Extinction maps of Nessie derived using the NIR data of the VVV survey (top), MIR data of the Spitzer Space Telescope (center) and their combination (bottom). The black areas indicate regions of bright MIR emission that hampers extinction mapping. The red rectangle marks the area used for estimating the reference colors for the NICER method. The white circle marks the high-extinction region used to estimate the MIR foreground emission.