Re: [Tagging] Beaches
On Fri, Apr 9, 2010 at 9:03 AM, John Smith deltafoxtrot...@gmail.com wrote: On 9 April 2010 10:34, Cartinus carti...@xs4all.nl wrote: For everyone who has never seen the sea Seeing the sea isn't the problem, the sea is only a few blocks from here. Commonly a sandy beach consists of a dry part with loose sand above the high tide line and a wet part with compact sand between the low and high tide lines. What the wiki is trying to say, is that you should map the dry part. That isn't how I interpreted what the wiki says. Although that brings up another issue about how coastlines are legally defined as being at the mean low tide mark: This is for the determination of territorial waters and economic zones; on maps areas between low and high tide are usually not considered land, and as far as I know they are also counted as water area, not land area for determination of the area of countries and other entities. As an example, in the north of the Netherlands and the northeast of Germany there are some outlaying islands (the Wadden Islands), and the area between consists of flats of land falling dry at low tide with deeper 'flow lines' in between. On maps both of these are shown as sea. -- André Engels, andreeng...@gmail.com ___ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] Beaches
On Friday 09 April 2010 09:03:03 John Smith wrote: Although that brings up another issue about how coastlines are legally defined as being at the mean low tide mark Actually this is completely irrelevant. In OSM the coastline is not defined that way. -- m.v.g., Cartinus ___ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] Beaches
Cartinus carti...@xs4all.nl wrote in message news:201004090234.51222.carti...@xs4all.nl... For everyone who has never seen the sea Commonly a sandy beach consists of a dry part with loose sand above the high tide line and a wet part with compact sand between the low and high tide lines. What the wiki is trying to say, is that you should map the dry part. Which doesn't seem like a very good idea. Surely the whole beach should be mapped. -- Steve ___ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] Beaches
On Fri, 9 Apr 2010, John Smith wrote: From http://wiki.openstreetmap.org/wiki/Beach Beach areas should always meet with a natural=coastline way. Do not use this tag for patches of sand/gravel which are not by a coastline. Note that the natural=coastline should ideally be positioned at the average high tide line, which may mean the beach is quite small or not mapped at all in fact. By this logic wouldn't the beach cover from the average high tide line to the average low tide line? Which brings up the next issue, how to determine the average high and low tide lines from aerial imagery... Interesting that the wiki writer said that all beaches were on a coastline. Rivers here have beaches, and they have names like Town Beach (Tocumwal) Wagga Beach (Wagga Wagga). ___ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
