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Estimate rare/scarce classification

Posted: Mon Mar 09, 2020 11:56 am
by AndyAmphlett
Tom,

Could you clarify how the 'estimate rare/scarce classification' query option works? It is under more options > attributes > estimate rare/scarce classification.

Thanks,

Andy.

Re: Estimate rare/scarce classification

Posted: Wed Mar 25, 2020 2:59 pm
by admin
Hi Andy,

I'd forgotten what it meant. The criteria aren't sophisticated:

Based on post-1987 occurrences in a county the species must have

'Rare'
fewer than 4 distinct hectads
and fewer than 4 distinct tetrads
and fewer than 4 distinct monads

'Scarce'
fewer than 11 distinct hectads
and fewer than 11 distinct tetrads
and fewer than 11 distinct monads

Re: Estimate rare/scarce classification

Posted: Wed Mar 25, 2020 5:45 pm
by AndyAmphlett
Tom,

Many thanks. I should have thought of that; it is the approach used in the spreadshet linked to via this Message Board post - viewtopic.php?f=1&t=155&p=1016&hilit=rpr#p1016. Having the steps of identifying taxa that match VC Rare and VC Scarce categories semi-automated, is very useful.

Andy.