Instrument · calibration
Node · envelope, buffer, quality
Site · outbox
governed data store · inbox, governed data
Consumer · product
4.56 °CGNSS ±1 µs · u ±0.15
flags none · aws-07
NOAA ISD · U.S. Government work
USGS NWIS · U.S. Government work
ECCC hydrometric · ECCC end-use licence
NEON · CC0 1.0
Argo floats · CC BY 4.0
AmeriFlux · CC BY 4.0
WRI power plants · CC BY 4.0
Sensor.Community · ODbL 1.0 · research only
INTERMAGNET · CC BY-NC 4.0 · research only
PSMSL tide gauges · Free with citation · research only
Derived product · 2 sources, 1 attribution line
Research · open
Commercial API · open
Enterprise · open
Government · open
Open release · open
NOAA ISD
ECCC hydrometric
USGS NWIS
Argo floats
P1 · gridded field · v1
P2 · index · v1
P3 · nowcast · v1
P4 · QC report · v1
P5 · composite · v1
P6 · index of indices · v1
API
Map
Export
Alerts
Canada
United States of America
Germany
Japan
Australia
Brazil
refused at the boundary
Sites
Governed products
API
Events
Maps
Export
Open release
Inbound management path · none
Alberta · 146 stations
Intro. Instrument · calibration; Node · envelope, buffer, quality; Site · outbox; governed data store · inbox, governed data; Consumer · product; 4.56 °CGNSS ±1 µs · u ±0.15flags none · aws-07
Data · Explainer
Every value leaves the instrument with its unit, time quality, quality flags and provenance, and keeps them all the way to your product. The licence of every source is carried through to every product, corrections flow downstream without deleting history, and residency is fixed by contract.
01 · Pipeline
An instrument measures with its identity and calibration. The node wraps the value in an observation envelope with time quality, buffers it when the link drops, measures quality and uncertainty, and publishes through a transactional outbox, delivered at least once. The inbox upstream deduplicates by event id, so a value lands once however often it is sent. Inject a fault and follow the packet.
Fault
instrument → node · calibration-recordnode → node · observationnode → node · event-envelopenode → node · quality-flagnode → site · event-envelopesite → data-store · observationdata-store → api-consumer · product-manifest{ "observationUni": "obs-1001", "systemUni": "aws-07", "observedProperty": "air_temperature", "phenomenonTime": "2026-10-28T05:14:18Z", "resultTime": "2026-10-28T05:14:18Z", "result": 4.56, "unit": "Cel", "uncertainty": { "u": 0.15, "k": 2 }, "qualityFlags": [], "timeQuality": { "source": "GNSS", "offsetBound": "±1 µs" }, "evidenceRefs": [ "cal-aws-07-r4" ], "schemaVersion": "1.0" } 02 · Licensing
A derived product carries the union of its inputs’ obligations and the intersection of their permissions. One non-commercial input closes the commercial tiers; one share-alike database fixes the licence of what is built from it; every attribution travels. Choose the sources a product draws on and see where it may go.
03 · Corrections
When a source corrects a value, the dependency graph is walked: every product that used it is marked stale, only those are recomputed, each gets a new version that names what it supersedes, and subscribers are told. Nothing is deleted; the old version stays readable with its correction state. Pick a source to correct.
Correct
source-steward → data-store · correction-noticedata-store → data-store · correction-noticedata-store → data-store · evidence-recorddata-store → api-consumer · product-manifest04 · Residency
The compiler evaluates data rights and locality before it places anything, and it is compute-to-data aware: when rows may not leave a region, the work travels to the data and only the permitted result comes back. Set the region, the requester and the request.
Data region
Requester in
Request
05 · Exchange
Governed products reach people and applications through versioned APIs, events, maps and exports. None of them opens an inbound management path into a site: requests stop at the governed product, and a map paint is bound to its product by a grounding receipt. Open release is one more channel, open only when the licence allows it.
Channel
06 · Requests
A request names a property, an area and a time window. The size of the answer follows from the stations inside the area, the window and the reporting interval; each observation comes back with its quality and provenance attached. The stations counted here are real surface weather stations.
Area
Interval
Form
GET /v1.1/Observations ?$filter=st_within(FeatureOfInterest/feature, geography'POLYGON((-120 49,-110 49,-110 60,-120 60,-120 49))') and ObservedProperty/name eq 'air_temperature' and phenomenonTime ge 2026-10-27T15:00:00Z and phenomenonTime lt 2026-10-28T05:00:00Z &$select=phenomenonTime,result,resultQuality &$top=2044
Every value leaves the instrument with its unit, time quality, quality flags and provenance, and keeps them all the way to your product. The licence of every source is carried through to every product, corrections flow downstream without deleting history, and residency is fixed by contract.
