Different distance with GPS/Ultratrack - Instinct - Outdoor Recreation Archive (2024)

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gobozovover 5 years ago

Same bike ride, more than 3 miles difference in distance. First is GPS, Second is Ultratrack. Track itself looks accurate, but distance significantly different.

https://connect.garmin.com/modern/activity/3129841992
https://connect.garmin.com/modern/activity/3233801585

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  • HumnoiKoyrakover 5 years ago+1

    It's look normally. I have tested running GPS vs Ultratrack. Test result is same as you.
  • gaijinover 5 years ago+1

    Airmapper is absolutely correct. If you want a record of anything more detailed than what county you were in, then you should use either Smart or Every Second Data Recording - definitely NOT Ultratrac…
  • gaijinover 5 years ago+1

    IMHO This isn't tracking at all. It is supposed to be using the sensors apart from the GPS for dead-reckoning, and it clearly is not doing that properly. It is simply connecting the dots between GPS fixes…

All Replies

  • 0HumnoiKoyrakover 5 years ago

    It's look normally. I have tested running GPS vs Ultratrack. Test result is same as you.

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  • 0randb66over 5 years ago

    So ultratrack is measuring short or gps long? I'm guessing ultratrack short.

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  • 0LiquidSquidover 5 years ago

    Utratrack is short, and there are further problems with the speed coming in bursts, and average speed (as a result of short distance) being far too high. The track is shorter and different on the Ultratrack recording, but not enough to account for that much error.

    It is my experience with Utratrack also, it simply doesn't work as advertised. You should see how poor it is on hikes. It looks like Harold and the Purple Crayon on crack. I just stick with GPS as it works.

    It would be really nice to have Ultratrack actually function as advertised to get really long battery life out of long activities like a long 14 hour hike and still have enough left for the next day without a re-charge.

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  • 0Airmapperover 5 years ago

    It's seems to be working perfectly as intended if I understand the issue being discussed. I get the feeling the intention of Ultratrac is misunderstood. It's a battery saving feature, not an extra high precision feature. Think ultra long battery, not ultra precision. Weird I know but that's what they named it.

    Ultratrac saves battery because it's turning the GPS off, it's the only way that can work. Using the GPS uses battery at a much higher rate than just doing it's thing as a watch/HRM. If GPS stays on 100% you get much more accurate results, but you pay for that in battery consumption.

    Ultratrac is for when you want to save battery but still want an idea of where you've been, so it automatically "wakes up" the GPS periodically to grab a position and then turns it off again. It's a compromise.

    If you are on a short hike, there is no real need to save battery. An Instinct will run nearly a day in GPS on mode. Plus it's easy enough to carry along a charging cable and USB battery pack if you so desire. But, if you have a situation where you can't easily maintain charging the Instinct, say a multi day backpacking trip and you forgot your charging cable, well that feature would let you trade detail for duration.

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  • 0gaijinover 5 years ago

    Airmapper is absolutely correct. If you want a record of anything more detailed than what county you were in, then you should use either Smart or Every Second Data Recording - definitely NOT Ultratrac.

    For example, here are two short bike rides I recorded at the same time - one with Every Second Data Recording on my tactix Bravo, the other with Ultratrac Data Recording on my fenix 3:

    Every Second Data Recording
    [IMG2=JSON]{"data-align":"none","data-size":"full","height":"786","width":"1000","src":"http:\/\/i219.photobucket.com\/albums\/cc18\/gaijinnv\/GPSComptactixBravo_11JUN16_zpsb3g109eo.jpg"}[/IMG2]

    Ultratrac Data Recording
    [IMG2=JSON]{"data-align":"none","data-size":"full","src":"http:\/\/i219.photobucket.com\/albums\/cc18\/gaijinnv\/GPSCompf3_11JUN16_zpsfdzrpcig.jpg"}[/IMG2]

    Here are the two tracks overlayed with the Every Second track in BLUE and the Ultratrac track in RED:

    [IMG2=JSON]{"data-align":"none","data-size":"full","src":"http:\/\/i219.photobucket.com\/albums\/cc18\/gaijinnv\/GPSCompGE_11JUN16_zpsrmtqtfai.jpg"}[/IMG2]

    Obviously, it is not possible to record accurate Speed/Distance data using Ultratrac.

    HTH

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  • 0LiquidSquidover 5 years ago

    IMHO This isn't tracking at all. It is supposed to be using the sensors apart from the GPS for dead-reckoning, and it clearly is not doing that properly. It is simply connecting the dots between GPS fixes with straight lines, which is useless in all but moving in a straight line. No activity have I ever done except for driving in a car, is a straight line. If mileage is off by 50% or more, than it is simply not functional. It should not be called "tracking" but be called "auto-way point"

    For the record, I have the Fenix 5 and it behaves the same way.

