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#7243

Mike Gill responded
You raise some fundamental challenges here and ones not easily overcome. However, we are becoming better at modelling techniques that can interpolate or infer status and trends between sampling locations but also we can use these models to tell us where, in a priority fashion, we should put efforts to fill gaps. REmote sensing also plays a key role here but not to the point that we can no longer do ground observations – ground observations are essential.