what are the important features you must consider on buying a GPS?and what brand you could suggest? TY!;D?

Answer 1

Well with GPS more money does mean more quality. Garmin makes an excellent GPS product. First of all, you need to consider what you're looking for. Is it for street and highway navigation? If this is the case, you'll want a car-mounted unit with a large screen. But I have a feeling you're looking for a more portable unit. If you're looking for a GPS unit to be used in mapping, you're looking at spending a little more money. But if you're content with one for waypoints, routes and trails, and basic information such as direction, elevation, distance traveled and such, you can go with a more basic model.

Then you have to ask yourself if you'll be uploading data into the GPS unit (such as topographical maps). If this is the case, you will want one with removable memory, so that you can buy more or interchange disks. You'll also want to look at it's capacity to enter things such as waypoints (location markers), and probably a big issue is how accurate the unit is (it will probably say accurate within x feet in the item description). Not all GPS units can be connected to computers either, and this is important for downloading maps (which you usually have to buy) or uploading/saving data you've entered in the field. For a good, basic model I'd go with something like the Garmin etrex, but that's around $350. If you're more interested in the technology, and don't need a whole lot of advanced features then you can get a very basic model for around $100. I have a Cobra GPS 100 that I use during backpacking and hunting and it works great for what I need. It doesn't have the ability to download topographical maps or highway systems, but I usually just use it to save waypoints and route information. Hopefully this information helps you.