On Tuesday 07 August 2018, Frederik Ramm wrote: > > How is a continent node verifiable, especially with regards to its > position? What is our plan if two people should start edit-warring > about whether the continent node should be at 51.0000002, > -109.0000002 (as it currently is), or rather at 51,-109 or at > 50,-108? > > Representing a tree or a pothole with a node is not exact either, but > it's more or less within the accuracy of our available measurement > devices. Representing a city with a node is much less accurate, but > people seem to agree for most cities, placing the city node in the > heart of the old city, or where the city hall is, or some such. > > Do we really want to approximate whole continents with a point, and > if we do, where is that point to be placed?
If this is going where i think this is going (i.e. creating continental multipolygons) then hell no, please stay with the nodes. My take on node mapping of large, primarily coastline delimited features can be found in: https://github.com/gravitystorm/openstreetmap-carto/issues/2278#issuecomment-247841461 Together with the coastline data place nodes for oceans and continents contain most of the data necessary for determining location and extend of the features in question on a level of accuracy necessary for cartographic applications. And the tagging of the nodes is largely verifiable data. A word regarding tolerance of coordinates and the implication that they should be or have to be within the tolerance of measuring devices - i don't think this is or should be the case. The point of verifiability in OSM is not a tolerance threshold, it is if multiple independent determinations converge to a single data point. Standard deviation of that might be 50m or it might be 500km. If you ask a thousand mappers to position a place node for Africa and 90 percent of them place it in or around the Central African Republic you have a verifiable mapping IMO. If this is always the case for place=continent at the moment i am not sure. Documentation of the tag does not provide any help. At least the Oceania node seems more like an arbitrary labeling node - and the classification and definition of Oceania as a continent is quite culture specific as well. -- Christoph Hormann http://www.imagico.de/ _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging