Re: [OSM-talk] Garmin GPS and OSM-based maps
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
[OSM-talk] Garmin GPS and OSM-based maps (was: Re: How to get an overview of multiple gpx on OSM map?)
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
