On 05/22/2017 01:44 PM, john whelan wrote: > consider and it is a major part of engineering. No matter what compression > system is used four nodes will always take up four times the space as one > node. Maybe not with .7z compression looking for strings in the long lat > but its a good rule of thumb. Again OSM is now running the largest > database known in whatever it is running in, I forget the name. It's
OSM uses PostgreSQL with the postgis and hstore extensions. I run it locally to save on bandwidth latency, plus it works offline too cause connectivity is poor around here. Mobile bandwidth is getting better all the time all over the planet though. Adding data to OSM is better to be done the way most others do it than worrying about bandwidth. Looking into a few OSM files, I see <node> used as a building that hasn't been mapped as a polygon, ie.. just a waypoint. That's useful enough for most people trying to find someplace. For a building that actually has it's dimensions mapped, then it's a <way>, with references to each <node>. It depends what type of info you want from your map. When generating a display map, a <node> won't appear as a building, it'll just be a cute icon. If you want to see a whole building shape, it needs to be a <way>. Some buildings have both. - rob - _______________________________________________ HOT mailing list HOT@openstreetmap.org https://lists.openstreetmap.org/listinfo/hot