[Tagging] Feature Proposal - RFC - waterway=tidal_channel

Joseph Eisenberg joseph.eisenberg at gmail.com
Sun Jun 16 06:35:35 UTC 2019

I would appreciate help with the description and definition for tidal
channels: aka tidal creeks, sloughs, pills, usually located in salt
marshes, tidal flats or mangroves.

Right now the short description is:

"A natural intertidal waterway in mangroves, salt marshes and tidal
flats with water flow in the direction of the tide"

And the longer definition:

"Use waterway=tidal_channel for a natural tidal waterway within the
coastal marine environment with bi-directional flow of salty water
which depends on the tides. Such channels form along protected coasts
with limited wave action and a gradual slope, usually within tidal mud
flats, salt marshes or mangroves. These channels can be distinguished
from rivers due to the higher salinity levels and because the flow of
water away from the sea at high tide is equal to the flow of water
towards the sea at low tide."

Does this clearly define the difference between a tidal channel and a
river or stream?

Please comment on the waterway=tidal_channel proposal or here:

I've added more photos and examples there too.

On 6/6/19, Joseph Eisenberg <joseph.eisenberg at gmail.com> wrote:
> https://wiki.openstreetmap.org/wiki/Proposed_features/Tag:waterway%3Dtidal_channel
> As discussed back in September 2018, we need another tag for tidal
> channels, also known as "pills" or "tidal creeks"
> These are natural tidal waterways within the coastal, environment with
> bi-directional flow of salt water, so they are not a stream or river
> estuary. They should be located outside of the coastline.
> Such channels commonly form along protected coasts with limited wave
> action and a gradual slope, usually within tidal flats, salt marshes
> or mangroves.
> Examples:
> 1) Wöhrdener Loch - tidal channel in mud flats:
> https://www.openstreetmap.org/way/401730966
> 2) Barbara Channel - channel in mud flats:
> https://www.openstreetmap.org/way/694300595
> 3) Cabbage Creek - tidal creek in salt marsh:
> https://www.openstreetmap.org/way/121698431
> 4) Tidal channel in mangroves:
> https://www.openstreetmap.org/way/694868357
> Image:
> https://wiki.openstreetmap.org/wiki/File:Mangroves-tidal-channels-josm-example-5km-4km-papua-indonesia.png
> See the whole proposal with more images and explanation:
> https://wiki.openstreetmap.org/wiki/Proposed_features/Tag:waterway%3Dtidal_channel
> Please comment here or on the talk page:
> https://wiki.openstreetmap.org/wiki/Talk:Proposed_features/Tag:waterway%3Dtidal_channel
> - Joseph Eisenberg
> PS: Sorry, Simon - last one this month - but I did map several hundred
> of these myself - lots of mangroves here.

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