Route gives a straight line

[makiken]

Hi,
I am pretty new in GPS. I just ordered the 60CSx, which hasn't arrived yet. I have downloaded the Hawaii TOPO map from this site and started to play with it on BaseCamp (Mac) to create some routes or tracks.
And here comes my problem: When I create a route between to points on the map BC connects them with a straight line instead of following trails or roads. I am afraid auto-routing does not work with these kind of maps, does it? Do I need to buy a Garmin map for this feature?

Thank you very much for your help and sorry for double posting (I could not find this particular problem in the Search though)!

Torben

[Seldom]

Most of the maps on this site do not include routing data.

Free routable maps of the world are available here:
http://garmin.na1400.info/routable.php

But these maps have problems with address searching, and are created by volunteers from variable quality data, so I recommend a Garmin map however for mission critical routing.

[Boyd]

Garmin's 24k Hawaii Topo should give you full routing along with address search and points of interest (like restaurants, gas stations, stores, etc): https://buy.garmin.com/shop/shop.do?cID=255&pID=91281

[makiken]

Thanks, I thought so. Anyway, I tried also seldom's advice, but apparently OSX cannot mount these files. Think I'll spend the $50 for a Garmin's Map.
Aloha

[Boyd]

Garmin's map will offer a lot more features than the OSM maps. But I think you can still use the OSM maps from that site on your Mac. You would download the osm_routable_gmapsupp.zip file as described on the site and unzip it on your Mac (should happen when you double-click it).

Then just copy the gmapsupp.img file to the Garmin folder on your memory card. Unfortunately, your 60csx is an older design that only recognizes a single map file, so you would be limited to only using one tile at a time.