Changeset: 69293719
Andaman Sea
Closed by Olyon
Tags
created_by | JOSM/1.5 (14945 fr) |
---|---|
source | International Hydrographic Organization S-23 draft 2002 https://www.iho.int/mtg_docs/com_wg/S-23WG/S-23WG_Misc/Draft_2002/Draft_2002.htm |
Discussion
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Comment from woodpeck
Hello Olyon, I disagree with mapping bays, straits, channels, and various other named water areas as precise, hundreds-of-members polygons in OSM. I think a named node is sufficient. Using polygons means you are creating arbitrary cut lines between various bodies of water, like e.g. https://www.openstreetmap.org/way/684290011. This kind of mapping is very difficult to maintain, prone to breakage, a burden on other mappers working in the area, and adds very little information. I would prefer it if you could stop copying this data into OSM from external sources, or else, have a proper discussion about it on one of the suitable international mailing lists before you embark on global mapping projects like this.
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Comment from woodpeck
Also, I disagree with creating groups of islands like the nNicobar Islands here https://www.openstreetmap.org/relation/9493294 by taking all the individual coastline bits and putting them into one big relation in addition to the individual island relations they are already in. I also think that *if* such mapping made sense, using a type=multipolygon is the wrong relation type to use. If you feel a need to combine these individual islands into one group, I would make the individual island relations a member of a super relation, instead of duplicating information. Someone wanting to edit, say. the coast of Camorta Island will now not only edit a coastline way, but three relations. This is confusing to mappers.
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Comment from Olyon
Hello,
For groups of islands, there is no other way to tag a surface thing. the only way it is to use multipolygons and in the multipolygon, it is necessary to use ways and no other multipolygon https://wiki.openstreetmap.org/wiki/Relation:multipolygon.If the problem is to maintain them, it would also be necessary to suppress the relations for the majority of the countries which are also relations of hundreds of members.
To represent things very big only with nodes, I do not understand how that could be enough.
The problem of the fuzzy limits, I understand it but it is the case for a lot of thing in osm: like the coastlines, and many of the tags natural=* like the tags landuse=*. Here the limits are, of course, much more fuzzy especially in high seas but is this a reason not to make appear these objects in osm ? We could make appear this uncertainty on the way traced by new tags.
- 684290001, v1
- 684290002, v1
- 684290003, v1
- 684290004, v1
- 684290005, v1
- 684290006, v1
- 684290007, v1
- 684290008, v1
- 684290009, v1
- 684290010, v1
- 684290011, v1
- 684290012, v1
- 22825615, v22
- 22825616, v33
- 22825619, v27
- Bompoka Island (22825620), v8
- Tarasa Dwip Island (22825622), v18
- Isle of Man (22825623), v6
- Batti Malv Island (22825626), v12
- Car Nicobar Island (22825634), v29
Relations (1-20 of 31)
- 1
- 2
- Intervew Island (9493291), v1
- Cinque Islands (9493292), v1
- Coco Islands (9493293), v1
- Nicobar Islands (9493294), v1
- Andaman Islands (9493295), v1
- Spike II Island WLS (9493296), v1
- Pitman Island WLS (9493297), v1
- Kyd Island WLS (9493298), v1
- Smith Island (9493299), v1
- Ross Island (9493300), v1
- Reef Island WLS (9493301), v1
- Paget Island WLS (9493302), v1
- Twin Islands (9493303), v1
- Rutland Island (9493304), v1
- Tillanchong Island (9493305), v1
- Great Nicobar Island (9493306), v1
- Camorta Island (9493307), v1
- Katchall Island (9493308), v1
- Nancowry Island (9493309), v1
- Pulau Peunasu (9493310), v1
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