Designated GPS unit vs. Smart Phone

Discussion in 'GPS 101 - Which GPS For Me' started by NJDirtRiders, Nov 24, 2013.

  1. ohgood

    ohgood Just givver tha berries !!!

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    another quick trip for gas...

    red track is Duraforce, purple is Oregon 450. I stopped at a gas station briefly, and both units were recording tracks.

    when I remembered they were recording, I created waypoints where I sat. they weren't too far apart, so I won't fault either one for being so wrong that I couldn't navigate to them. I created 3m radius circles around those points with my phones geocaching plugin, I don't think it's possible to do it on Garmin devices....
    red circle Duraforce, purple circle Oregon:
    Screenshot_2017-09-12-07-51-44.png
    upon downloading the Oregon's track at home ( it can't be used with usb-otg cables and none Wi-Fi isn't available, or Bluetooth, gah!) I saw something odd.
    the green (highlighted) track shows the Garmin is very poor at "GPS bounce" or "GPS hop" that happens when sitting still for a moment/minute. its firmware isn't smart enough to realize it's just sitting still, and instead of recording a smooth track, records every change in GPS coordinates, even though they are inside it's error range. this track could still be followed of course, but if you're going to share tracks, you'll probably rib into the "my Garmin has track point count limits" and of course have to screw with the point count in basecamp to fix the errors and reduce count. sigh.
    the phone, however, didn't record extra points. the frequency settings for the Garmin were "auto" and for the Duraforce "3m and 3 sec".

    next up, a uturn.
    Screenshot_2017-09-12-07-52-41.png

    the highlighted track is the Duraforce, the purple track is the Oregon. I know everyone talks about poor accuracy in cities with Garmins, but dang, it really went off reservation. in not sure why it recorded all those hops for a two second uturn, but it did. it was between two tallish buildings, so maybe the multi path interference isn't handled very well in the Garmin firmware, or they just don't consider it an issue. either way, I'm curious to see how bad this becomes in the woods when I'm trying to record good gpx tracks riding single track. I'm betting it won't be usable if this is the result of a uturn.
  2. portablevcb

    portablevcb Long timer

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    Are you using Locus for all this?
  3. ohgood

    ohgood Just givver tha berries !!!

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    yup.

    well, no that's not entirely true. I have to plug the Garmin into a desktop computer with basecamp (ugh) to get the waypoints and tracks off it, but finally after that I can use modern transfers like Wi-Fi and Bluetooth, to display both sets of tracks/waypoints on locus.
  4. portablevcb

    portablevcb Long timer

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    Understand the Garmin thing. A necessary evil with Garmin is Basecamp.
  5. Schmokel

    Schmokel I got peed on today.

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    Not entirely sure where to post this, but OSM+ has been taking longer and longer to find my location when I start OSM. I have a trip tomorrow and started it tonight to check the route out. Its been taking about 10m now and still doesn't have my location yet.
  6. MrMac

    MrMac Long timer

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    Try a different app. Something like GPS Essentials will give you lots of information about your gps connection. Maybe the device and not software..?
  7. Schmokel

    Schmokel I got peed on today.

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    Rebooted the phone and it worked. I hate doing that. I have it all saved onto an SD card, and last time I restarted the phone, I lost all my maps. I got an error that read something that wouldn't allow me to open the folder on the SD card. So I had to redownload everything.

    Worked this time though. phew
    DittyBag and MrMac like this.
  8. ohgood

    ohgood Just givver tha berries !!!

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    long times to location calculation usually mean the constellation is out of date. do an a-gps refresh with gps essentials / gps status / etc and it will pick up to half a second or so.

    assuming you aren't under a mine ;-)
  9. scfrank

    scfrank Old farts riding club.

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    Not really. There are many route designers that create GPX files.

    Trips.furkot.com
    sans4ver likes this.