The star chart showed Earth commercial and exploration routes after the use of warp drive began. Sirius A was a destination on an exploration route. The chart was originally a drawing by Rick Sternbach that had been previously published in 1979 on page 77. In the "The Explored Galaxy" wall chart, Sirius was located between the Tholian Assembly and Romulus. Both were identified in DS9: "Call to Arms" as being located in the Alpha Quadrant.