FastAPI Backend

Overview

This project provides a lightweight backend service using FastAPI, which serves geospatial data stored in a SQLite database. Key features include: - Retrieval of tile data using quadkeys. - Detail-level control for granular queries. - Database schema inspection.

Technology Stack

• Backend: FastAPI
• Database: SQLite

API Endpoints

/api/male/{z}/{y}/{x}/{raster_index}/{detailLevel}/{heightLevel}/{maxValue}

Fetch tile data for a specific area.

Parameters:

• z (int): Zoom level
• y (int): Tile Y-coordinate
• x (int): Tile X-coordinate
• raster_index (int): Raster index for database query
• detailLevel (int): Depth of children quadkeys

Response: JSON object with quadkey and corresponding data values.

/api/schema

Retrieve the database schema.

Response: List of table names in the SQLite database.

Key Components

Middleware

A middleware logs the time taken for each request to help monitor performance.

Database Interaction

The lifespan manager initializes a connection to the SQLite database and safely closes it when the app shuts down.

Quadkey Usage

The application uses pyquadkey2 to generate quadkeys and fetch detailed tile data.