How Accurate Is A GPS Device?
Garmin Montana 600 Waterproof Hiking GPS
If you want to know how accurate your GPS is you should read on. GPS devices are very hot these days. They are very useful because they have a huge array of features. These devices are a great help for you whether you are trying to find the perfect restaurant or looking for driving directions. But you also need to know how accurate your GPS is before using it. This way you will know how reliable the information it provides is.
In general most GPS units on the market today are pretty accurate and, in the right condition, will guide you to within a matter of feet of your target. As with most things of course, accuracy is to a certain extent a function of the brand you buy and, if you stick to the top brands such as Garmin and TomTom, then you can be confident that your GPS unit is going to give you very accurate results.
There are of course many things that might interfere with the accuracy of your GPS. Since this is a satellite system, clouds, storms and bad weather in general may affect the accuracy of your GPS, as will cityscapes, mountains and other physical obstructions. If you buy a cheap, mass-produced GPS, the low quality of the materials might also play a part in the accuracy of the information you get. All these problems have however been greatly reduced today and accuracy is far better than it was just a few years ago.
Modern GPS devices come with a lot of tools and in-built correction systems to handle interference. Among these tools are things like multi-channel receivers, assisted GPS systems and internal calculators. Your unit might also come with the ability to lock onto its signal source and differential GPS to help it relay the information it gets.
Of course accuracy is seen by most people as being relative and there is really no difference for the average user in an accuracy of 5 feet or an accuracy of 25 feet. If you are out hiking and get lost all you really need to do is get yourself into a position such that you can see a recognizable landmark. This could mean getting to within a few yards of an object or a mile or two away from it. Similarly, if you are using your GPS to navigate as you drive then getting yourself to within a block or so of where you want to be will probably be enough for you to find your way to your destination.
For most users accuracy really is not an issue with GPS and it is only very specialist users who require the pinpoint accuracy provided by the very top-end units.