At Statehill incorporating visualizations is a central component in everything we do. When you’re on the go, visual content is important—data visualizations make data less boring, less intimidating, and less complex, not to mention humans process and retain visual data faster than text. Today we are excited to present our most recent visual addition, roll call voting maps.

Roll call voting maps introduce a new dimension to roll call voting. Following a critical vote you can consult the map and view exactly where the yeas and nays stand geographically. By displaying voting data geographically you can more easily distinguish relationships and patterns between rural and urban districts, political coalitions, party politics, or any outliers that may be present.

Through the utilization of open legislative district data from the United States Census Bureau, converted to GeoJSON, and our own voting data, we were able to render the polygons accurately on a map with Leaflet.

Montana 64th session HB158 third reading in the house Montana 64th session third reading vote on HB158 in the house