2013/2/11 François Lacombe <[email protected]>: > Hi folks, > > Last night, FK270673 grants me ownership of his power transmission > refinement proposal > http://wiki.openstreetmap.org/wiki/Proposed_features/Power_transmission_refinement > > As the Power generation refinement one, it would be great to get it accepted > in few month. > More time may be needed to improve and complete it, instead of the Power > generation proposal.
reading this I am happy that you chose a way of tagging that is somehow compatible with what we already have (i.e. you don't change meaning of in-use tags), with the exception of power=generator (and subtags). Unfortunately power=generator is in heavy use (124233 times). Looking at taginfo it seems as if the proposed generator:type is already used (not very much): http://taginfo.openstreetmap.org/keys/generator%3Atype Personally I think we could live with the redefinition of power=generator as long as there is a broad consensus. As far as I see there remains some ambiguity from the proposed changes: should generator:source (the by far most used subtag) also be deprecated? Or would it not be logical anymore to tag the power source to a generator (e.g. this could also be "vapor"? Maybe this should become power:source=foo tagged on the proposed power=plant? You suggest to tag all kind of transformers always as nodes which doesn't seem reasonable being them sometimes quite big (the one in the example picture seems to be at least 10-20 sqm). There is really no need to reduce the use case to nodes, as there isn't a need to require an area for a substation. According to the proposal we would then need to know the exact voltage in order to distinguish between the various sizes of substations, i.e. a non-expert (one that doesn't know the voltage) mapper would tag these two the same: http://www.bilderbuch-koeln.de/bilder/k%C3%B6ln_gremberghoven_umspannwerk_der_db_industrie_e66767822_978x1304xin.jpeg http://www.pikoman.de/sonstiges/dioramen/trafohaus/fullsize/trafohaus_fertig_fs.jpg (and you would have to be a real expert in power distribution, you would even have to look up the locally used voltage when mapping in a different country, etc.) Also when evaluating the data you would have to know the used tensions in order to make a world map of power distribution. IMHO there could be a way to make a rough distinction (e.g. by using subclasses which describe the role in the distribution network like local distribution, regional distribution). cheers, Martin _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging
