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GPS & Digital Data Discussion / Re: which GPS map for US ?
« on: April 12, 2023, 11:15:48 am »
Hi
back in 2016 I used successfully the Velomap.org US map on an Garmin etrex 20 for the Route 66 for general orientation, but not for navigation.
Velomap is donation ware, using the same OSM data that Garmin is using.
If you are travelling along ACA routes, use ACA maps in addition. Their information is audited and normally up-to-date. OSM data, and hence also Garmin maps are not audited.
In addition, the quality of OSM data is very variable. In particular in Arizona, NM, California, the map contained, and still contains, many "tracks" without classification, which may be anything between non-existing or a rough 4-wheel trace on private land to a minor public road. I think the situation has improved since 2016 but I still find many places with this problem. So don't trust any bicycle navigation in those areas (and consult the ACA maps).
Reagrds
Volker
(Padova, Italy)
back in 2016 I used successfully the Velomap.org US map on an Garmin etrex 20 for the Route 66 for general orientation, but not for navigation.
Velomap is donation ware, using the same OSM data that Garmin is using.
If you are travelling along ACA routes, use ACA maps in addition. Their information is audited and normally up-to-date. OSM data, and hence also Garmin maps are not audited.
In addition, the quality of OSM data is very variable. In particular in Arizona, NM, California, the map contained, and still contains, many "tracks" without classification, which may be anything between non-existing or a rough 4-wheel trace on private land to a minor public road. I think the situation has improved since 2016 but I still find many places with this problem. So don't trust any bicycle navigation in those areas (and consult the ACA maps).
Reagrds
Volker
(Padova, Italy)