EV Charging Stations Visualization

Interactive geospatial analysis of U.S. electric vehicle charging infrastructure using R, Leaflet, Shiny, and dplyr. The visualizations feature a comprehensive multi-state dashboard and a focused Connecticut case study with data cleaning, reactive programming, and web deployment.

Contents

1. Overview
2. Project Files
3. Key Features
4. Quick Start

Overview

This project transforms raw EV charging station data into interactive web visualizations, showcasing both a focused state-level map (Connecticut) and a comprehensive national dashboard that reveal geographic distribution patterns and network provider coverage.

Project Files

• leaflet.R: Script containing data preprocessing and Connecticut-focused Level 3 charging station analysis
• ct_ev_stations.html: Standalone interactive map widget
• app.R: Script implementing a multi-state interactive dashboard with filtering controls
  • The app can be accessed at https://felice797.shinyapps.io/hw5_ev_shiny/

Key Features

• Data Preprocessing: Cleaning of messy real-world dataset with missing values and encoding issues
• Proportional Symbol Mapping: Marker sizes dynamically reflect charging capacity (Level 2 + Level 3 ports)
• Multi-State Analysis: Dropdown selection for all U.S. states with EV infrastructure (Shiny app)
• Temporal Filtering: Date range picker for analyzing infrastructure growth over time
• Dynamic Network Selection: Checkboxes with select all/clear all functionality for charging network providers
• Charging Level Toggle: Radio buttons to switch between Level 2 and Level 3 charging analysis
• Responsive Filtering: State selection dynamically updates available network options
• Interactive Elements: Click-through popups with detailed station information and network filtering
• Responsive Design: Cross-platform compatibility (desktop/mobile)

Quick Start

Prerequisites: R with leaflet, dplyr, shiny, htmlwidgets

# Generate static interactive map
source("leaflet.R")

# Launch interactive Shiny dashboard
shiny::runApp("app.R")

# View standalone map widget
# Open ct_ev_stations.html in browser