feat: auto add dem file if not provided by the user

.env.example

@@ -8,6 +8,11 @@ POSTGRES_HOST=${POSTGRES_HOST:-db}
 S3_BUCKET_NAME=${S3_BUCKET_NAME:-dtm-bucket}
 S3_ACCESS_KEY=${S3_ACCESS_KEY:-SAMPLEACCESSKEYFORMINIOROOT}
 S3_SECRET_KEY=${S3_SECRET_KEY:-SAMPLESECRETACCESSKEYFORMINIOROOT}
+
+
+### JAXA ###
+JAXA_AUTH_TOKEN=${JAXA_AUTH_TOKEN:-SAMPLEJAXAACCESSTOKEN}
+
 # Use MINIO_ENDPOINT if minioconsole exposed to internet & behind rev proxy.
 # REF:https://min.io/docs/minio/linux/integrations/setup-nginx-proxy-with-minio.html
 # ex: https://minio.example.net/minio/ui/

src/backend/app/config.py

@@ -89,6 +89,8 @@ def assemble_db_connection(cls, v: Optional[str], info: ValidationInfo) -> Any:
     S3_BUCKET_NAME: str = "dtm-data"
     S3_DOWNLOAD_ROOT: Optional[str] = None
 
+    JAXA_AUTH_TOKEN: Optional[str] = ""
+
     ALGORITHM: str = "HS256"
     ACCESS_TOKEN_EXPIRE_MINUTES: int = 60 * 60 * 24 * 1  # 1 day
     REFRESH_TOKEN_EXPIRE_MINUTES: int = 60 * 60 * 24 * 8  # 8 day

src/backend/app/jaxa/tif_spider.py

@@ -0,0 +1,85 @@
+import os
+import zipfile
+import io
+import scrapy
+
+from osgeo import gdal
+from pathlib import Path
+from app.config import settings
+
+base_dir = Path(__file__).resolve().parent
+
+
+class TifSpider(scrapy.Spider):
+    name = "tif_spider"
+    allowed_domains = ["eorc.jaxa.jp"]
+    merged_file_path = None
+
+    def __init__(self, coordinates, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.tif_files = []
+        self.coordinates = coordinates.split(",")
+
+    headers = {
+        "authority": "www.eorc.jaxa.jp",
+        "path": "/ALOS/en/aw3d30/data/html_v2404/xml/{caption}_5_5.xml",
+        "method": "GET",
+        "accept": "application/xml, text/xml, */*; q=0.01",
+        "accept-encoding": "gzip, deflate, br, zstd",
+        "accept-language": "en-US,en;q=0.9",
+        "authorization": f"Basic {settings.JAXA_AUTH_TOKEN}",
+        "cache-control": "no-cache",
+        "pragma": "no-cache",
+        "sec-ch-ua": '"Chromium";v="128", "Not;A=Brand";v="24", "Google Chrome";v="128"',
+        "sec-ch-ua-mobile": "?0",
+        "sec-ch-ua-platform": '"Linux"',
+        "sec-fetch-dest": "empty",
+        "sec-fetch-mode": "cors",
+        "sec-fetch-site": "same-origin",
+        "user-agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36",
+        "x-requested-with": "XMLHttpRequest",
+    }
+
+    def start_requests(self):
+        urls = []
+        for coordinate in self.coordinates:
+            coords = coordinate.split("_")
+            five_by_five, one_by_one = coords[0], coords[1]
+            urls.append(
+                f"https://www.eorc.jaxa.jp/ALOS/aw3d30/data/release_v2404/{five_by_five}/{one_by_one}.zip",
+            )
+
+        for url in urls:
+            yield scrapy.Request(url=url, callback=self.parse)
+
+    def parse(self, response):
+        temp_dir = os.path.join(os.getcwd(), "temp")
+        os.makedirs(temp_dir, exist_ok=True)
+        try:
+            with zipfile.ZipFile(io.BytesIO(response.body)) as zip_file:
+                self.log(f"Extracted files: {zip_file.namelist()}")
+                for file_name in zip_file.namelist():
+                    if file_name.endswith("DSM.tif"):
+                        # Save .tif file into the temp directory
+                        temp_path = os.path.join(temp_dir, os.path.basename(file_name))
+                        with zip_file.open(file_name) as tif_file:
+                            with open(temp_path, "wb") as out_file:
+                                out_file.write(tif_file.read())
+                        self.tif_files.append(temp_path)
+        except Exception:
+            pass
+
+    def closed(self, reason):
+        if self.tif_files:
+            self.merged_file_path = self.merge_tiles()
+
+    def merge_tiles(self):
+        vrt_file = "merged.vrt"
+        gdal.BuildVRT(vrt_file, self.tif_files)
+        output_file = str(base_dir / "merged.tif")
+
+        gdal.Translate(output_file, vrt_file)
+        for file in self.tif_files:
+            os.remove(file)
+        os.remove(vrt_file)
+        return output_file

