Minimal Number of Birding Sites Needed to Record Every Order?

Imagine a birding trip that would allow you to record at least one species from every taxonomic order – and that the trip included the least number of sites and required the least amount of time to complete. Clearly, certain countries will have to be in the itinerary (e.g., New Zealand, Madagascar) and the timing… Continue reading Minimal Number of Birding Sites Needed to Record Every Order?

eBird Species Cartogram for the United States

The previous post presented a cartogram for global eBird data by county. Here, we do the same for the States (and Washington D.C.). It is worth noting what the starting conditions are; that is, what base map will be used to generate the cartogram. I am using the WGS84 geographic coordinate system/projection, shown here without any morphing: A… Continue reading eBird Species Cartogram for the United States

Reshaping the World with eBird Data

Cartograms provide a pleasing way to present geographical data. The idea is to redraw a map so that the relative sizes of its units (e.g. countries, states, counties, etc.) correspond to some measured quantity. A common example is a cartogram of population by country, in which the relative sizes of China and India become exaggerated, while… Continue reading Reshaping the World with eBird Data