Hi, the EEZ boundary is a maritime exclusive economic zone. It is mapped as relation 4121287 in OSM: http://localhost:8111/import?url=http://www.openstreetmap.org/api/0.6/relation/4121287/full (using a josm/mercator remote-control link instead of a website link because the website is likely to timeout).
There are a few problems with it: * At ~4000 members, it is enormous. JOSM validator takes over a minute to check it on my machine. It's the biggest relation we have, even the four regions are about half the size. * It only has a fraction of the islands it ought to have, and most of those are mistakenly tagged as outer instead of inner. * It keeps breaking (non-closed ways), and the more members a MP has the more laborious it is to fix it. What should we do with it ? Either... a) Add all the missing islands, fix their roles pros: that's the best theoretical way to map a maritime area cons: will exacerbate all the size-related problems b) Keep as-is but drop all the islands pros: reduces the size strain a bit cons: not a true maritime area anymore. Boat navigation will surely not get fooled by this, but other tasks like for example area calculation gets more complicated. c) Same as b) but follow the ROI-NI border instead of the coastline Same pros and cons as b), only stronger d) Only keep the maritime ways pros: simplest version cons: not much can be done with it appart from rendering (for example a bot can't determine wether it is navigating within the EEZ anymore) e) Use multilinestring relations to simplify the geometries pros: great reduction in member count. Same technique could be used to simplify the other county and region MPs cons: not all tools support multilinestring relations (what about nominatim ?), they are used in France for example but are not yet a standard osm feature. Islands still need to be supported, as in a). I'm leaning towards solution c), but could be convinced of either. What do ye think ? _______________________________________________ Talk-ie mailing list Talk-ie@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ie
