> On 17 Jan 2016, at 1:50 PM, Warin <61sundow...@gmail.com> wrote: > > On 17/01/2016 1:12 PM, Nev Wedding wrote: >> On 17 Jan 2016, at 11:28 AM, Andrew Davidson <u...@internode.on.net> wrote: >>> On 16/01/16 11:47, Nev Wedding wrote: >>>> Though I don’t know the area you refer to, I feel landuse=water_catchment >>>> is an excellent choice and is the correct tag for an area that has a >>>> capture of water as specific defined use as already stated on >>>> https://www.wyong.nsw.gov.au/getmedia/7ca695e8-748d-4bca-beba-3b7bff8296e4/Mangrove-Creek-Dam-Brochure.pdf.aspx >>>> …says ‘Mangrove Creek Dam Catchment’ >>> The problem is that the area we are talking about is not the area in the >>> map you've linked to. > > It is at least a substantial proportion of it. > Note that the map also has the 'Mangrove Creek Weir Catchment' area that has > a similar colour, abuts one boundary > and some others areas (those are better differentiated colour wise) too. > >>> What we are talking about is a sub-section of that area that has been >>> protected for the purposes of drinking water supply. >>> >> I don’t see any problem with tagging a sub-section of the water catchment in >> a special way, with added tag restrictions if considered appropriate. >> The landuse=water_catchment does not imply that you have encompassed the >> entire catchment. >> If naming as ‘Mangrove Creek Dam Catchment’ would imply the entire area. > > A roadway can be tagged in subsections. Even if a subsection is omitted .. > the remainder are valid entries and each sub section carries the name. > I don’t agree with the asserted 'implication'.
Yes, I think you are correct > >> >> I see that individually mapped rural private properties may have portions of >> each property reserved as protected water_catchment in the future as the >> country becomes more over populated. > > In the UK many farms are in 'water catchment' areas. > This is a problem for tagging 'landuse' .. many areas are used for more than > one thing. > A solution may come out of development of other tags by the tag tagging group > (ref RFC - Discourage amenity=public_building). > > If you want to explore what is going on in the UK .. a starting point is > http://environment.data.gov.uk/catchment-planning/ > > A possibly shorter start would be > https://www.nwl.co.uk/your-home/environment/catchment-management.aspx > Basically they want any run off or sub soil water to be up to a certain > standard, not carrying too much pollution within the water catchment area. > > >> >>>> >>>> Another I like is reservoir_watershed >>>> >>>> >>> Three problems: >>> >>> 1. OSM tags are traditionally based on UK English so that'd have to be >>> reservoir_catchment > > Some don't have a reservoir but simply use the local river/s (e.g. see > https://www.nwl.co.uk/your-home/environment/catchment-management.aspx). > > So reservoir_catchment does not 'work' for all. > > "Water Catchment" is used in the UK > http://www.ofwat.gov.uk/wp-content/uploads/2015/11/prs_inf_catchment.pdf > > watershed? One definition; and area or ridge of land that separates water > flowing into different rivers. So that definitely does not fit. > > > > >>> 2. This tag has already been used in a bulk import of data for >>> Massachusetts where I assume it means something in Massachusettsan law >>> 3. Implies that this represents the entire catchment of a reservoir but >>> we're only talking about a sub-section here. >>> >> Yes, I agree that reservoir_watershed and reservoir_catchment implies the >> entire catchment representation. > > highway=motorway ... implies the entire motorway? > > I don't think so. > > Some are tagging individual farm fields ... that are not the entire farm. > I don’t 'see' the implication that any tagged area or way has to be the > entire thing even if named. Agreed :) > > > > _______________________________________________ > Talk-au mailing list > Talk-au@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-au _______________________________________________ Talk-au mailing list Talk-au@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-au
