One prompt converts Lego's 70MB map PDF to CSV, enabling custom tile-built heatmaps
m4rkmc · x · 2026-11-13
m4rkmc tried for two years to get a model to turn the 70MB PDF of Lego's iconic colour world map instructions into a CSV. Hydrogen did it on the first try with a single prompt, putting the map into a spreadsheet.
He then reused the workflow to generate a heatmap of world flight routes, output as a PDF with numbered, colour-coded panels (10 density buckets, 0 to 4,095+ routes per cell) so it can be built tile-by-tile like actual Lego instructions.
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