🌍 Advanced Sentinel-2 Geospatial Dashboard

An interactive, multi-view web application for analyzing Sentinel-2 satellite imagery using the Google Earth Engine (GEE) API and a Node.js backend. This dashboard allows users to perform comparative analysis, visualize different spectral indices, and manage multiple data layers for various Kenyan counties.

✨ Features

• Multi-View Layout: Compare up to four different Sentinel-2 layers side-by-side.
• Dynamic Layer Management: Add, remove, and toggle visibility for multiple layers within each map view.
• Interactive Table of Contents: A dedicated control panel for each map view to manage layers and adjust parameters.
• Customizable Analysis: Select specific counties, years, and cloud cover percentages for tailored imagery.
• Advanced Visualizations:
  • True Color (B4, B3, B2) for natural-looking imagery.
  • False Color (B8, B4, B3) to highlight vegetation.
  • Agriculture (B11, B8, B2) for crop health monitoring.
  • Urban (B12, B11, B4) to distinguish urban areas.
  • NDVI (Normalized Difference Vegetation Index) for vegetation health analysis, with a custom, accurate color palette.
  • NDMI (Normalized Difference Moisture Index) for measuring water content.
• Synchronized Views: All map views are synchronized for a seamless comparative experience, with coordinated panning and zooming.
• Dynamic Legends: Legends are automatically generated and updated based on the selected analysis (e.g., NDVI, NDMI).

🚀 Getting Started

Follow these instructions to set up and run the project locally.

Prerequisites

• Node.js: Make sure you have Node.js and npm installed.
• Google Earth Engine Account: You need an active GEE account. If you don't have one, sign up here: GEE Sign Up.
• GEE Service Account: Create a service account to authenticate with the GEE API.
  1. Go to the Google Cloud Console.
  2. Create a new project.
  3. Navigate to IAM & Admin > Service Accounts.
  4. Create a new service account.
  5. Generate a new JSON key for the account and download it.
  6. Rename the downloaded JSON key file to key.json and place it in the root directory of this project.
  7. Authorize the service account: In the GEE Code Editor, share the projects/ee-celestakim019/assets/counties asset with your new service account email address, giving it Reader permissions.

Installation

1. Clone the repository:

   git clone [https://github.com/your-username/your-repo-name.git](https://github.com/your-username/your-repo-name.git)
   cd your-repo-name

2. Install the required Node.js packages:

   npm install express @google/earthengine

Usage

1. Start the Node.js server from the root directory:

   npm start

2. Open your web browser and navigate to http://localhost:3000.

The application will load, and you can begin exploring Sentinel-2 imagery by selecting your desired counties, years, and analysis types from the control panel.

📂 Project Structure