AnomCity.AI: A Smart City Anomaly Detection Platform with Multi-source Data Fusion

Project Basic Info

• Author/Maintainer: solasas
• Source: GitHub (link: https://github.com/solasas/AnomCity.AI)
• Release Time: 2026-06-16

Core Purpose AnomCity.AI is an AI-driven smart city monitoring platform designed to solve the data silo problem in traditional city management. It integrates multi-source data streams (traffic, weather, crime, air quality, etc.) and applies integrated machine learning to detect cross-domain anomaly patterns in real time, providing data-driven decision support for smart city management.

Key Features

• Multi-source data fusion across different urban domains
• Real-time cross-domain anomaly detection using integrated ML
• Interactive visualization dashboard built with React
• High-performance backend via FastAPI for concurrent request handling

Traditional city management systems face a critical challenge: data from different departments (traffic, crime, weather, air quality) are scattered and isolated, making it hard to form a unified situational awareness. For example, traffic congestion data may not be linked to weather conditions or crime incidents, leading to incomplete decision-making. AnomCity.AI targets this problem by breaking down data silos and enabling cross-domain data integration.

Data Collection & Cleaning

• Data Source: Open data portals (e.g., Chicago's Socrata API for crime data)
• Collection Strategy: Pagination for large datasets (e.g., 2022-2023 Chicago crime data, ~300k records/year)
• Cleaning Steps:

1. Integrity check (shape, columns, data types)
2. Missing value analysis (e.g., 1,939 records with missing location info)
3. Time filtering (e.g., 2023 data selection)
4. Persistence (save as CSV for further processing)

Backend: FastAPI

• Async framework for high concurrency, critical for real-time monitoring
• Core functions: Data API exposure, anomaly detection (integrated ML), result aggregation

Frontend: React

• Component-based interactive dashboard
• Visualizations: Time series charts, heatmaps, alert lists

Data Pipeline explore_crimes.py → crime_clean.csv → FastAPI backend → React dashboard

Cross-domain Data Fusion Traditional systems focus on single data sources, missing cross-domain correlations. AnomCity.AI uses integrated learning to fuse multi-domain features, enabling detection of complex anomalies like:

• Traffic congestion + weather anomalies (normal vs abnormal congestion under bad weather)
• Crime rate spike in specific time windows
• Spatial patterns of air quality anomalies

Real-time Requirement City anomalies lose value quickly (e.g., 30min delay in traffic anomaly detection reduces intervention effectiveness). FastAPI's async design ensures low-latency data processing and detection, meeting real-time needs.

Public Safety Optimize police patrol routes by analyzing crime data's spatiotemporal patterns (e.g., deploy police forces in high-risk areas).

Traffic Management Distinguish between explainable congestion (e.g., heavy rain) and abnormal congestion (e.g., accidents) for targeted interventions.

Environment Monitoring Early detection of air quality anomalies (e.g., industrial emissions, wildfire smoke) to trigger alerts.

Emergency Response Comprehensive data support during disasters (e.g., earthquake: traffic disruption, communication failure, medical resource demand) to aid rescue decisions.

1. Multi-city Expansion: Adapt to other cities' open data APIs for cross-city anomaly detection networks.
2. Prediction Enhancement: Add time series models to predict upcoming anomalies (early warning).
3. Causal Inference: Integrate methods to identify anomaly root causes and recommend interventions.
4. Edge Computing: Deploy part of detection logic to edge nodes for ultra-low latency scenarios (e.g., autonomous driving safety alerts).

Key Success Factors

• Cross-domain perspective: Breaking data silos is essential to unlock urban data value.
• Open data utilization: Reduces data acquisition costs and enables scalability.

Insights from the Tech Stack FastAPI + React balances development efficiency, performance, and maintainability, suitable for small-to-medium teams to iterate smart city applications quickly.

Overall Value AnomCity.AI provides a practical example of combining open data, ML, and modern web tech to build useful urban governance tools.