Description: Geographic boundaries of U.S. Postal Service five-digit ZIP Code areas from HERE, aligned to the street centerlines of the Q2 2018 HERE core map release.HERE (the company that now includes data products that were formerly branded as "Navteq") maintains several versions of postal code data. The version distributed by MassGIS is an extract of HERE's nationwide "Un-generalized, High Definition, with County" layer. Relative to HERE's standard Postal Code Boundaries product, a significant amount of line work was created for this HD version to better segregate delivery to adjacent ZIP codes. The HERE Map line work was still used as much as possible. Boundaries have increased detail to more closely reflect postal code delivery. In this HD version, multi-part ZIP Code boundaries are allowed more often, when needed to reflect non-contiguous postal delivery. This dataset displays water features on coastlines but does not include "holes" for inland water bodies, and includes ZIP Code boundaries split at County boundaries.The HERE Postal Code Boundaries product does not have void areas in postal coverage, even if such non-delivery areas exist in reality (such as a remote mountainous area). This is by design, for aesthetic purposes and to ensure that a postal code is assigned to all geographic areas.MassGIS made minor edits to a few ZIP Code boundaries in Boston based on address data from the city. MassGIS also projected the data into the Massachusetts State Plane Mainland coordinate system.In March 2024, MassGIS modified the boundaries for all ZIP Code areas in Boston based on the U.S. Postal Service's ZIP Code Look Up by Address website. MassGIS also added polygons for ZIP Codes 02199 and 02203.
Copyright Text: HERE created this product using its 2018 Q2 Map Content and recent United States Postal Service (USPS) source file. MassGIS receives quarterly updates from HERE.
Description: The following tables from the US Census Bureau were used to compile the updated 2020 EJ datalayer, released in November, 2022:Minority population:2020 Census Redistricting Data: Table P2: HISPANIC OR LATINO, AND NOT HISPANIC OR LATINO BY RACEpct_minority_P2 = ((Total pop P2_001N - Not Hispanic or Latino:Population of one race:White alone P2_005N) / Total P2_001N) * 100Median Household Income (block groups, municipalities and state)American Community Survey 2020 5-year estimates: Table B19013: MEDIAN HOUSEHOLD INCOME IN THE PAST 12 MONTHS (IN 2020 INFLATION-ADJUSTED DOLLARS)Limited English Households:American Community Survey 2020 5-year estimates: Table C16002: HOUSEHOLD LANGUAGE BY HOUSEHOLD LIMITED ENGLISH SPEAKING STATUSlimEngHH = Total:Spanish:limited English speaking household C16002_004E+ Total:Other Indo-European languages:limited English speaking household C16002_007E+ Total:Asian and Pacific Island languages:Limited English speaking household C16002_010E + Total:Other languages:Limited English speaking household C16002_013E) limEngHHpct = (limEngHH / TotalHH C16002_001E) * 100Additional data adjustments:1. Block groups with a total population of fewer than 50 were removed.2. 228 2020 block groups have no MHHI in 2020 ACS table.130 of these did have a value in the 2019 ACS table so the 2019 BG MHHIand PCT BG MHHI(so the 2019 value for MA MHHI is used) were transferred to 130 BGs in the 2020 update. Those BGs are coded with ‘1’ in BG_MHHI_is_2019 This leaves 96 block groups with an unknown and not substituted 2020 BG MHHI5 of these are in towns with a muni MHHI > 150% of the MA MHHI. These are not designated as EJ.43 of the remaining are designated as EJ with the M and/or E criteria16 of the remaining have a population in EJ group quarters > 50%16 of the remaining have a total population < 50This leaves 16 block groups that may be EJ for income but no data are available to determine this. These are coded as EJ = No and median_household_income= ‘U’.