📊 TN 2026 — Village Heatmap

📊 Data Coverage & Limitations

Constituency Coverage

We have Form20 (official election results) data for 218 out of 234 Assembly Constituencies (93.2%).

Missing 16 ACs (no Form20 data available):

• AC147 — Perambalur region
• AC151–AC159 — Cuddalore/Ariyalur region (9 ACs)
• AC178–AC183 — Thanjavur/Pudukkottai region (6 ACs)

Vote Coverage

• 50,337,109 registered electors across 218 ACs
• 4,26,62,846 (4.27 Cr) valid votes from station-level Form20 data
• 71,639 polling stations with candidate-wise vote breakdowns
• Approx voter turnout: ~74.3% across covered ACs

Village-Level Mapping

• 9,809 village polygons from Survey of India boundary data
• Votes distributed from polling stations to villages via name-matching
• 45,193 of 68,890 stations matched to village names directly
• Remaining stations: no village name match (urban areas, mismatches)
• Village vote counts are estimates, not official figures

Key Limitations

• 16 ACs have zero vote data — these appear as grey/empty on the heatmap
• Village boundaries are approximate and may not align perfectly with booth areas
• One station may serve multiple villages; votes are assigned to the matched village only
• Candidate names are from Form20 PDFs and may have minor spelling variations
• AC boundaries are dissolved from village polygons, not official delimitation boundaries

Data sources: ECI Form20 PDFs, Survey of India village boundaries, Booth-level mapping data.