2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/48985529) has short arc (4.32m) at http://www.openstreetmap.org/?mlat=51.08649&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/37744345) has short arc (3.00m) at http://www.openstreetmap.org/?mlat=51.06445&mlon=6.94911&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way Walter-Kollo-Straße (http://www.openstreetmap.org/browse/way/23017957) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.08967&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109421427) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13921&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109421434) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13930&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109421435) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13936&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109421438) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13923&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109421461) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13925&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109421454) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.13940&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109421453) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13934&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109421447) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13932&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109421444) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13938&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/111651993) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.13616&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/102541271) has short arc (4.48m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=7.17150&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/103779425) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12621&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/103779441) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12632&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/117921943) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.14535&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/117921924) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.14526&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/23398331) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.12666&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90527752) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12838&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90526447) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12878&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90526442) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12906&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109857484) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13644&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109857477) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13653&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109857498) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13642&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109857436) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13640&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109857449) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.13649&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109857470) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13647&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/109857458) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13638&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/131612525) has short arc (4.48m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=7.17703&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/91710410) has short arc (4.32m) at http://www.openstreetmap.org/?mlat=51.16498&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/115883352) has short arc (2.99m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=6.94581&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:00 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/115883317) has short arc (2.99m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=6.94377&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/88975821) has short arc (2.99m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=7.05932&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/88975823) has short arc (2.99m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=7.05932&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90215070) has short arc (2.99m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=7.02250&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/55468386) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.14374&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/97206434) has short arc (3.00m) at http://www.openstreetmap.org/?mlat=51.06445&mlon=7.00900&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way Linderfeldstraße (http://www.openstreetmap.org/browse/way/23105760) has short arc (4.48m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=6.97411&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/88741275) has short arc (1.49m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=7.05131&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/88742480) has short arc (1.49m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=7.05432&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/131048840) has short arc (2.99m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=7.26458&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/112387324) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13932&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/37418756) has short arc (1.49m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=7.17150&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/52505465) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.13005&mlon=7.42676&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/4611686018432922105) has short arc (4.32m) at http://www.openstreetmap.org/?mlat=51.20800&mlon=7.42676&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/4611686018432922106) has short arc (4.32m) at http://www.openstreetmap.org/?mlat=51.20800&mlon=7.42676&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/4611686018432924090) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.14526&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90832531) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12767&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90832525) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12769&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90832517) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12762&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90832518) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12754&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90832550) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12767&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/4611686018432910882) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.09527&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/4611686018432910875) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.09527&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90833724) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12808&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90833726) has short arc (4.32m) at http://www.openstreetmap.org/?mlat=51.12739&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/125787166) has short arc (2.99m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=6.92722&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90836352) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.12735&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90836348) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.12715&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/108868016) has short arc (3.00m) at http://www.openstreetmap.org/?mlat=51.06445&mlon=6.92203&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/106933066) has short arc (4.32m) at http://www.openstreetmap.org/?mlat=51.20800&mlon=7.42676&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/100318927) has short arc (1.49m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=7.20478&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/88701455) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.12945&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/38741880) has short arc (4.48m) at http://www.openstreetmap.org/?mlat=51.32813&mlon=7.08916&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/45211731) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.20444&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/48982217) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.09527&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/23065952) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12949&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/117921941) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.14526&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90527764) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12833&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/90526439) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.12902&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way Morper Allee (http://www.openstreetmap.org/browse/way/30880778) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.22307&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:01 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/24587251) has short arc (2.39m) at http://www.openstreetmap.org/?mlat=51.21281&mlon=6.89941&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!
2011/11/22 08:19:02 WARNING (ElementSaver): 70013067.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/134467519) has short arc (4.78m) at http://www.openstreetmap.org/?mlat=51.26384&mlon=7.42676&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!