Found an interesting set of data via Alexandre Afonso’s blog, called the Chapel Hill Expert Survey which “estimate[s] party positioning on European integration, ideology and policy issues for national parties in a variety of European countries. Questions on parties’ general position on European integration, several EU policies, general left/right, economic left/right, and social left/right are common to all surveys.” It has data for various years in the 1999-2017 period, and below are the various political families* mapped on the political compass:
Made with python / matplotlib and assembled in GIMP.
*) – According to the explanations, political family here is not the EP Group or the Europarty but: “classification is primarily based on Hix and Lord (1997), except that we place confessional and agrarian parties in separate categories. Family association for parties in Central/Eastern Europe is based primarily on Derksen classification (now incorporated in Wikipedia), triangulated by a) membership or affiliation with international and EU party associations, and b) self-identification”.