The UCI have brought out a new system of points and rankings for 2015. The main ranking is the “UCI World Classification”, a rolling ranking of riders of all categories based on performances over the previous 52 weeks as opposed to each season or calendar year. Within this there are big changes to the allocation of points across races, for example all three grand tours are now treated equally.
All this is buried in a PDF listing modifications to the rulebook but below is a summary of the changes along with the new points scales.
Update Sunday 25 January: the UCI has scrapped the introduction of this scheme for 2015 following protests by teams upset at the sudden introduction. It should be back for 2016 but until then the old system applies: calendar year, more points for the Tour de France etc.