GPS maps and mapping software suitable for navigation

GPS systems do not work by magic, even if it might seem so at times. In fact, each one contains special GPS maps controlled by mapping software which allows it to match the global position of the unit, in real time, against a map of the vicinity in which it finds itself. As you might expect, there are a few sources if you need GPS maps or mapping software for the purpose of navigation, not all of them free, and not all of them reliable. Therefore it pays to be careful in making the right choices when it comes to navigation.

The first source is your old map cupboard. With the right software, you can create GPS maps from a real one. This will involve scanning the mapping software into your computer, and using an appropriate software package to convert the picture into a series of co-ordinates, heights and other information needed to build a digital version for navigation.

If you do not have a scanner, or a suitable map, then you will have to purchase GPS maps for navigation with your particular brand of GPS receiver. Prices will vary according to the base map used, and the amount of information or mapping software that the supplier has put on the digital map.

For example, GPS maps designed for use with urban and highway navigation systems, including cities, roads, and other features will be comparatively expensive when put alongside those which have only the key geographic features – heights, rivers and lakes. So it all depends on the content in the mapping software.

This may be enough for the hiker or climber, after all they will not need GPS maps with every possible detail for navigation, and so can opt for the freely available, or cheaper variety. Usually this is not an option available to owners of vehicle based GPS systems, such as aviation, maritime or highway vehicles, who will need to buy the mapping software from their GPS manufacturer.
 

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