# Component Relationship Diagram

```mermaid
graph TD
    subgraph "External"
        Client[HTTP Clients]
        GoogleMaps[Google Maps API]
        PG[(PostgreSQL)]
        FS[File System]
    end

    subgraph "SatelliteProvider"
        WebApi[WebApi<br/>Program.cs endpoints]
        Route[RouteManagement<br/>RouteService + RouteProcessingService]
        Region[RegionProcessing<br/>RegionService + Queue + Workers]
        Tile[TileDownloader<br/>GoogleMapsDownloaderV2 + TileService]
        DA[DataAccess<br/>Repositories + Migrations]
        Common[Common<br/>DTOs + Interfaces + Configs + GeoUtils]
    end

    Client -->|HTTP| WebApi
    WebApi --> Route
    WebApi --> Region
    WebApi --> Tile
    Route --> Region
    Route --> DA
    Region --> Tile
    Region --> DA
    Tile --> DA
    Tile -->|HTTPS| GoogleMaps
    Tile --> FS
    Region --> FS
    Route --> FS
    DA --> PG
    WebApi --> DA
    WebApi --> Common
    Route --> Common
    Region --> Common
    Tile --> Common
    DA --> Common
```

## Component Summary

| # | Component | Project(s) | Responsibility |
|---|-----------|-----------|---------------|
| 1 | Common | SatelliteProvider.Common | Shared DTOs, interfaces, configs, GeoUtils |
| 2 | DataAccess | SatelliteProvider.DataAccess | Database entities, Dapper repositories, DbUp migrations |
| 3 | TileDownloader | SatelliteProvider.Services (GoogleMapsDownloaderV2, TileService) | Google Maps tile acquisition, storage, caching |
| 4 | RegionProcessing | SatelliteProvider.Services (RegionService, RegionProcessingService, RegionRequestQueue) | Region request lifecycle, tile stitching, CSV/summary output |
| 5 | RouteManagement | SatelliteProvider.Services (RouteService, RouteProcessingService) | Route creation, point interpolation, geofencing, consolidated map output |
| — | WebApi | SatelliteProvider.Api (Program.cs) | HTTP endpoints, DI configuration, startup |