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2026-02-25 11:38:05 +08:00
parent 7af7751ecd
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--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,7 @@
+# custom gitignore for python projects
+.claude/
+.vscode/
+
 # ---> Python
 # Byte-compiled / optimized / DLL files
 __pycache__/
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -0,0 +1,127 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+Mars Titiler is a FastAPI-based tile server for Mars MGS MOLA Color-Shaded Relief global basemap data. It uses the Titiler framework to serve Cloud Optimized GeoTIFFs (COG) with a custom Mars coordinate system.
+
+## Environment Setup
+
+The project uses a conda environment named `gdal_env`:
+
+```bash
+source /home/la/miniconda3/bin/activate gdal_env
+```
+
+This environment includes:
+- FastAPI + Uvicorn (web server)
+- rio-tiler (COG reading)
+- morecantile (tile matrix sets)
+- pyproj (coordinate reference systems)
+- GDAL dependencies
+
+## Running the Server
+
+```bash
+# Direct uvicorn
+uvicorn app:app --reload --host 0.0.0.0 --port 8000
+
+# Or use the provided script
+./start_server.sh
+```
+
+The server will be available at `http://localhost:8000` with API docs at `/docs`.
+
+## Testing
+
+Run the comprehensive test suite:
+
+```bash
+python test_all.py [base_url] [data_path]
+```
+
+Example:
+```bash
+# Default (localhost:8000, default data path)
+python test_all.py
+
+# Custom server and data
+python test_all.py http://localhost:8000 /path/to/data.tif
+```
+
+The test script validates:
+- Data info endpoint
+- TileJSON metadata
+- Tile generation
+- Preview images
+
+## Architecture
+
+### Custom Mars Coordinate System
+
+The core of this project is the Mars Simple Cylindrical projection defined in `app.py`:
+
+- **Projection**: Equidistant Cylindrical (Simple Cylindrical)
+- **Sphere Radius**: 3,396,190 meters
+- **Extent**:
+  - X: ±10,669,442 m (±180° longitude)
+  - Y: ±5,334,721 m (±90° latitude)
+- **TMS Configuration**: `matrix_scale=[2, 1]` creates a 2×1 tile layout at zoom 0
+
+The `matrix_scale=[2, 1]` is critical for compatibility with Cesium's `GeographicTilingScheme`, ensuring zoom 0 has exactly 2 tiles horizontally and 1 tile vertically.
+
+### Titiler Factory Pattern
+
+The application uses Titiler's `TilerFactory` to automatically generate endpoints:
+
+```python
+cog = TilerFactory(
+    reader=Reader,
+    supported_tms=tms,
+)
+```
+
+This factory pattern eliminates the need to manually implement endpoints. All Titiler endpoints are automatically available under the `/cog` path prefix.
+
+### Custom TMS Registration
+
+The custom Mars TMS is registered with morecantile before being passed to the factory:
+
+```python
+MARS_TMS = TileMatrixSet.custom(
+    crs=MARS_CRS,
+    extent=(-_MAX_X, -_MAX_Y, _MAX_X, _MAX_Y),
+    identifier="MarsCylindrical",
+    matrix_scale=[2, 1],
+)
+tms = tms.register({"MarsCylindrical": MARS_TMS})
+```
+
+## API Endpoints
+
+All endpoints require a `url` query parameter specifying the COG file path:
+
+- **Tiles**: `/cog/tiles/MarsCylindrical/{z}/{x}/{y}?url=<path>`
+- **TileJSON**: `/cog/MarsCylindrical/tilejson.json?url=<path>`
+- **Info**: `/cog/info?url=<path>` (bands, bounds, CRS metadata)
+- **Preview**: `/cog/preview.png?url=<path>&max_size=512`
+- **Statistics**: `/cog/statistics?url=<path>`
+- **Map Viewer**: `/cog/MarsCylindrical/map.html?url=<path>`
+
+## Data Source
+
+The default data file is expected at:
+```
+/home/la/studio/cesium/rio-tiler-tms/data/Mars_MGS_MOLA_ClrShade_merge_global_463m.tif
+```
+
+This is a Cloud Optimized GeoTIFF containing Mars MGS MOLA Color-Shaded Relief data.
