Satellite-measured ground motion near the address (InSAR Norge)
ground_motion13 felterIkke i demoen
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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.
- One row summarising every InSAR persistent scatterer within 100 m of the address point, from all ascending and descending Sentinel-1 tracks that see it (dataset_count). min_los_velocity_mm_yr is the strongest movement away from the satellite and max_los_velocity_mm_yr the strongest toward it, in mm per year along the line of sight. measurement_from and measurement_to are the first and last radar acquisition of the dataset; a single point can lack some of them.
- Loaded kommune by kommune from NGU's query API (there is no national file to download), so the section has records only where a load has been run: GET /coverage, source ground_motion, lists the kommuner loaded and the date each one was completed. An address in a kommune that is not listed gets no record, and that says nothing about its ground.
- InSAR measures how far a radar reflector (a roof edge, a wall, a mast, a rock) moves toward or away from a satellite along its line of sight. It is not a survey of the building or the plot and it does not say the building moves; a reflector can move on its own.
- Velocities are relative to a local reference per ~5 x 5 km processing tile (NGU adjusts each tile so the peak of the velocity histogram is 0 mm/year): they show local differences, not absolute ground movement. Negative is away from the satellite. The vertical-equivalent figures divide the line-of-sight velocity by its upward component and so assume purely vertical movement; east-west or slope movement makes them wrong. Dense vegetation, farmland, snow and fast-moving ground give no points or false values.
- No scatterer within 100 m means the radar saw no stable reflector there (vegetation, water, shadow, a newly built house) or the area is not loaded yet (GET /coverage, source ground_motion). Absence is not stability.
- Licence: NLOD 2.0 (Norwegian Licence for Open Government Data), stated by NGU on https://insar.ngu.no/. The service contains modified Copernicus Sentinel data. Attribution: Geological Survey of Norway (NGU), InSAR Norway, with NORCE, NVE and the Norwegian Space Agency.
Felter
7 av 13 felter er verdifelter — de som avgjør om en post faktisk sier noe. Resten er kontekst: identifikatorer, koder og tidsstempler.
| Felt | Type | Rolle |
|---|---|---|
| scatterer_count_100m | integer | null | verdi |
| scatterer_count_50m | integer | null | kontekst |
| nearest_distance_m | integer | null (m) | verdi |
| dataset_count | integer | null | kontekst |
| median_los_velocity_mm_yr | number | null | verdi |
| min_los_velocity_mm_yr | number | null | verdi |
| max_los_velocity_mm_yr | number | null | verdi |
| median_vertical_equivalent_mm_yr | number | null | verdi |
| most_negative_vertical_equivalent_mm_yr | number | null | verdi |
| measurement_from | date | null | kontekst |
| measurement_to | date | null | kontekst |
| release | string | null | kontekst |
| updated_at | timestamp | 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=ground_motion' # 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/ground_motion?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.