Performs convex hull area calculation from coordinate sets on the Earth's surface
- Longitudinal coordinates of occurrences in decimal degrees
- Latitudinal coordinates of occurrences in decimal degrees
Uses the cylindrical equal area projection in order to check if the minimum convex hull wraps around the prime meridian
Returns the convex hull area is square kilometers
Relies on the 'sp' package for the Polygon and chull function. Assumes latitude and longitude coordinates use the WGS84 datum
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