[OSM-talk] Garmin GPS and OSM-based maps

Thu Nov 8 15:17:16 UTC 2018

Hi Andy,

Thank you. It was helpful.

It is definitely better than a smartphone, mostly to the battery (14-16 
hours) & EGNOS correction. I learned how to install the OSM map on the 
device, - basically export/copy/paste the .img file.

I also acquired an accessory, - a big aluminum clip to attach the device 
to a backpack. It is quite convenient to keep it outside, well visible 
to satellites.

Best regards,
O.

On 06.11.18 13:46, Andy Townsend wrote:
>
> Whilst it's great that Garmin are offering the convenience 
> pre-installed OSM-based maps, it's worth bearing in mind that there 
> are lots of free download options - see 
> https://wiki.openstreetmap.org/wiki/Mkgmap for creating your own and 
> https://wiki.openstreetmap.org/wiki/OSM_Map_On_Garmin/Download for 
> ready-made downloadable options.
>
> http://garmin.openstreetmap.nl/ is a good place to start for "I want 
> maps for a certain part of the world".
>
> There are lots of help questions about the mechanics of installing 
> maps on Windows, Linux, MacOS etc. at https://help.openstreetmap.org/ 
> , and these might be an easier place to start reading than the wiki 
> (which can be a bit confused at times).
>
> I do have a GPSMap64s with preinstalled Garmin maps* that aren't 
> OSM-based.  One problem with those is that they contain lots of old, 
> inaccurate non-OSM POIs that it's impossible to turn off without 
> removing the SD card - hopefully your OSM-based maps from Garmin won't 
> share this problem.
>
> Re EGNOS on an Etrex 35, assuming it's similar to an Etrex 30x, it's 
> noticeably more accurate (within a few meters as opposed to a few tens 
> of meters) when you're somewhere with WAAS/EGNOS coverage compared to 
> when you're not (in my case it was Europe with and Australia without, 
> but that was a while ago - don't know if the Australian situation has 
> changed).
>
> Barometric altimeter (on both Etrex30x and GPSMap64s) tend to be 
> accurate to within 10m at the top of the hill if you've calibrated 
> them at the bottom, but not if you haven't (apologies for being 
> Captain Obvious there!).
>
> Battery use on both Etrex30x and GPSMap64s are something like "one 
> pair of rechargeable AA batteries every day and a half" (if it's on 
> all day).
>
> Re the new 66s my understanding is that it can use 2 of 
> GPS/Glonass/Galileo at the same time.  Personally I'd wait to see a 
> "review involving OSM-based map use" before getting one, but I'm sure 
> they'll appear fairly soon.
>
> Other non-Garmin options for "something to last all day" might be an 
> old phone with GPS in it and user-removable batteries.  An old 
> Blackberry might be an option (they still work after you manage to 
> drop them on the floor, and you might find the keyboard more usable 
> than a touchscreen when it's cold).
>
> Best Regards,
>
> Andy
>
> * at the time this was essentially "free" due to availability and what 
> stock the various discounters carried - in theory its about £60 extra, 
> and probably isn't worth that.
>
>
> On 06/11/2018 11:37, Oleksiy Muzalyev wrote:
>> Thank you, dikkeknodel.
>>
>> I also received an email message with an advice to acquire Garmin 
>> eTrex.  I've ordered the Garmin eTrex 35 Touch with the pre-installed 
>> «TopoActive» Karte Europa, which is based on the OSM data, as I 
>> understood:
>> https://www.brack.ch/garmin-hand-gps-etrex-touch-370929
>>
>> It supports the EGNOS, European Geostationary Navigation Overlay 
>> Service, which is supposed to correct the GPS signal. I have no idea 
>> how it works in reality. It also has got the GPS and barometric 
>> altimeters.
>>
>> Best regards,
>> Oleksiy
>>
>>
>>
>> On 05.11.18 19:59, _ dikkeknodel wrote:
>>>
>>> Hi all,
>>>
>>> Thanks for all the great advice. I’ve looked into uMap and it does 
>>> the job perfectly. With all the gpx of over a year of hiking 
>>> imported it still runs smoothly.
>>>
>>> I would like to prevent running into performance issues later 
>>> though. Does anybody know if it is wise to add ‘simplified’ versions 
>>> of the gpx to uMap instead of the original recordings with 1 s 
>>> resolution?
>>>
>>> Since the published data is public, I just have to take into account 
