Page 1 of 1

Searching for null monads

Posted: Sun Jun 27, 2021 9:22 pm
by jdsh
I'd like to make a list of monads with no records for my county. This query ... 6381d81b6e should do it for a specific hectad (just using that for testing so that it runs faster), but the DDb doesn't return monads with zero taxa recorded. I may be missing something or it may not have been built in, or possibly not thought to be wanted.


Re: Searching for null monads

Posted: Sun Jul 04, 2021 6:01 pm
by AndyAmphlett

This query was raised some years ago - viewtopic.php?f=1&t=204&p=538&hilit=null#p538 - but the link to the DDb query doesn't seem to work any more. I have re-created it for Cambridgeshire (finding monads with no records since 2000) - ... 36fcfd8607. The null monads won't map though.