Analysing mammal citizen science data – A response to Wheeler et al.

We carry out analyses of some parameters of the galactic spiral arms, in the currently available samples.We present a catalog of the observed pitch angle for each spiral arm in the Milky Way disk. For each long spiral arm in the Milky Way, we investigate for each individual arm its pitch angle, as measured through different methods (parallaxes, twin-tangent arm, kinematical, etc), and assess their answers.Second, we catalog recent advances in...