DistrictBuilder | The Free and Open Source Redistricting Tool
Check out winners of the #MapAcrossAmerica redistricting contest!
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We can build a better map
DistrictBuilder puts the power of drawing electoral maps in the hands of the people. Redistricting can be a transparent process that represents communities fairly and prevents gerrymandering.
DistrictBuilder is a
free
and
open source
redistricting tool.
Try it out
Accurate down to the block
DistrictBuilder’s software gives you access to the same block-level data used in legal redistricting plans — for free. Come to the table with electoral maps that better reflect local communities and lead to fair representation.
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Build beautiful maps
Rapidly draw visually engaging and informative maps in our modern interface.
Analyze your map
Evaluate population demographics and analyze with commmon redistricting metrics.
Engage your audience
Easily export your custom map and share in an article, on social media, or anywhere online.
Build your community with Organization Pages
Organizations give groups of concerned citizens, nonprofits, or redistricting commissions the tools to create their own community on DistrictBuilder and engage the public in the redistricting process. It’s a place to map collaboratively, highlight the group’s goals, showcase maps that the community has created, or display official proposed maps.
Create an organization
Redistricting resources and information
Explore questions of proportionality, competitiveness, contiguity, and more, as new legal decisions, public oversight, and technology change the criteria for drawing electoral districts.
How to Evaluate Your DistrictBuilder Map
We walk through the tools and metrics available in DistrictBuilder to evaluate your map
Getting Started with DistrictBuilder
Not sure where to begin? DistrictBuilder’s wiki has all the information you need to build your first map.
The Public Mapping Project: How Public Participation Can Revolutionalize Redistricting
Want to learn more about Public Mapping? The Public Mapping Project book shares lessons learned, the tech, and how to DIY redistricting.
Build the map that demands fair representation
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