Changes

[[File:Portland3HullsLowest.png|right|300px]] An obvious alternative approach is to use the first time (lowest level) that there are three hulls. There is a big difference in the layer numbers for this. See the queries below. Essentially, the HCA algorithm often takes an original hull apart and then takes the resulting hulls apart, giving a quadratic for hull count again layer. But, as is apparent in the image, this leads to big areas that would only be good for overlap analysis and not for identifying individual clusters.

--Lowest,highest, and lowest-highest, and first-after-peak level where there are three hulls

print myDict["Houston_TX"];

[-95.836717, -95.014608, 29.515925, 30.155908]

===Image Analysis===