Exploring the third dimension in Herschel and Planck maps
Herschel and Planck are providing detailed maps of dust emission from the Milky Way. In the Galactic plane this emission is the sum of a number of different components along the line of sight, often with very different physical conditions. I will show one way that the Planck collaboration has tackled this issue, using gas kinematic tracers to probe ISM properties as a function of Galactocentric radius. In addition, I will highlight another promising route, particularly well adapted to results from the Hi-GAL survey, using a three dimensional extinction technique.