On Sunday 14 April 2019, Grigory Rechistov via Imports wrote: > Dear OSM community, > This is an announcement and request for comments, suggestions, and > approval of land cover information data import for the territory of > Sweden. > > [...]
Had a quick look over your description. My general recommendation would be not to import any landcover data in OSM generated through automated classification of satellite imagery. There are multiple reasons for this, the most significant probably is that this is inherently incompatible with the tagging system and the way how things are mapped in OSM. Part of this stems from the very idea of closed landcover classification systems as not being meant to positively identify certain areas but assigning essentially the least unlikely of a set of potential classes to every point on the surface. Another part of this is due to many of the tagging distinctions we have in OSM - like natural=wood vs. natural=scrub, natural=scree vs. natural=bare_rock, landuse=commercial vs. landuse=industrial or leisure=park vs. leisure=garden being indistinguishable based on spectral characteristics alone. Therefore you'd not just be importing data into the existing OSM tagging system, you'd import the whole classification system and philosophy behind it. Don't get me wrong - i am not opposed to using automated analysis of open data satellite imagery for more efficient mapping in OSM. This has a lot of potential. But this has to be done specifically for OSM and for the tagging and mapping standards we have and it has to be controlled by the mapper. There is no shortcut to this by importing data sets created for a completely different purpose with completely different goals. -- Christoph Hormann http://www.imagico.de/ _______________________________________________ Imports mailing list [email protected] https://lists.openstreetmap.org/listinfo/imports
