first commit

app_world.py

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+"""rio-tiler dynamic tile server for Natural Earth HYP_HR_SR_OB_DR (global basemap)"""
+
+import os
+from pathlib import Path
+
+from fastapi import FastAPI, HTTPException
+from fastapi.responses import HTMLResponse
+from starlette.requests import Request
+from starlette.responses import Response
+
+from rio_tiler.errors import TileOutsideBounds
+from rio_tiler.io import Reader
+from rio_tiler.profiles import img_profiles
+
+DATA_PATH = str(Path(__file__).parent / "data" / "HYP_HR_SR_OB_DR_cog.tif")
+
+app = FastAPI(
+    title="rio-tiler world",
+    description="Global basemap tile server - Natural Earth HYP_HR_SR_OB_DR",
+)
+
+
+@app.get(
+    "/tiles/{z}/{x}/{y}.png",
+    responses={
+        200: {"content": {"image/png": {}}, "description": "Return a PNG tile."},
+        404: {"description": "Tile outside bounds."},
+    },
+    response_class=Response,
+    description="Read global COG tile and return PNG (uint8 RGB, no rescaling needed)",
+)
+def tile(z: int, x: int, y: int):
+    """Return a map tile for the given z/x/y coordinates."""
+    try:
+        with Reader(DATA_PATH) as cog:
+            img = cog.tile(x, y, z)
+    except TileOutsideBounds:
+        raise HTTPException(status_code=404, detail="Tile outside bounds")
+
+    content = img.render(
+        img_format="PNG",
+        **img_profiles.get("png", {}),
+    )
+    return Response(content, media_type="image/png")
+
+
+@app.get("/tilejson.json", responses={200: {"description": "Return a TileJSON document"}})
+def tilejson(request: Request):
+    """Return a TileJSON 2.2.0 document."""
+    with Reader(DATA_PATH) as cog:
+        bounds = cog.get_geographic_bounds(cog.tms.rasterio_geographic_crs)
+        minzoom = cog.minzoom
+        maxzoom = cog.maxzoom
+
+    base_url = str(request.base_url).rstrip("/")
+    tile_url = f"{base_url}/tiles/{{z}}/{{x}}/{{y}}.png"
+
+    return {
+        "tilejson": "2.2.0",
+        "name": "Natural Earth - HYP_HR_SR_OB_DR",
+        "description": "Natural Earth cross-blended hypsometric tints with shaded relief",
+        "tiles": [tile_url],
+        "bounds": list(bounds),
+        "minzoom": minzoom,
+        "maxzoom": maxzoom,
+        "center": [0, 20, minzoom],
+    }