Colab image download attempt II

import os
import requests
from PIL import Image

# Base URL and directory setup
BASE_URL = "http://cartesmich.free.fr/images/France_LD/"
OUTPUT_DIR = "tiles"
MERGED_IMAGE = "merged_image.jpg"

# Ensure the output directory exists
os.makedirs(OUTPUT_DIR, exist_ok=True)

# Function to download a tile
def download_tile(url, save_path):
    response = requests.get(url)
    if response.status_code == 200:
        with open(save_path, "wb") as f:
            f.write(response.content)
        return True
    return False

# Function to stitch the tiles together
def stitch_tiles(tiles, tile_size):
    max_x = max(x for x, y in tiles.keys()) + 1
    max_y = max(y for x, y in tiles.keys()) + 1

    # Create a blank canvas for the final image
    merged_image = Image.new("RGB", (max_x * tile_size, max_y * tile_size))

    # Paste tiles onto the canvas
    for (x, y), tile_path in tiles.items():
        tile_image = Image.open(tile_path)
        merged_image.paste(tile_image, (x * tile_size, y * tile_size))

    return merged_image

# Set parameters for downloading tiles
tile_size = 256  # Assume each tile is 256x256
x_range = range(36, 50)  # Adjust based on your needs (x-coordinate range)
y_range = range(24, 40)  # Adjust based on your needs (y-coordinate range)
tile_groups = range(0, 13)  # Range of TileGroups (adjust based on feedback)

# Dictionary to store downloaded tile paths
downloaded_tiles = {}

# Download tiles from all TileGroups
for group in tile_groups:
    for x in x_range:
        for y in y_range:
            tile_url = f"{BASE_URL}TileGroup{group}/6-{x}-{y}.jpg"
            tile_path = os.path.join(OUTPUT_DIR, f"TileGroup{group}_6-{x}-{y}.jpg")
            if download_tile(tile_url, tile_path):
                downloaded_tiles[(x - min(x_range), y - min(y_range))] = tile_path
                print(f"Downloaded: {tile_url}")
            else:
                print(f"Tile not found: {tile_url}")

# Stitch the tiles into a single image
if downloaded_tiles:
    merged_image = stitch_tiles(downloaded_tiles, tile_size)
    merged_image.save(MERGED_IMAGE)
    print(f"Merged image saved as {MERGED_IMAGE}")
else:
    print("No tiles were downloaded!")