Downloads
.zip file (2.8 MB), with ESRI Shapefiles (arc and polygon) and ArcMap layer file (.lyr)
Overview
Staff at the Massachusetts General Court Special Joint Committee on Redistricting developed this layer. Governor Baker signed the new districts into law on November 22, 2021, with Chapter 93 of the Acts of 2021.
The name of the statewide datalayers are CONGRESSMA118_POLY (polygons) and CONGRESSMA118_ARC (linear features).
Production
MassGIS downloaded the data from the Joint Committee on Redistricting website and incorporated a coastline into the polygons using 2020 TIGER/Line "faces" data downloaded from the U.S. Census Bureau. MassGIS converted the polygons to linear features to produce the _ARC feature class and added attributes to both feature classes.
The data layers are based upon 2020 U.S. Census geography and therefore will not perfectly align to MassGIS's Municipalities layer (nor any others based on it).
Attributes
The CONGRESSMA118_POLY attribute table has the following fields:
| Field Name | Width / Type | Description |
|---|---|---|
| DIST_NUM | 2 / I | Unique number for each district |
| DISTRICT | 50 / C | District name |
| REP_FIRST | 16 / C | First name of representative |
| REP_LAST | 16 / C | Last name of representative |
| REP_PARTY | 1 / C | Political party of representative |
| REP | 25 / C | Rep.'s full name and party |
| URL | 50 / C | Web address for Representative |
| DISTRICT | 3 / I | Meeting number of the current Congress (116) |
In the CONGRESSMA118_ARC attribute table, the field OUTLINE is coded as follows:
- 0 = internal district boundaries
- 1 = state
- 2 = coastline
Maintenance
MassGIS maintains the layer and will make updates as needed.
Member names from the results of the November 2022 election were entered in January 2023. Coastal boundaries were updated at the same time.
Also see the state House and Senate data layers.
Additional information, file formats, and PDF maps can be found on the Joint Committee on Redistricting website.