LonKin method applied to the mock catalogues without warp (dotted lines), with the SineLop warp (dashed lines) and with the SLop warp (solid lines) models, including extinction, Gaia selection function, and Gaia DR2 errors. The line shows the median of the particles in bins of 20° and the error bars show the lower and upper 1σ uncertainty in the position of the median and they include in quadrature the uncertainty in the solar velocity.