How Substralis reads the grid.

Every figure comes from a grid operator, a regulator or an official register. We don't model, interpolate, smooth or fill gaps. If Statnett publishes no headroom for a station, the station has no headroom figure in Substralis.

A figure that isn't published is drawn as not published: dark on the map, a dash in a table. It never becomes 0, “free” or an average of its neighbours. Where an operator publishes zero or less, we show exactly that.

• Room published
• Queue, no room published
• Operator says full
• Nothing published

Each value is stored as a claim: the source, the publisher's own date for it, and a fingerprint of the published content. Reading an unchanged source again creates no new claim, so a change in Substralis means a change at the source.

The small chip next to a figure names its source. Click it to see who published the figure, under what licence, how often we read it and when we last did; the sources page lists them all.

MVA stays MVA and is never ranked against MW. A forecast stays a forecast, with its year and scenario. Demand and production are listed side by side and never added together. National queue totals aren't shown, because the same project can appear in more than one register.

• Reserved
• Waiting in the queue
• Production

Room at a distribution substation means little if the transmission station above it is full or has a long queue. Substralis links each substation to the station it depends on, and says how the link is known:

A long queue upstream is shown next to a substation's room. It is never subtracted from it: operators don't publish how the two interact.

Each source is read on its own timetable. Each figure keeps the date its publisher gives it; where a publisher gives none, the date we read it. A source that stops answering is flagged on the status page, not silently carried forward.

Each market publishes a different kind of figure, and Substralis keeps them apart rather than forcing one scale on all of them:

• Norway: headroom at substations, and every case in Statnett's queue.
• Denmark: headroom at substations.
• Sweden: county capacity to 2035, and connection bands at stations.
• Finland: headroom at substations, and main-grid capacity by year.
• Great Britain: headroom at substations, and the connection registers.
• Netherlands: offtake status per feeding area.
• Germany: forward connection bands at transmission stations.
• Ireland: headroom at distribution nodes, in MVA.
• France: offtake capacity per RTE consumption zone.

We don't invent queue positions an operator doesn't publish, we don't guess customer identities beyond what is registered, and we don't sell data. A published capacity figure is the operator's own disclosure, not an offer: connections are offered only by the grid operator, through its own process.