I implemented hooks into Google's map API on crazyguyonabike, and you can also plot lines on the maps now - either manually (point by point, just click on the map) or else you can upload a GPX file of trackpoints from GPS if you have that. To get around the "sheer number of points" problem with GPX files, I filter out some points in order to reduce the total number, which also makes the line less detailed (i.e. if you zoom in then it may not appear to follow all the twists and turns faithfully). To make this more flexible, I have a "granularity" setting on the upload, where you can opt for either more points (slower to render, but more detailed) or fewer points (faster rendering, but less detail) on a sliding scale. See the Help over on crazyguyonabike if you're interested in seeing more:
If you're plotting the points manually, then one way to do this might be to use several different maps, each one zoomed into a different part of the trip. If you did this on a journal page, then you can have several maps on the one page, or split it up over multiple pages, your choice. Either way, it might allow you to give people an idea of where you went. A 6000 mile route, following all the twists and turns of roads, that will have a *lot* of points to plot on one single map - probably much better to split it up over multiple maps for different portions of the route.
Having said all that, you could of course also make a single "overview" map which has a route line that isn't even trying to follow the roads, but simply connects the different places where you stopped for the night. That probably comes to a hundred or more points by itself, and if the route is over the USA (for example) then all those points strung together will look pretty ok when you're zoomed out to view the whole country.
Last edited by NeilGunton; 09-24-08 at 01:29 PM.