Home Owner Loan Corporation (HOLC) ... - Historical HOLC neighborhood ratings (A, B, C, D) mapped to 2020 census tracts
Data Dictionary
Column | Type | Label | Description |
---|---|---|---|
geoid20 | text | 2020 census tract FIPS codes | |
class1 | text | HOLC grade covering the most area | HOLC letter grade of the HOLC-rated polygon that covers the largest proportion of the census tract's HOLC-rated area, e.g., A. |
class1_lbl | text | Text label for class1 | Text label for class1, e.g., "Mainly A" |
class2 | text | HOLC grade covering the most and second most area | HOLC letter grade of the HOLC-rated polygon that covers the largest and second largest proportion of the census tract's HOLC-rated area, e.g., A-B, where A covers the largest proportion of rated area, and B covers the second largest proportion of rated area. |
class2_lbl | text | Text label for class2 | Text label for class2, e.g., "Mainly A, some B" |
class2_red | text | Simplified 10-level version of class 2 | Simplified 10-level version of class 2 that combines relatively rare rating combinations. For example "Mainly C, some A" and "Mainly D, some A" were combined into "Mainly C or D, some A". |
class3 | text | Ratings covering the most, second and third most area, e.g., "A-B-D" | HOLC letter grade of the HOLC-rated polygon that covers the largest, second, and third largest proportion of the census tract's HOLC-rated area, e.g., A-B-D, where A covers the largest proportion of rated area, B covers the second largest proportion of rated area, and D covers the third largest proportion of HOLC-rated area. |
class3_lbl | text | Text label for class3, e.g., "Mainly A, some B, some D" | Text label for class3, e.g., "Mainly A, some B, some D" |
area_total | numeric | Total tract area not covered by water | Calculated as the area of the 2020 TIGER/Line census tract polygon that is not covered by water. Water coverage is obtained from 2020 TIGER/Line water shapefiles. |
area_rated | numeric | Percentage of non-water area covered by A, B, C, or D rated area | |
area_U | numeric | Percentage of non-water area covered by unrated rated area | |
area_A | numeric | Percentage of non-water area covered by A rated area | |
area_B | numeric | Percentage of non-water area covered by B rated area | |
area_C | numeric | Percentage of non-water area covered by C rated area | |
area_D | numeric | Percentage of non-water area covered by D rated area |