This app was created by Sharon Machlis using the R programming language and shiny R Web framework.
Data come from the Massachusetts Legislature's Special Joint Committee on Redistricting and the U.S. Census Bureau. Proposed new district assignments are determined by finding the address's Census block and then referring to the official spreadsheet of Census block district assignments.
R packages used in this app include shiny, leaflet, leaflet.extras, censusxy, glue, and tidycensus.