About this map

A layered, open-data view of Baltimore, Maryland. Toggle municipal boundaries, census-based demographics, and event data (crime, 911 calls, arrests, AI-curated news) and filter by timeframe from 1 month to 5 years.

Data sources

Crime, 911 calls, arrests
Baltimore Open Data (SODA API). Updated daily, ~2-day lag.
Census poverty, income, population
US Census ACS 5-year 2022, by tract. TIGERweb geometry.
Council district boundaries
Baltimore Open Data, ArcGIS FeatureServer.
School attendance zones
BCPSS attendance areas via Baltimore Open Data.
News events
Perplexity Sonar with citations, filtered to Baltimore Sun, Banner, WBAL, WJZ, WMAR, Fox45, Maryland Matters. Geocoded via OpenStreetMap Nominatim. AI summaries generated on demand via Lovable AI Gateway.
Base map
© OpenStreetMap contributors.

Caveats

Open Data event queries are capped at 5,000 rows for performance — for the longest windows, only the most recent matching records render.
News events are geocoded from the addresses Perplexity returns. Some land at neighborhood centroid only.
Citations are rendered as returned; we do not re-verify content.
Choropleth (poverty/income/population) is one-at-a-time so colors stay readable.

Tech

MapLibre GL JS · React · TanStack Start · Lovable Cloud (Postgres) · Perplexity Sonar · Lovable AI Gateway (Gemini). All sources are public, open data.