src/backend/app/jaxa_coordinates.py

@@ -0,0 +1,107 @@
+import math
+from shapely.geometry import Polygon, box
+
+
+def parse_polygon(coordinates):
+    """
+    Parses the input coordinates into a Shapely Polygon object.
+    """
+    return Polygon(coordinates)
+
+
+def get_bounding_box(polygon):
+    """
+    Returns the bounding box of the polygon as (min_lon, min_lat, max_lon, max_lat).
+    """
+    min_lon, min_lat, max_lon, max_lat = polygon.bounds
+    return min_lon, min_lat, max_lon, max_lat
+
+
+def get_5x5_tiles(min_lon, min_lat, max_lon, max_lat):
+    """
+    Calculates all 5°×5° tiles that intersect with the bounding box.
+    Returns a list of tuples representing the lower-left corner of each tile.
+    """
+    tiles = []
+
+    # Define the origin for 5x5 tiles
+    origin_lon = -180
+    origin_lat = -90
+
+    # Calculate the starting and ending indices for longitude and latitude
+    start_lon_idx = math.floor((min_lon - origin_lon) / 5)
+    end_lon_idx = math.floor((max_lon - origin_lon) / 5)
+    start_lat_idx = math.floor((min_lat - origin_lat) / 5)
+    end_lat_idx = math.floor((max_lat - origin_lat) / 5)
+
+    for lon_idx in range(start_lon_idx, end_lon_idx + 1):
+        for lat_idx in range(start_lat_idx, end_lat_idx + 1):
+            tile_lon = origin_lon + lon_idx * 5
+            tile_lat = origin_lat + lat_idx * 5
+            tiles.append((tile_lon, tile_lat))
+
+    return tiles
+
+
+def get_1x1_tiles_within_5x5(tile_lon, tile_lat, polygon):
+    """
+    For a given 5°×5° tile, calculates all 1°×1° tiles that intersect with the polygon.
+    Returns a list of tuples representing the lower-left corner of each 1x1 tile.
+    """
+    tiles = []
+
+    for lon in range(int(tile_lon), int(tile_lon + 5)):
+        for lat in range(int(tile_lat), int(tile_lat + 5)):
+            tile_polygon = box(lon, lat, lon + 1, lat + 1)
+            if polygon.intersects(tile_polygon):
+                tiles.append((lon, lat))
+
+    return tiles
+
+
+def format_tile_name(tile5_lon, tile5_lat, tile1_lon, tile1_lat):
+    """
+    Formats the tile name based on the naming convention:
+    N015W075_N019W071
+    """
+    # Format 5x5 tile part
+    lat_5 = f"{abs(tile5_lat):03d}"
+    lat_dir_5 = "N" if tile5_lat >= 0 else "S"
+    lon_5 = f"{abs(tile5_lon):03d}"
+    lon_dir_5 = "E" if tile5_lon >= 0 else "W"
+    tile5 = f"{lat_dir_5}{lat_5}{lon_dir_5}{lon_5}"
+
+    # Format 1x1 tile part
+    lat_1 = f"{abs(tile1_lat):03d}"
+    lat_dir_1 = "N" if tile1_lat >= 0 else "S"
+    lon_1 = f"{abs(tile1_lon):03d}"
+    lon_dir_1 = "E" if tile1_lon >= 0 else "W"
+    tile1 = f"{lat_dir_1}{lat_1}{lon_dir_1}{lon_1}"
+
+    return f"{tile5}_{tile1}"
+
+
+def get_covering_tiles(polygon_geojson):
+    """
+    Main function to get the list of tile names covering the polygon.
+    """
+    # Parse the GeoJSON polygon
+    polygon = parse_polygon(polygon_geojson["coordinates"][0])
+
+    # Get bounding box
+    min_lon, min_lat, max_lon, max_lat = get_bounding_box(polygon)
+
+    # Get all relevant 5x5 tiles
+    tiles_5x5 = get_5x5_tiles(min_lon, min_lat, max_lon, max_lat)
+
+    # Initialize a set to avoid duplicates
+    tile_names = set()
+
+    # Iterate through each 5x5 tile and find intersecting 1x1 tiles
+    for tile5_lon, tile5_lat in tiles_5x5:
+        tiles_1x1 = get_1x1_tiles_within_5x5(tile5_lon, tile5_lat, polygon)
+        for tile1_lon, tile1_lat in tiles_1x1:
+            name = format_tile_name(tile5_lon, tile5_lat, tile1_lon, tile1_lat)
+            tile_names.add(name)
+
+    return sorted(tile_names)

