%%
% Contour plot of the number of historical tracks per unit area in the
% whole event set. Units are number per year per one degree latitude
% square. Each track is counted only once in each lat-long box (whose
% resolution may be set in _params.m_ ), unless the track leaves the box
% and later re-enters it, in which case it is counted twice. (By extension,
% it is counted _n+1_ times if it re-enters the box _n_ times after its
% first encounter.) Note that all tracks that pass the filter used to
% create the synthetic events, and the best track filters specified in
% _params.m_ , are used.
%
% This routine uses MATLAB's mapping toolbox. Some of the properties of the
% map can be set in the _params.m_ file.