[Tagging] رد: New rag to draw node name with rotate angle

Martin Koppenhoefer dieterdreist at gmail.com
Sat Nov 10 15:17:19 UTC 2018

sent from a phone

> On 10. Nov 2018, at 07:01, دار الآثار للنشر والتوزيع-صنعاء Dar Alathar-Yemen <hubaishan at outlook.com> wrote:
> I am talking about nodes not areas or ways. Most of seas in OSM are tagged on node element. Also countries most of them are tagged on node element

these country nodes come from the old days when we hadn’t administrative boundaries. Today we have all or maybe almost all countries as detailed boundaries.

It is true the seas are mostly mapped as nodes although there are some parts mapped as polygons, e.g. https://www.openstreetmap.org/relation/7156290

From a data point of view, adding an angle to a node to specify a label orientation will likely be rejected as tagging meta information that is not objectively observable, but one could say the tag is about the principal orientation of the represented waterbody and it would be much harder to question it ;-)

As a node doesn’t have orientation nor extent, the information could be valuable.

From a practical point of view, for rendering, a line for label placing seems a better solution as it gives indications about scale, orientation but also shape (e.g. curved). There are tools around that can calculate the line from areas. Drawing them yourself would also be an option, there are not so many of these if you are only interested in seas and oceans. It might be interesting to see alternatives to osm for those, e.g. Natural Earth has global simplified water areas with names.

Cheers, Martin 
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