noenandre

Replace sentinel value with an enumerator.

2

##### Issue type - Feature ##### Summary Replace XML_PARSER_DOM and XML_PARSER_SAX with an enumerator. If this is not a perfect use case for a enum class, I don't what is.

Replaced map layer from Norwegian Mapping Authority

2

Replace layer with id "kartverket-topo4", with a similar new layer which don't contain unlicensed data. See #1790