To allow me to route plan without the aid of cell service or wifi access, (getting ready for a trip to Alaska, and much of the trip has no cell service/wifi access), I created a sparse pbf file of the North American continent(only contains roads down to the level of tertiary. Basically residential and lower roads are filtered out with osmfilter. Then created an north_america_sparse.obf using the sparse pbf. ( 16 hours of cpu time on my laptop.) Using this, OsmAnd can calculate an accurate route of 8550km ( from my house in Florida to Deadhorse, Alaska) in about 3 minutes. Of course OsmAnd warned me to add additional way points if route not calulated after 10 minutes, but it was able to compute the route in less than three minutes.
What I mean by accurate is that when I overlay the created track with tracks created online with the various web base route planners, in most cases there is a perfect match, sometimes a very short section of the track choose to go through a city, or around a city. Not wrong just different. Few years back, on some forum, I saw a request by someone for a route-able world_map.obf. This is kind of what I did here. I guess I hoping that eventually sparse obf data for entire continents would be available from the various sources for obf map data. Or perhaps this data is already available and I'm just not aware of it. One of my favorite very simple nav apps is Amap. It's meant for hiking, but I can import that 8550km route into it and use Amap as an emergency backup navigation system. What a disaster it would be if in the middle of nowhere, I accidentally delete my imported route. So not being able to create a route in the absence of cell service/wifi is a safety of life issue so I've been pursing this. Kevin -- You received this message because you are subscribed to the Google Groups "OsmAnd" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/osmand/b5d414a7-05d5-4ea1-8799-fe0693b5ac79n%40googlegroups.com.
