[Tagging] Tidal inlets / creeks

Malcolm Herring malcolm.herring at btinternet.com
Tue Jan 18 22:48:42 GMT 2011

On 18/01/2011 17:09, john at jfeldredge.com wrote:
> It seems to me that you would need to map a series of depth contours, not simply mark channels as navigable or not navigable, as different craft will require different depths of water.  Also, this information will need to be updated frequently, as some shoals can shift position with every storm.
>> Thanks.  I understand what you're suggesting, and I was probably a bit
>> misleading in my original email.  The problem is how to differentiate
>> between sub-low-water level areas that are 2m deep, and the (often
>> man-made) channels that are sufficiently deep to allow navigation.

This then becomes a nautical chart, which is outside the scope of a land 
map such as OSM. The OpenSeaMap (openseamap.org) project is attempting 
this endeavour. Any ideas and help would be welcome.

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