Modelled magnetic field from overhead power lines, against DSA's 0.4 µT investigation level

power_line_field15 felterIkke i demoen

Kilde: Approach model over NVE Nettanlegg overhead lines
Geografi: Adressepunktet
Regnes som foreldet etter: 60 døgn
Tilgang: Krever API-nøkkel med tilgang til seksjonen
Kontraktversjon: 1
I pakkene: models

Tilgjengelig med: kjøpt kvote eller avtalt plan (alle felt) · Priser

Hva dette ikke sier

Gjengitt ordrett fra seksjonens warnings-felt, slik API-et returnerer det. Vi oversetter dem ikke: en oversettelse ville vist noe annet enn det svaret ditt faktisk inneholder.

Estimate, not a measurement: the current on a line is not published and is unknown here. The field is computed for an ASSUMED load per voltage class (field_typical_ut for a typical annual mean, field_high_load_ut for a high load); the real field can be lower or higher, and only a measurement over time says what it is.
Method emf-flat3-v1: each NVE overhead line within 300 m is modelled as a balanced three-phase line with its conductors side by side at a typical height and spacing for its voltage class, and the field 1 m above ground at the address point's horizontal distance is computed with Biot-Savart (inputs lists every assumed spacing, height and current). The largest single-line figure is served; fields of separate lines are not added because their phases are unknown.
above_investigation_level_* compares the figure with 0.4 µT, the annual-mean level at which DSA asks for an investigation of measures when new homes, schools or kindergartens are planned near power lines. It is a planning trigger, not a health limit (the ICNIRP public reference level is 200 µT). A line of unknown voltage within 300 m leaves a false flag null.
The NVE dataset holds the regional and central grid: local distribution lines (22 kV and below), cables in the ground, transformers and wiring inside buildings are not included, and they are often the larger source indoors. lines_within_300m 0 means no mapped line within 300 m: the flags are false for the mapped lines and the field is null, not zero.
Licence: NVE Nettanlegg via Geonorge, NLOD. Attribution: NVE.
validation lists each figure the model is checked by, against the reference named in it. value null with status not_yet_computed means the check has not been run on the data yet; it is not a pass.

Felter

5 av 15 felter er verdifelter — de som avgjør om en post faktisk sier noe. Resten er kontekst: identifikatorer, koder og tidsstempler.

Felt	Type	Rolle
field_typical_ut	number \| null	verdi
field_high_load_ut	number \| null	verdi
above_investigation_level_typical	boolean \| null	verdi
above_investigation_level_high_load	boolean \| null	verdi
dominant_line_voltage_kv	number \| null	kontekst
dominant_line_distance_m	integer \| null (m)	kontekst
nearest_line_distance_m	integer \| null (m)	verdi
nearest_line_voltage_kv	number \| null	kontekst
lines_within_300m	integer \| null	kontekst
lines_unknown_voltage	integer \| null	kontekst
method	string \| null	kontekst
method_version	string \| null	kontekst
inputs	object \| null	kontekst
validation	array<object> \| null	kontekst
computed_at	string \| null	kontekst

Hent denne seksjonen

Send nøkkelen i X-API-Key-headeren. Seksjonen kan hentes med resten av adressen, eller alene med paginering.

curl --fail-with-body --silent --show-error \
  -H "X-API-Key: $APPROACH_API_KEY" \
  'https://api.approach.no/api/v1/addresses/285717643?include=power_line_field'

# paginert, én seksjon om gangen
curl --fail-with-body --silent --show-error \
  -H "X-API-Key: $APPROACH_API_KEY" \
  'https://api.approach.no/api/v1/addresses/285717643/sections/power_line_field?limit=25'

Hvorfor den ikke kan prøves her

Seksjonen er ikke en del av den offentlige demoprojeksjonen. Det er en lisens- og personvernavgjørelse, ikke et tegn på at dataene mangler: de serveres til kunder med tilgang til seksjonen.