Mapping of Tansley code

[damianooldoni]

All Tansley codes seems conform to the scale I found online, except the codes z and cd. Here below the proposed mapping. To be reviewed by VMM.

z

I think z means "zeldzaam", which is the NL translation of the English value s, "sporadic".
Proposed: use s.

cd

cd stands for "codominant", clearly. On the website I see that the allowed versions for "codominant" are c or cod. Proposed: use c.

field name in English

I propose to use "Tansley Vegetation scale". Used as value in DwC field organismQuantityType.

[flavens-vmm]

<TITLE>tansley</TITLE> tansley

vhawc	categorie	code	omschrijving	weging
RW	rivier	z	Zelden (1-3 exemplaren)	1
RW	rivier	o	Occasioneel (meer exemplaren, <1% bedekkend)	1
RW	rivier	f	Frequent (1-5%)	2
RW	rivier	la	Laag abundant (5-25%)	3
RW	rivier	a	Abundant (25-50%)	4
RW	rivier	cd	Co-dominant (50-75%)	5
RW	rivier	d	Dominant (75-100%)	6
LW	meer	Z	zeldzaam	1
LW	meer	o	occasioneel	1
LW	meer	f	frequent	2
LW	meer	a	abundant	3
LW	meer	cd	co-dominant	4
LW	meer	d	dominant	5

The weight is used for calculation of EQR (EKC). Has the calculation of EQR been referenced? The weight of Tansley code could be just referenced there. However, as one can see, the weight depends on the category (of the waterbody). the category has not been mapped yet.

Mind that it is possible to do calculations with other weights, but the above are those in use at VMM.