A 1580 Map Shows Why Data Visualization Is Never Neutral

The 1580 Mapa de Teozacoalco was made by an unnamed Ñudzahui (Mixtec) painter in response to a Spanish royal request for information about the region’s terrain and settlements. It depicts roads, rivers, mountains, towns, and ruling families, combining Indigenous mapping traditions with visual conventions likely to be legible to Philip II and his officials. Its circular layout expresses the unity of the community, while a church icon marks Teozacoalco’s prominence. The map’s genealogies accurately record dynastic histories, but arrange family lines as separate vertical sequences even though Ñudzahui political relationships were interwoven through marriage and alliance.

The map demonstrates that visualizations are not neutral windows onto data: their design choices shape what viewers notice and understand. The painter adapted how he represented his people’s history for a Spanish audience, but did so amid colonial laws, extraction of Indigenous land, and epidemic disease. The map therefore served not only as a response to royal administration but also as an assertion of Ñudzahui sovereignty and enduring land claims. Its meaning depended both on the maker’s intentions and on the viewer’s cultural and political outlook; the king might have recognized its practical details while missing the significance of its Indigenous forms. The example argues that understanding any map or chart requires attention to who created it, for whom, and under what conditions. Recognizing those influences does not diminish visualization’s usefulness; it allows people to interpret and design it more responsibly.