The main purpose of these files was to produce graphics and analyses for my basic lectures on biogeography and plant community ecology. Some of these functions may be useful for other use as well. The main functions are:
I wanted to have maps with standard projections such as UTM for
smaller areas and Lambert Azimuthal Equal Area for wider
areas. Function projectedmap can be used to draw a projected map
that completely includes the given range of latitude and longitude,
and occpmap displays species occurrences in such maps as extracted
from Global Biodiversity Information Facility using
the spocc package.
Function walterplot draws simplified, colourful climatic diagrams
that are suitable for slides.
Function PEThorn calculates Potential Evapotranspiration from
monthly mean temperatures. It is more faithful to the original paper
than the implementation in the SPEI package, and includes some new
twists.