Those standard tag names were first established in , and then updated in with the latest version of GPX, GPX 1. You can take a look at the very dry different types of information that a GPX file can have here , but there are only a few big ones that you need to know about: waypoints, routes, and tracks.
Before I show you the GPX file data for a waypoint, we need to talk about latitude and longitude. Department of Defense for GPS. You can simplistically think of it as a decimal equivalent of the latitude and longitude that you learned about in school and you convert between them with this tool. For example, a coordinate in WGS 84 is The number of decimal units to the right of the decimal point determines the accuracy of the waypoint.
This table will let you decode the decimal points in your waypoint and determine how precise it is but if the GPS is not that accurate, it can also be an incorrect GPS fix while still appearing to be precise.
But wait! They just dump all decimals from the mathematical operation in there instead of rounding up to a practical precision point such as 5 or 6 decimal places. Anything more is waste and anything less is not accurate enough.
Most consumer GPS units are accurate from feet depending on the fix. You can also spend thousands of dollars and get a professional GPS that is accurate to a few centimeters.
While the minimum information for a waypoint is latitude and longitude, you need a few more pieces of information if a waypoint is really going to be useful.
Most GPS units will allow you to additionally specify these fields:. There are a total of 19 data properties that you can add to a waypoint. Extensions are usually only read by the manufacturer who put them in. Extensions can be used with any entity in a GPX file including waypoints, tracks, and routes. And to make it even trickier, there are some extensions that are device-specific and are not documented.
The easiest way to think of a track is like a chronological breadcrumb trail of waypoints. Between each track point is simply a straight line. Generally tracks are created when you record your activity on a GPS. Some GPS units let you specify how often it should take a track point. The more track points you take, the more accurate your track and also the more you drain your battery. Most GPS units and mapping software will add optional track data tags to a track in order to make it more descriptive.
Many Garmin outdoor GPS units have two types of tracks: active and saved. And, to assure complete independence, we buy all the products we test ourselves. No cherry-picked units sent by manufacturers. No sponsored content.
No ads. Just real, honest, side-by-side testing and comparison. Our Editors independently research, test, and rate the best products. We only make money if you purchase a product through our links, and we never accept free products from manufacturers. Learn more. Geotracker and Gaia are the two worthy apps to have on your phone. Start recording the trail and continue as usual.
Suhas is the head of the Experience Coordinator's team and the Documentation Team. He has been working at Indiahikes for the past 5 years. He graduated as an engineer and corporate offices never excited him as much as the great outdoors!
Nature, adventure and wildlife are the top things that get his heart racing. He likes the opportunity to explore treks. He has done a few explorations in the Himalayas, the Western Ghats and around Bengaluru. He explored the Phulara Ridge trek, which is a much-loved trek today! Besides trekking, his interest lies in playing the guitar, learning about birds, insects, and snakes!
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