How the atlas joins across grains. Each file states its method, and each row carries a share. The method and the error of each are written out under Methods.
| File | Joins | Method |
|---|---|---|
point_to_feeder.csv | facility or charger → circuit | nearest circuit geometry, distance recorded |
feeder_to_tract.csv | circuit → tract | one sample every 25 m of circuit |
tract2010_to_tract2020.csv | 2010 tract → 2020 tract | Census 2020 relationship file, land area |
zip_to_tract.csv | ZIP → tract | Census 2020 relationship file, land area |
municipality_to_tract.csv | municipality → tract | ~150 m area lattice |
The two Census relationship files they are built from, filtered to Massachusetts, are in census/.