Big Picture's export is a spreadsheet, so its example is a kind:'table' excerpt (sr): the six largest
groups by population, of 2,107, with the live table's own column keys (dashboard.people_group,
.country, .region, .population), so the popup header and the table's header cannot drift.
Cost, measured: those keys bring the 'dashboard' area into the gallery bundle, which grows from
369,635 to 420,172 bytes (123,536 to 136,998 gzipped, +13.5 KB). The alternative, header keys
duplicated into 'mapInfo' in eleven locales, is a translation job for after the demo.
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