    How it should be working is: Start be getting a good GPS fix, then shutting GPS off. Then using the non-GPS sensors to record: "I am measuring steps, and this many in this direction, estimate a fix here, this many steps in that direction, another estimated fix, get a new GPS fix after several minutes and shift.rotate all points since last GPS fix to match up." If biking, the GPS should attempt a fix at every detected change in direction, and work things a tad differently but basically the same to use GPS fixes to rotate the non GPS sensor data into position and back-calculate measured data to make it work. Lastly, if in Ultratrack, speed calculations should be smoothed and averaged between fixes, not big humps of brief speed.

    I don't think Garmin has spent any effort on getting Ultratrack to be useful since the vast majority of users are using GPS. It is rare to even see someone chime in on Ultratrack.
    The question is if it is worth trying to get working when battery life with GPS on is already acceptable? I tried Ultratrack twice, and moved on.

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  • 0gaijinover 5 years ago

    IMHO This isn't tracking at all. It is supposed to be using the sensors apart from the GPS for dead-reckoning, and it clearly is not doing that properly. It is simply connecting the dots between GPS fixes with straight lines, which is useless in all but moving in a straight line. No activity have I ever done except for driving in a car, is a straight line. If mileage is off by 50% or more, than it is simply not functional. It should not be called "tracking" but be called "auto-way point"

    For the record, I have the Fenix 5 and it behaves the same way.

    How it should be working is: Start be getting a good GPS fix, then shutting GPS off. Then using the non-GPS sensors to record: "I am measuring steps, and this many in this direction, estimate a fix here, this many steps in that direction, another estimated fix, get a new GPS fix after several minutes and shift.rotate all points since last GPS fix to match up." If biking, the GPS should attempt a fix at every detected change in direction, and work things a tad differently but basically the same to use GPS fixes to rotate the non GPS sensor data into position and back-calculate measured data to make it work. Lastly, if in Ultratrack, speed calculations should be smoothed and averaged between fixes, not big humps of brief speed.

    I don't think Garmin has spent any effort on getting Ultratrack to be useful since the vast majority of users are using GPS. It is rare to even see someone chime in on Ultratrack.
    The question is if it is worth trying to get working when battery life with GPS on is already acceptable? I tried Ultratrack twice, and moved on.

    On the contrary, UltraTrac is performing exactly as designed. From the Instinct Manual:

    UltraTrac
    The UltraTrac feature is a GPS setting that records track points and
    sensor data less frequently. Enabling the UltraTrac feature increases
    battery life but decreases the quality of recorded activities.You should
    use the UltraTrac feature for activities that demand longer battery life
    and for which frequent sensor data updates are less important.

    The Instinct does not have some kind of inertial guidance system, or "dead reckoning," that would allow it to extrapolate track/speed/distance info in the absence of a GPS signal.

    Your dream of "How it should be working..." is a nice dream, but not based in fact.

    HTH

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  • 0deeter26_2over 5 years ago

    Holding the handrails while walking or running on a treadmill may decrease the accuracy of the recorded speed and distance. I'm not sure if that is dream or fact based but seems to fall into the category of common sense.

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  • 0AztecMountainover 5 years ago

    What do folks make of the elevation differences in both of your tests? why do they provided different numbers there?

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  • 0LiquidSquidover 5 years ago

    On the contrary, UltraTrac is performing exactly as designed. From the Instinct Manual:

    The Instinct does not have some kind of inertial guidance system, or "dead reckoning," that would allow it to extrapolate track/speed/distance info in the absence of a GPS signal.

    Your dream of "How it should be working..." is a nice dream, but not based in fact.

    HTH

    The thing is the Fenix DOES have all the sensors needed for dead reckoning, maybe not the Instinct, but all but the accelerometer in an "event mode" and gyroscopes are not typically used for activities. It is likely in an effort to conserve energy, or the sensors don't really have the capability of doing much more than rudimentary tasks. It may be performing "exactly as designed" but I don't like how it is designed. It appears to be minimal effort of meeting the advertised functionality, and as such, it can't really track the way I would expect with a reasonable degree of performance. Wishful thinking? Perhaps, but these devices are not cheap either.

    I would like to see how many people on these forums have actually used this mode with any level of success?

