Thank you @robbieonsea. I did not notice that they had switched X and Y at Kartverket, and for sure I was not able to figure out name="switch-xy">TRUE. This works very well. Thank you one more time.
Norwegian maps from "Statens Kartverk" has changed the service on there site (see Kartverket) I do not fully understand how to change: <object class="VikSlippyMapSource"> <property name="label">Statkart topo</property> <property name="hostname">opencache.statkart.no</property> <property name="url">/gatekeeper/gk/gk.open_gmaps?layers=topo4&zoom=%d&x=%d&y=%d</property> <property name="copyright">© Kartverket</property> <property name="license">Kartverket Terms of Use, creative commons by...