Total ascent figures

Discussion related to the Garmin GPSMAP 66 series GPSr
truckinguy
Posts: 3
Joined: Mon May 27, 2019 11:37 am

Re: Total ascent figures

Post by truckinguy » Sun Jun 30, 2019 11:11 pm

My total ascent descent readings as well. Mostly on summits I have been it's been real close. One would say accurate. But the ascent descent readings were wrong. My wife has the same 66st and hers were very accurate. She had hers in a outside pouch mine was in my shirt pocket.

oldkingog
Posts: 38
Joined: Tue Jan 08, 2019 6:01 pm

Re: Total ascent figures

Post by oldkingog » Thu Jul 11, 2019 4:44 pm

I keep getting excited when I see that there is an update, but am always inevitably disappointed that they haven't corrected the elevation gain/loss issue yet. I went on a 7.5 mile hike after the 3.1 update. Total ascent on the device was 2935 feet while the elevation corrected figure was 1359 feet. Max elevation 9919 and min 8797.

gpsrchive
Site Admin
Posts: 430
Joined: Fri Jan 20, 2017 11:29 pm

Re: Total ascent figures

Post by gpsrchive » Thu Jul 11, 2019 9:10 pm

Can you please send the unedited GPX tracklog to webmaster@GPSrChive.com?

oldkingog
Posts: 38
Joined: Tue Jan 08, 2019 6:01 pm

Re: Total ascent figures

Post by oldkingog » Thu Jul 11, 2019 10:21 pm

File sent. Just out of curiosity, how are the files helpful to you?

gpsrchive
Site Admin
Posts: 430
Joined: Fri Jan 20, 2017 11:29 pm

Re: Total ascent figures

Post by gpsrchive » Fri Jul 12, 2019 12:23 am

I just want to examine how the GPSMAP 66 recorded elevation changes during your hike and compare to elevation data for the same location, hoping to spot something that may help determine why this is happening.

oldkingog
Posts: 38
Joined: Tue Jan 08, 2019 6:01 pm

Re: Total ascent figures

Post by oldkingog » Fri Jul 12, 2019 3:50 am

I sure appreciate your effort!

gpsrchive
Site Admin
Posts: 430
Joined: Fri Jan 20, 2017 11:29 pm

Re: Total ascent figures

Post by gpsrchive » Fri Jul 12, 2019 9:01 am

I have received your file and have made a detailed report to Garmin.

oldkingog
Posts: 38
Joined: Tue Jan 08, 2019 6:01 pm

Re: Total ascent figures

Post by oldkingog » Mon Jul 15, 2019 1:50 pm

Thank you! Did you notice anything in particular when you looked over the data?

gpsrchive
Site Admin
Posts: 430
Joined: Fri Jan 20, 2017 11:29 pm

Re: Total ascent figures

Post by gpsrchive » Mon Jul 15, 2019 3:34 pm

Yes... None of the GPX data supports the ascent/descent totals your GPSMAP 66 Trip Computer reported!

GPSMAP 66 v310 Trip Computer: 2935 ft
BaseCamp: 2953 ft
Straight GPS: 1807 ft
Straight DEM: 1522 ft
Maptech: 1257 ft
TopoUSA: 1568 ft
Strava/Garmin: 1245 ft

BTW, what are your settings in Setup > Altimeter > {Auto Calibration} and {Barometer Mode}?

oldkingog
Posts: 38
Joined: Tue Jan 08, 2019 6:01 pm

Re: Total ascent figures

Post by oldkingog » Mon Jul 15, 2019 10:56 pm

That seems odd...

My settings are:

Auto Calibration -- Once
Barometer Mode -- Variable Elevation
Pressure Trending -- Save when power on
Plot Type -- Elevation/Distance

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