Left: K-band stellar density of the entire field studied (same scale as in Fig. 2). Clusters in this image appear as point sources and are labeled. The half ellipse marks an extended stellar overdensity corresponding to the Sagittarius Dwarf galaxy. Right: error map of the Nicer extinction map. The average error in the map is A_K ~ 0.02 mag. The marked error peaks are caused by very bright, saturated, red giants that create a no-data region. The maximum error towards the densest regions of the cloud is A_K ~ 0.06 mag.