No zone or band means the point is outside the mapped roads' noise zones; roads below the maps' traffic thresholds are not mapped. The zone map and the strategic map use different methods and can disagree.
The point is below the marine limit, where marine clay (and possibly quick clay) can occur. Radon level is a screening classification; only a measurement gives the indoor radon level.
Ground rule: Navigate with HTML GET links to keep explanations and relationships. Use the page's JSON alternative only when concrete values must be extracted, compared or computed.
How to use the combined place page
Confirm the place with the Geonorge section. The coordinate is the linking key for the rest of the page.
Read the availability status per source. "Unavailable" is not the same as "no results".
Follow a concrete result onward to a vessel, port, aquaculture site or air station when more detail is needed.