The legend shows the colours and symbols used on the map to represent different features of the terrain. Features are represented by special symbols, vegetation markings and watercourses. The markings used for roads indicate only that some kind of road was there when the map was made. For example, a four-wheel drive track may have been graded to make an unsealed road or fire trail. Watercourses Water is very important to hikers.
Water can also be very dangerous to hikers.
It's useful know where water is in case you need to get some. Rivers and lakes will be shown as bodies of water - blue patches on the map. Other blue lines you are likely to find are broken blue lines, representing intermittent streams or dotted blue lines representing underground rivers or aque ducts. An intermittent stream is a watercourse that is usually dry, but starts to flow in heavy rain. These can be useful to you as a source of water in the wet season, or an obstacle if you're hoping to cross them.