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

[Andy Townsend]

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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