Oh I see. I thought XYZ layers only went up to 19 but according to this (https://wiki.openstreetmap.org/wiki/Zoom_levels) that is clearly not the case. Tracking the issue here: https://github.com/jumpinjackie/mapguide-maestro/issues/95 - Jackie -- Sent from: http://osgeo-org.1560.x6.nabble.com/MapGuide-Users-f4182607.html