src/backend/app/projects/project_routes.py

@@ -38,6 +38,7 @@
     send_project_approval_email_to_regulator,
 )
 from app.users import user_schemas
+from app.upload_dem import upload_dem_file
 from minio.deleteobjects import DeleteObject
 from drone_flightplan import waypoints
 
@@ -228,6 +229,12 @@ async def create_project(
             project_info.name,
         )
 
+    if project_info.is_terrain_follow and not dem:
+        geometry = project_info.outline["features"][0]["geometry"]
+        background_tasks.add_task(
+            upload_dem_file, db, geometry, project_id, background_tasks
+        )
+
     return {"message": "Project successfully created", "project_id": project_id}
 
 

src/backend/app/upload_dem.py

@@ -0,0 +1,71 @@
+import os
+import io
+
+from fastapi import UploadFile, BackgroundTasks
+from pathlib import Path
+from psycopg import Connection
+
+
+from scrapy.crawler import CrawlerProcess
+from scrapy.utils.project import get_project_settings
+
+from app.projects import project_logic
+from app.jaxa_coordinates import get_covering_tiles
+from app.jaxa.tif_spider import TifSpider
+
+
+base_dir = Path(__file__).resolve().parent
+
+
+def upload_dem_file(
+    db: Connection, geometry, project_id, background_tasks: BackgroundTasks
+):
+    """
+    Fetch the dem file from the scrapy and pass it to store in the db in background
+
+    Args:
+        db (Connection): _description_
+        geometry (_type_): _description_
+        project_id (_type_): _description_
+        background_tasks (BackgroundTasks): _description_
+    """
+
+    tiles = get_covering_tiles(geometry)
+    tif_file_path = str(base_dir / "jaxa/merged.tif")
+
+    coordinates_str = ",".join(tiles)
+    process = CrawlerProcess(get_project_settings())
+
+    crawler = process.create_crawler(TifSpider)
+
+    process.crawl(crawler, coordinates=coordinates_str)
+
+    try:
+        process.start()
+        print("Scrapy executed successfully.")
+
+        ## store the file in db
+        background_tasks.add_task(upload_dem_file_s3, db, tif_file_path, project_id)
+    except Exception as e:
+        print(f"Scrapy execution failed: {str(e)}")
+
+
+async def upload_dem_file_s3(db: Connection, tif_file_path, project_id):
+    """
+    Upload the dem file in the db
+
+    Args:
+        db (Connection): _description_
+        tif_file_path (_type_): _description_
+        project_id (_type_): _description_
+    """
+    with open(tif_file_path, "rb") as dem_file:
+        file_bytes = dem_file.read()
+        file_obj = io.BytesIO(file_bytes)  # Create an in-memory file-like object
+        dem = UploadFile(file=file_obj, filename="dem.tif")
+
+    dem_url = await project_logic.upload_file_to_s3(project_id, dem, "dem.tif")
+
+    await project_logic.update_url(db, project_id, dem_url)
+    os.remove(tif_file_path)
+    print("Removed file successfully")

src/backend/pyproject.toml

@@ -34,6 +34,7 @@ dependencies = [
     "asgiref>=3.8.1",
     "bcrypt>=4.2.1",
     "drone-flightplan>=0.3.2",
+    "Scrapy==2.12.0",
 ]
 requires-python = ">=3.11"
 license = {text = "GPL-3.0-only"}