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Tools | Generate sites x species matrix from survey points #704

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
It would appear that we have a range of systematic survey sites in the ALA, 
some from NSW tree surveys with additions at least in SE NSW from a range of 
other agencies including CSIRO.

Tools | points to grid generates a sites x species matrix but is applicable for 
'presence-only' observations. Systematic survey sites require the generation of 
a direct (survey) sites x species matrix or what Mike Austin refers to as a 
co-occurrence matrix. 

For this to occur our records must identify all survey sites where all  species 
in a 'category' were observed (e.g., trees, birds, grasses). This will imply a 
heap of absences. 

See #703

Original issue reported on code.google.com by leebel...@gmail.com on 16 Jun 2014 at 5:30