The unit needs to be comfortable in your hand, with well-spaced buttons that allow you to select functions easily. Features to look for in a handheld GPS ScreenĪ high-resolution, and preferably colour, screen is necessary if you want to use detailed topographical maps. No need to bore them with a slideshow! How much should I pay for a handheld GPS? If you've saved points of interest on your handheld GPS you can just enter these coordinates into Google Earth to show your lucky friends the places you've visited. You can even record your entire journey – creating an evolving snail-trail as you move – which you can use again in the future or to track back to your original location. Saving points of interest (or waypoints) along your journey, like a river crossing, interesting rock formation or even a hard-to-find bookstore, is easily done by pressing a button or two and can be invaluable if you re-visit the area. A handheld GPS lets you go further off the beaten track. You can pre-load maps of where you're going, but these can take up a lot of memory and they might not have all the topographic information you need. Smartphones come with inbuilt GPS, but they need to be connected to a data network in order to load map information – which isn't always realistic when you're out bush. Can't I just use my smartphone instead of a handheld GPS? Once a location or route is established, the GPS will keep track of its position and speed to give you information on where you've been and where you're headed. However, if you're in dense foliage it might take a bit longer. Under a clear sky, you can expect a handheld GPS to take just a few seconds to calculate its position. You only need a connection with three satellites to get a 2D position, with a fourth connection needed to calculate height. GPS works by collecting information from a group of satellites that constantly orbit the earth.
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