    But still, the GPS modes are perfectly acceptable for my use case. It just bothers me that it isn't implemented a little better and I purchased under the impression I could use it for navigating on multi-day hikes in the ADK (if I ever get the chance!) without dragging along a charger. I am fine with inaccuracy ~10%, even 20%, but getting into the 50% range makes it pretty useless. It is especially aggravating if you are navigating the woods and can't find your previous location as your recorded track slices through a deep valley with a creek running through the middle of it or over the crest of a cliff.

    I have been in bush-whack scenarios where it would be really helpful to shortcut to a trail you already hiked. I wouldn't want to try it with this mode.

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Different distance with GPS/Ultratrack - Instinct  - Outdoor Recreation Archive (2024)

FAQs

How accurate is the Garmin instinct GPS distance? ›

With a strong satellite signal, the GPS position reported by a watch should be accurate to about 3 meters or 10 feet. A weaker satellite signal may decrease that positional accuracy, in turn affecting the accuracy of the distance and speed readings that will be reported by the watch.

Does Garmin Instinct track distance? ›

The odometer automatically records the total distance traveled, elevation gained, and time in activities. From the watch face, hold MENU.

Why is my Garmin distance inaccurate? ›

The most common cause of inaccurate distance readings is that unit settings are set incorrectly to either metric or yards. If your local course measures distance in metric, but your watch is set to yards, the distance will consistently be off.

How do I make my Garmin GPS more accurate? ›

How Can I Improve GPS Distance and Accuracy on My Garmin Device?
  1. Wait a Few Moments After Acquiring a GPS Signal. ...
  2. Turn on Auto Pause. ...
  3. Enable Every Second Recording. ...
  4. Enable Additional Satellite Settings. ...
  5. Use Distance and Speed Recording Accessories. ...
  6. Reduce Environmental Factors.

How do I calibrate my Garmin distance? ›

Calibrating the Treadmill Distance
  1. Start a treadmill activity (Starting an Activity), and run at least 1.5 km (1 mi.) on the treadmill.
  2. After you complete your run, select STOP.
  3. Select an option: ...
  4. Check the treadmill display for the distance traveled, and enter the distance on your device.

How do I calibrate my Garmin instinct? ›

Calibrating the Barometric Altimeter
  1. Hold MENU.
  2. Select Settings > Sensors & Accessories > Altimeter.
  3. Select an option: To calibrate automatically from your GPS starting point, select Auto Cal., and select an option. To enter the current elevation manually, select Calibrate > Yes.

Why is my Garmin not recording distance correctly? ›

Check your GPS settings

If you've just got GPS, select GPS+Glonass, or GPS+Galileo - these are all different global navigation satellite systems (GNSSs) and using more than one will make your activity recording more accurate.

How does Garmin calculate distance? ›

How does Garmin do it? It learns your arm swings when doing GPS runs, and then when GPS is lost, it uses the collected data to estimate pace based on your arm swings. It then multiplies by your known average stride length to get distance.

Is Garmin accurate for distance? ›

Garmin GPS receivers are accurate to within 15 meters (49 feet) 95% of the time with a clear view of the sky. Generally, users will see accuracy within 5 to 10 meters (16 to 33 feet) under normal conditions. Certain atmospheric factors and other sources of error can affect the accuracy of GPS receivers.

What types of GPS does Garmin instinct have? ›

Navigation you can count on.

Access multiple global navigation satellite systems (GPS, GLONASS and Galileo) to track in more challenging environments than GPS alone.

Does the Garmin instinct show GPS coordinates? ›

The easiest way is long-pressing the GPS button. Once the satellites are acquired, you get the coordinates.

Is Garmin instinct good for navigation? ›

The Garmin Instinct has a magnetic compass. We recommend a quality stand-alone compass for map and compass navigation; however, the watch's compass is great for determining one's general direction.

How accurate are Garmin GPS coordinates? ›

Garmin® GPS receivers are accurate to within 15 meters (49 feet) 95% of the time. Generally, users will see accuracy within 5 to 10 meters (16 to 33 feet) under normal conditions.

Is Garmin Instinct good for navigation? ›

The Garmin Instinct has a magnetic compass. We recommend a quality stand-alone compass for map and compass navigation; however, the watch's compass is great for determining one's general direction.

Are Garmin GPS watches accurate? ›

The GPS location accuracy of Garmin outdoor watches is around 3 meters (10 feet), 95% of the time. This means, at any given time, your watch will save your location within 3 meters of your actual location.

How accurate is GPS distance tracking? ›

Typical GPS accuracy

GPS is typically only accurate to, at best, around 10 feet or 3 meters in direct view of a clear sky.

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