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Kartverket","license":"https://creativecommons.org/licenses/by/4.0/","source":"https://ws.geonorge.no/hoydedata/v1/punkt","sourceDocumentation":"https://ws.geonorge.no/hoydedata/v1/datakilder/dybdekurver","retrievedAt":"2026-10-20","datum":"Sjøkartnull (EPSG 9672), metres positive down","quality":"Interpolated from depth points/contours, not direct soundings. Grid spacing is not accuracy. No navigation use.","notes":["API states typical errors 0.1–3 m, potentially tens of metres at some locations.","Null means no accepted marine-depth sample, including land and other data sources.","No interpolation across cells containing null samples."]}