Data

Downloads and data

The map, the reference pages, the PDF and the workbook are all generated from one data file, so the counts never disagree. Version 1.4.2, data version 2026.09.14, generated 2026-09-14, current through 5 September 2026.

PDFPDF referenceLetter size. The same text as the reference pages: reading the map, the history era by era, Morrisound, Death, the seven cases, cities, institutions, network metrics, method, source register and index of nodes. ExcelNode and edge datasetRead me, Nodes (with person class, hub region, place year basis, Morrisound flag, confidence, sources and metrics), Edges, Morrisound credits, Personnel moves, Cities with formulas, source register and data dictionary. JSONdata.jsonThe single source: nodes, edges, sources, release and data version, cutoff, and the world outline used by the Cities view.

What is in the data

371 nodes of three kinds: 204 bands, 106 people and 61 institutions (studios, labels, festivals, venues, media and networks), each assigned to one of twelve lineages and, where a place is recorded, to one of sixteen hub regions or to a Florida, city not recorded, or No fixed place cluster. 1130 directed edges of fourteen types: member of, founded, moved to, spawned, became, side project, produced, worked at, recorded at, label, festival or venue or tour, collaboration, guest support and influenced. Every node carries a confidence grade (High, Medium or Low), source ids, a status as of the cutoff date, a place year with its basis, and computed metrics: degree, distinct neighbors, betweenness on the full graph and betweenness on the people and production graph. People carry a relationship class: personnel connector, founding or core member, institutional connector or guest support performer. Bands carry a Morrisound flag: tracked where at least one full album was recorded in the room, partial where a record was mixed or mastered there only or a producer credit was made elsewhere.

The source register holds 238 sources (4 book, 28 database, 18 official, 94 press, 93 reference, 1 scholarly), cited by id beside claims in the reference, in the node entries and in the Sources column of the workbook. The rules for inclusion, timeline placement, hub regions and the people on the map are set out in Reading the map; the evidence standard and the open items are in Method.

Citing

The Music Cities™, Tampa Death Metal Family Tree, version 1.4.2, data current through 5 September 2026, tampa.themusiccities.com. Node and edge counts are as of that version; later versions are stamped in the footer of every page and in data.json.

Corrections

Anything wrong, missing or out of date can be reported on the Corrections page, with a public source or an artist authorized statement. Submissions are checked before anything changes and changes ship in the next release.