RAC do the same as the AA for a route planning service, and try Google maps as well

I am including these car route planning services because, as frightening as it may seem, you will be starting to drive yourselves about soon. Help.

Ordnance Survey. The daddy of map makers. It doesn’t have a lot of maps on the site but you can see lots of map information from the worlds best map maker. There are useful map reading exercises
Get a map. This is a site run by the ordnance survey and lets you look at small portions of ordnance survey maps and buy them online.
Old Maps. Does exactly what it says it does, lets you see old maps of an area and the corresponding modern map and aerial photo.

Arial Photos and Maps
Try looking at Multimap Arial photo section, this is an excellent way of seeing how a map actually corresponds to the ground. On your expeditions you can use this to follow your route and get an idea of the ground your walking across (see this example - Kirklevington from the air)
Try GoogleEarth - another excellent web based thing, its detail varies but it gives a sort of 3D map of the world. Of you can also go and see New York from 300ft in the air, fantastic stuff