About This Dashboard

The Problem

The Arkansas Commissioner of State Lands (COSL) manages over 100,000 tax-delinquent parcels across all 75 counties. Currently, this data is only accessible through a basic search interface on cosl.org -- one parcel at a time, with no analytics, no maps, and no trend tracking.

What This Dashboard Does

• Aggregates all 107,977 delinquent parcels into a single searchable interface
• Provides county-level analytics (parcel counts, amounts due, year trends)
• Interactive choropleth map showing delinquency hotspots
• Individual parcel detail pages with GIS mapping via the Arkansas GIS Office API
• Full-text search across owner names, parcel numbers, and legal descriptions

Data Sources

• cosl.org -- Parcel search API (all delinquent parcel data)
• Arkansas GIS Office -- Parcel polygon boundaries (ArcGIS REST API)
• COSL County Reports -- Historical tax turnback and deed reports

Technical Approach

Data was collected through a two-phase scraping process: first collecting all unique parcel IDs across 75 counties, then fetching detail pages for each of the ~108K parcels. The dashboard is built with Next.js, TypeScript, Tailwind CSS, Recharts, and MapLibre GL JS. GIS data is fetched on-demand from the Arkansas GIS Office API.

Future Enhancements

• Weekly diff tracking to monitor redemptions and new certifications
• Historical trend backfill from COSL County Reports (2013-2026)
• Postgres migration for faster search and real-time analytics
• Batch geocoding for all parcels to enable full point-level mapping