Hi, since I accidentially discovered several intersecting waterways in Japan I had a deeper look into the data. I looked for intersections of ways tagged with waterway=canal waterway=drain waterway=ditch waterway=stream waterway=river with the tool waycheck20.pl¹. On the script I disabled not matching for layers since all the imported waterways I checked had generally a layer= tag from -1 to -3 on them regardless the reality (compared with Bing). The waterways I extracted from japan.osm.pbf at download.geofabrik.de using osmfilter². The result with 2670 intersections you can find here³. A cleanup by the importers would be nice. It also would be interesting to check the other parts of the import but I leave that to other people. :)
An updated check I will only deliver on request since the script is quite slow. As you can see on bottom of the result page it took more then 80 hours to run. I put the text above also to the matching wiki page: http://wiki.openstreetmap.org/wiki/Import/Catalogue/Japan_KSJ2_Import#Post_Import_Cleanup Best regards Thomas ¹ http://wiki.openstreetmap.org/w/index.php?title=WayCheck&action=edit§ion=30 ² http://wiki.openstreetmap.org/wiki/Osmfilter ³ http://malenki.ch/OSM/out_ignore_layer_no_riverbanks.html _______________________________________________ Talk-ja mailing list Talk-ja@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ja