>>> not to import gpx which start from my home since I value my ‘sort of 
>>> anonymity’.
>>>
>>> *@Oleksiy*
>>>
>>> To answer Oleksiy’s question, I record with OSMand on a Moto G4 
>>> smartphone, that works like a charm. Off course there is fluctuation 
>>> due to accuracy errors, I guess 10-15 m is achievable most of the 
>>> time, but close to near vertical mountains it becomes much worse.
>>>
>>> It however does never happen that I miss long stretches of data 
>>> (except for tunnels 😝). I did have that problem in the past, when 
>>> <15% battery charge and Android automatically started the battery 
>>> saving mode. That just turned of the gps antenna whenever the screen 
>>> was off. So now I have set battery saving mode to off.
>>>
>>> Also OSMand does not drain the battery much. Usually I do take a lot 
>>> of notes which OSMand attaches to the gpx and loads perfectly into 
>>> JOSM. Recently I also used the voice recorder of OSMand, which 
>>> really speeds up the note taking while on the go in comparison to 
>>> typing. These also load into JOSM via the gpx, but some fiddling 
>>> with the location of the audio is required. Taking notes on the 
>>> phone does have an effect on the battery life off course. A 20 km 
>>> hike in the mountains easily takes 6-8h, which my phone reaches most 
>>> of the time on one charge in flight mode. I do have a power-bank as 
>>> back-up, and for multi-day hikes though.
>>>
>>> Altitude measurements have always been a bit tricky with OSMand. I 
>>> guess the raw elevation data from gps fluctuates quite a lot, and 
>>> the data processing did not do a good job filtering errors from 
>>> actual elevation change. After a hike with 1000m elevation gain 
>>> according to the map, OSMand often showed I did 5000m... The graph 
>>> of the track you can generate in OSMand also showed a lot of spikes 
>>> with instant ascents of >200m. Recently that seems to have changed 
>>> and the measurements seem to better represent the actual situation.
>>>
>>> Hope this helps you with you work OSM workflow!
>>>
>>> Cheers,
>>>
>>> dikkeknodel
>>>
>>> *Van: *Oleksiy Muzalyev <mailto:oleksiy.muzalyev at bluewin.ch>
>>> *Verzonden: *zaterdag 3 november 2018 18:51
>>> *Onderwerp: *Re: [OSM-talk] How to get an overview of multiple gpx 
>>> on OSM map?
>>>
>>> Hi _dikkeknodel,
>>>
>>> I have a question - how do you record a GPX trace during 20 km walk? 
>>> It should be about 4 hours.
>>>
>>> I also record GPS traces but usually for 15-20 minutes. I use a 
>>> phone with the OSMTracker app for Android with mixed results. 
>>> Sometimes it records a path well, sometimes it turns the second part 
>>> of the walk into a long direct line. Such a trace I usually discard.
>>>
>>> Besides it empties the phone battery rather quickly. I usually take 
>>> a power-bank with me, but still it is not a good solution to get a 
>>> phone battery empty in mountains.
>>>
>>> I am thinking of getting a dedicated device which can record the GPX 
>>> files, on the OSM map, and also measure and altitude more or less 
>>> correctly. The question is - what device, what model.
>>>
>>> Best regards,
>>> Oleksiy
>>>
>>>
>>> On 03.11.18 16:09, _ dikkeknodel wrote:
>>>
>>>     Hi all,
>>>
>>>     Ever since I moved to Switzerland over a year ago I’ve been both
>>>     hiking in the mountains and updating OSM details a lot. Since I
>>>     hike at least 20 km every weekend, it must have totaled to about
>>>     1200 km by now all across the country. I would love to get an
>>>     overview of where I have been so far.
>>>
>>>     Since I’ve got a GPX file of almost every hike, the data is
>>>     there. I am now looking for a nice graphical way to plot all of
>>>     these files at once on a nice OSM map, OpenTopoMap as a base
>>>     layer would be great.
>>>
>>>     I’ve been searching for a while how to arrange this (without
>>>     much programming knowledge), but I am kind of lost at the moment.
>>>
>>>     Does anybody have a hint?
>>>
>>>     Cheers,
>>>
>>>     dikkeknodel
>>>
>>>
>>>
>>>
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>>>
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>>>
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>>>
>>>     https://lists.openstreetmap.org/listinfo/talk
>>>
>>
>>
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