Example of corrections applied to model in order to recover a sample with a distance distribution similar to APOGEE data in a given field. Top panel: distance distribution for the field centred around l = 15, b = 0, for the model (left panel), APOGEE DR13 (middle panel) and the model with the APOGEE distance distribution function (DDF) applied (right panel). Bottom panel: MDF from the model (left), from APOGEE DR13 (middle) and for the model with the APOGEE distance distribution function applied (right). We see that by applying the APOGEE distance distribution to the model, we recover an MDF which better reproduces the data.