Layers
Drag ⠿ to reorder — the top of the list draws on top.
Tiles stream from the app’s own providers per zoom.
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Sign in to Stereogram Pro
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The Atlas has no account of its own, so it hands the selection over and
stops there. Stereogram Pro asks you to sign in — a project belongs to somebody's
account — and then asks which project these measurements should join: one you
already have, or a new one. Nothing is written until you choose. The source citation,
the confidence tier and the publisher's own field names travel with the rows.
The rows go from this tab straight to that one. Nothing is uploaded on the way.
Export selection
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Selection too large to export
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Every measurement carries its confidence and the basis for it. Citations live once per source, not once per row.
⚠
Check every measurement against its source
Read this before you use the data
Every measurement here was published by someone else. We convert the azimuths to one convention, reproject to WGS 84, normalize the location confidence, and cite the map each row came from. We have not re-measured or corrected anything.
Before you rely on a measurement, open its record and check the value against the original.
- Convention. An azimuth may be right-hand-rule strike, dip azimuth, or a digitized symbol rotation. We use whichever the source declares. If a source declares it wrongly, it stays wrong here.
- Position. The precision tier (solid GPS, ring digitized, dashed approximate) is the publisher's own figure, or our estimate from the map scale if they gave none. Where there is neither, it is unknown, not zero.
- Context. Map unit, formation and age come from the publisher's unit polygon. They carry that polygon's boundary uncertainty.
These notes ship with every export in README.txt. sources.csv has the citation for each map.
Reopen this any time from ⚠ Data caveats in the status bar.