[Tutor] how to analyze thresholded features in an array

[jimmah9]

I have an array of numerical values (surface pressure on a lat/lon grid).
Using a constant threshold value I'd like to determine the maximum
dimension of each thresholded feature in the array. I've made a mask with
the thresholded value. Any guidance on how to define a feature and
determine geometric properties of each feature? Thanks in advance.