These are interactive maps of the Galactic Disk. Both above, in between, and below the maps you can find a number of clickable boxes that switch on and off layers on top of the background image. The available layers include:

• image - shows a background image of the Galactic Disk (360 > l > 290)
• equatorial coords - plots a grid of RA/Dec coordinates
• galactic coords - plots a grid of l and b coordinates
• OGLE-IV fields - shows the OGLE-IV field locations
• fill - switches on/off the field filling
• numbers - shows the assigned numbers to the OGLE-IV fields
• Bulge fields - shows OGLE-IV fields in the campaign toward the Galactic Bulge