Our data

Drawn from the record, not from a template

Every Earth That Day print begins with the archived weather and satellite record for the date and place you choose. We do not keep a library of pretty maps to drop a name onto. We go to the record, and we draw what it says.

What we use

Surface wind, sea-level pressure, cloud cover, rainfall, snow cover and sea ice, recorded four times a day, on a global grid, continuously since 1948. It is the same public archive that weather researchers rely on, and it is why any date from then on is available to us.

What the print is

The wind and weather prints are direct drawings of that data: the streamlines follow the actual wind, the isobars are the actual pressure lines. The Earth print is our artistic impression of the satellite and weather data — the real cloud, snow and ice for that day, painted onto the planet and lit by where the sun actually was at that hour.

What we will not do

We will not invent a day. If a date sits before the record, we say so rather than guess. We do not use stock imagery, and we do not claim a photograph where there is not one.