862.1 nm DIB carrier volume density (left) and extinction volume density (right) in the plane parallel to the Galactic plane and containing the Sun. Coordinates are in parsec from the Sun location. The Galactic Center is to the right and the longitude increases anti-clockwise. Dashed lines are iso-galactocentric distances spaced by 1000 pc. The central line corresponds to the Sun location and X = 0. Black and white coded regions correspond to those with low target densities and more uncertain measurements.