[Talk-GB] Large swaths of "heath" on Dartmoor

[SK53]

I'm not really suggesting replacing the tag, I just want to make it easier
to find lowland heath.

For now these 2 pages by Alan Silverside (Uni of West Scotland) provide
lots of good illustrations (names are still botanical though):


   - Heathland 1: http://bioref.lastdragon.org/habitats/Heathlands1.html
   - Heathlands 2: http://bioref.lastdragon.org/habitats/Heathlands2.html

Good examples of Acid Heath (D1.1 in Phase1) from Wales which may be
familiar:

   - South Stack, Holy Island, Anglesey
   - Yr Eifl & Mynydd Rhiw on Llyn
   - Rhinogs around Cwm Bychan (but not S part of range from Y Llethr
   towards Barmouth
   - Hills around World's End (N of Llangollen)
   - Much of Tryfan and the land to the S around Bwlch Tryfan
   - Moel Meirch (NW of Cnicht & S of Nant Gwynant)
   - Mynydd Mawr
   - Black Mountains S of Hay Bluff
   - Gray Hill, Gwent
   - Presellis
   - Radnor Forest and hills to S (SW of Gladestry)

Of these areas Mynydd Rhiw and the S Rhinogs offer good examples of this
heath in a mosaic with grassland.

Basic Dry Heath (D.1.2) is very rare in Wales.

Damp Heath (D.2):

   - E side of the Rhinogs S of Coed y Brenin forestry
   - On the Migneint S of Ysbyty Ifan
   - A small patch SW of Sennybridge (Fforest Fawr), much of the rest a
   mosaic with grassland
   - Several patches on the S side of the Carneddau overlooking the A5

Lichen Heath (D.3)

   - Summits of the Glyderau

Montane Heath (D.4)

None in the Welsh dataset

Mosaics (D.5 & D.6), see above where some have been noted under the
core-heathland type.

Now I need to find more useful pics of these sites.

Jerry

On 25 September 2017 at 14:53, Andy Townsend <ajt1047 at gmail.com> wrote:

> On 25/09/2017 13:36, SK53 wrote:
>
> When this thread first started I thought we could work to remove these
> multiple meanings, but having seen what places with natural=heath from
> Corine imported-data in the Cevennes,  suspect that this is an unrealistic
> objective.
>
>
> Well just because one bad import used "Tag A" is not necessarily a reason
> to not use "Tag A" elsewhere.  If we did that we'd never use
> highway=residential post-TIGER :)
>
> The alternatives are to start sub-typing natural=heath, with heath or
> heath:type. The main category to identify in the short-term are the classic
> lowland heaths which are scarce & threatened in the UK.
>
> Wikipedia has a partial tabulation
> <https://en.wikipedia.org/wiki/Heaths_in_the_British_National_Vegetation_Classification_system>
> of the formal heath categories in the National Vegetation Classification,
> which may help as background reading. I'm sure that pretty much all
> communities in the U-group (calcifugous grassland & montane), several Mires
> (e.g., M15 & M16), and even some calcicolous upland grasslands are included
> in current natural=heath.
>
> At a more practical level the JNCC Phase 1
> <http://jncc.defra.gov.uk/PDF/pub10_handbookforphase1habitatsurvey.pdf>
> guide recognises 6 heath categories, of which 4 are relatively common: wet
> & dry heaths, and their respective mosaics with grassland. Anything where
> the peat depth in the soil is NOT regarded as a heath, but will be a Mire
> community (pennine moorland will be largely blanket bog in this
> terminology).
>
> Both NVC <https://wiki.openstreetmap.org/wiki/Key:plant_community> &
> Phase1 <https://wiki.openstreetmap.org/wiki/Proposed_features/Key:habitat>
> have relevant pages on the wiki for (slightly) further info. NVC is clearly
> far too technical for just about everyone, but Phase1 is probably usable
> with a small bit of guidance.
>
> Probably the best way to take this forward is to compile good examples of
> places people are likely to know (particularly in National Parks) which
> have a known classification AND a reasonable number of usable images on
> Geograph. Wales is the easiest place to do this because the whole of the
> country was mapped using Phase1.
>
>
> What would be useful to me would be to know what questions I should be
> asking myself to allow something tagged sensibly down the line?  Can they
> be reduced from the 11 pages in "pub10_handbookforphase1habitatsurvey.pdf"
> that you linked to and phrased in ways that I could actually understand
> ("Ulex europaeus, Cytisus scoparius and Juniperus communis scrub" is
> something that would make Oleksiy in the Latin "talk@" thread very happy,
> but it's all greek to me!)?
>
> Best Regards,
>
> Andy
>
>
>
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