They provide a means of representing spatial information in an accurate and compact way. For example, a map can show how many rivers there are, their locations, if there are many in one area and few in another, which directions they flow, if they flow near mountains, forests or villages, etc. Many words would be needed to convey the same information and the description would still remain incomplete. Maps provide a simple, efficient way of recording and presenting spatial information collected in the field . For example, the distributions of species or habitats, or the locations of trail systems, logged areas, or villages may be presented most effectively using maps.
Maps allow someone to locate features in a new area .
An accurate map enables someone to walk into an area where he or she hasn't been before and find a feature drawn on the map, such as a proposed transect line, or a salt lick or clearing. When carefully interpreted, a map can allow someone to estimate how long it will take to get to a particular spot, and what the best route for walking there might be. Hence, you can use maps to navigate to and from areas of interest which cannot be accessed by road or river. All maps should clearly indicate orientation and scale. Furthermore, all symbols should be defined, and the map should be dated.