An instrument measures with its identity and calibration. The node wraps the value in an observation envelope with time quality, buffers it when the link drops, measures quality and uncertainty, and publishes through a transactional outbox, delivered at least once. The inbox upstream deduplicates by event id, so a value lands once however often it is sent. Inject a fault and follow the packet.
A derived product carries the union of its inputs’ obligations and the intersection of their permissions. One non-commercial input closes the commercial tiers; one share-alike database fixes the licence of what is built from it; every attribution travels. Choose the sources a product draws on and see where it may go.
When a source corrects a value, the dependency graph is walked: every product that used it is marked stale, only those are recomputed, each gets a new version that names what it supersedes, and subscribers are told. Nothing is deleted; the old version stays readable with its correction state. Pick a source to correct.
The compiler evaluates data rights and locality before it places anything, and it is compute-to-data aware: when rows may not leave a region, the work travels to the data and only the permitted result comes back. Set the region, the requester and the request.
Governed products reach people and applications through versioned APIs, events, maps and exports. None of them opens an inbound management path into a site: requests stop at the governed product, and a map paint is bound to its product by a grounding receipt. Open release is one more channel, open only when the licence allows it.
A request names a property, an area and a time window. The size of the answer follows from the stations inside the area, the window and the reporting interval; each observation comes back with its quality and provenance attached. The stations counted here are real surface weather stations.
Global Privacy Control detected. We have honored it as your request to opt out of the sale and sharing of your personal information and of targeted advertising.Signal Global Privacy Control détecté. Nous l'avons respecté comme une demande d'opposition à la vente et à la communication de vos renseignements personnels ainsi qu'à la publicité ciblée.
Cookie policyPolitique relative aux témoins Privacy policyPolitique de confidentialité Do Not Sell or Share My Personal InformationNe pas vendre ni communiquer mes renseignements personnels
Your browser sent a Global Privacy Control signal. We treat it as a refusal for the purposes marked below, and those switches stay off.Votre navigateur a envoyé un signal Global Privacy Control. Nous le traitons comme un refus pour les finalités indiquées ci-dessous, et ces interrupteurs restent désactivés.
Needed for the site to work, to keep you signed in, to protect it from attacks and to remember your privacy choices and the settings you pick. Always on.Nécessaires au fonctionnement du site, pour vous garder connecté, le protéger contre les attaques et retenir vos choix de confidentialité et les réglages que vous choisissez. Toujours actifs.
Remember optional settings beyond the ones you pick yourself. Off until you allow it.Retenir des réglages facultatifs autres que ceux que vous choisissez vous-même. Désactivés tant que vous ne les autorisez pas.
Count visits and see how pages are used, so we can improve the site. Off until you allow it.Compter les visites et voir comment les pages sont utilisées, afin d'améliorer le site. Désactivés tant que vous ne les autorisez pas.
Show videos, maps and live data layers from other providers. They receive your IP address and may set their own cookies. Off until you allow it, or load a single item once.Afficher des vidéos, des cartes et des couches de données en direct d'autres fournisseurs. Ceux-ci reçoivent votre adresse IP et peuvent déposer leurs propres témoins. Désactivés tant que vous ne les autorisez pas, ou chargez un seul élément une fois.
Measure campaigns and personalise advertising. We use none today. Off until you allow it, and refused when your browser sends Global Privacy Control.Mesurer les campagnes et personnaliser la publicité. Nous n'en utilisons aucun actuellement. Désactivés tant que vous ne les autorisez pas, et refusés lorsque votre navigateur transmet le signal Global Privacy Control.
Nexus Observatory Inc. keeps a record of each choice as proof: a random consent ID, the time, your region and the rules applied, the choices, the notice shown, the page, a shortened IP address, a one-way code of your browser type and, if you are signed in, your account. Records are kept while your choice applies and for 3 years after, then deleted.Nexus Observatory Inc. conserve un registre de chaque choix à titre de preuve : un identifiant de consentement aléatoire, l'heure, votre région et les règles appliquées, les choix, l'avis affiché, la page, une adresse IP abrégée, un code à sens unique du type de navigateur et, si vous êtes connecté, votre compte. Les registres sont conservés tant que votre choix s'applique et pendant 3 ans par la suite, puis supprimés.