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There is a small stream hereabouts that runs along and in some places actually along a road. How can I ensure that the stream is not covered by the road when its rendered? Need z dimension if you see what I mean |
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If the stream actually runs along the road for a bit then you can map that bit of way as "both road and stream" - https://www.openstreetmap.org/way/42000985 is an example. The important thing to do is to make sure that a "ford=yes" tag is set on the bit of way that is both road and stream so that data consumers know about it. Different renderers will show this in different ways - "OSM Carto" shows an icon in the middle of it; this one shows the road slightly differently (with a blue border) to show that it is a "long ford". If you can link to the area we can make more detailed suggestions. |
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I would create a node on the stream ford=yes like this one. The stream is also tagged as layer -1, the road as no layer tag. https://www.openstreetmap.org/#map=19/52.19760/-0.07389 I have seen almost a meter of water on the road half way between these two fords although 99.9% of the time the steam is to the side and off the road. 1
Tagging the objects with different layers conflicts with the definition of a ford: a spot where a road and waterway physically intersect. In the case of a ford, both should have the same layer. In your example, the tags indicate that the stream flows under the road, which then isn't a ford.
(16 Dec '19, 18:09)
alester
Thanks for pointing that out. I just used a local ford as an example, then described the tags i had found. I did have doubts, but maybe the mapper used -1 as the water is usually in the gulley by the road.
(16 Dec '19, 20:35)
andy mackey
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Here is a link showing the "leats" in Helston, Cornwall, UK several Cornish towns have them. I towns the are quite neat and tidy but the rural ones are less so and spill over the road. https://historicengland.org.uk/listing/the-list/list-entry/1208156