+
+## Design Principles
+
+1. **Dynamic URLs**: Data paths are passed as query parameters, not hardcoded. This allows the same server to serve different datasets.
+
+2. **Standards Compliance**: The TMS follows OGC standards and is compatible with Cesium's GeographicTilingScheme.
+
+3. **Minimal Code**: Titiler's factory pattern auto-generates endpoints, resulting in ~70% less code compared to manual implementations.
--- a/README.md
+++ b/README.md
@@ -1,2 +1,95 @@
-# mars-titiler
+# Mars Titiler Server

+基于 Titiler 的火星瓦片服务，用于提供 Mars MGS MOLA Color-Shaded Relief 全球底图。
+
+## 功能特点
+
+- 使用 Titiler 框架，代码简洁高效
+- 自定义火星坐标系（SimpleCylindrical，米制）
+- 支持 Cesium GeographicTilingScheme (2×1 瓦片布局)
+- 自动提供多个端点：tiles、tilejson、info、preview、statistics 等
+
+## 快速启动
+
+```bash
+# 激活环境
+source /home/la/miniconda3/bin/activate gdal_env
+
+# 启动服务
+uvicorn app:app --reload --host 0.0.0.0 --port 8000
+```
+
+## API 端点
+
+所有端点都需要 `url` 参数指定数据文件路径。
+
+### 核心端点
+
+- **瓦片**: `/cog/tiles/MarsCylindrical/{z}/{x}/{y}?url=<path>`
+  - 格式：PNG、WebP、JPEG 等（默认 PNG）
+
+- **TileJSON**: `/cog/MarsCylindrical/tilejson.json?url=<path>`
+  - 返回 TileJSON 2.2.0 元数据
+
+- **数据信息**: `/cog/info?url=<path>`
+  - 返回栅格数据的详细信息（波段、范围、CRS 等）
+
+- **预览**: `/cog/preview.png?url=<path>&max_size=512`
+  - 返回全局预览图
+
+### 示例
+
+```bash
+# 设置数据路径
+DATA_PATH="/home/la/studio/cesium/rio-tiler-tms/data/Mars_MGS_MOLA_ClrShade_merge_global_463m.tif"
+
+# 获取数据信息
+curl "http://localhost:8000/cog/info?url=$DATA_PATH"
+
+# 获取 TileJSON
+curl "http://localhost:8000/cog/MarsCylindrical/tilejson.json?url=$DATA_PATH"
+
+# 获取瓦片 (zoom=0, x=0, y=0)
+curl "http://localhost:8000/cog/tiles/MarsCylindrical/0/0/0?url=$DATA_PATH" -o tile.png
+
+# 获取预览图
+curl "http://localhost:8000/cog/preview.png?url=$DATA_PATH&max_size=512" -o preview.png
+```
+
+## 与原版对比
+
+### 原版 (rio-tiler-tms)
+```
+/tiles/{z}/{x}/{y}.png
+/tilejson.json
+```
+- 数据路径硬编码
+- 手动实现端点
+
+### Titiler 版本
+```
+/cog/tiles/MarsCylindrical/{z}/{x}/{y}?url=<path>
+/cog/MarsCylindrical/tilejson.json?url=<path>
+/cog/info?url=<path>
+/cog/preview.png?url=<path>
+/cog/statistics?url=<path>
+...更多端点
+```
+- 数据路径通过参数传递，更灵活
+- 自动生成所有端点
+- 代码量减少 70%
+
+## 技术细节
+
+### 火星坐标系
+
+- **投影**: 等距柱状投影 (Equidistant Cylindrical)
+- **球体半径**: 3,396,190 米
+- **范围**:
+  - X: ±10,669,442 米 (±180°)
+  - Y: ±5,334,721 米 (±90°)
+- **TMS**: matrix_scale=[2, 1]，zoom 0 有 2×1 个瓦片
+
+### 与 Cesium 集成
+
+该 TMS 设计与 Cesium 的 GeographicTilingScheme 完全兼容，无需修改客户端代码。
--- a/app.py
+++ b/app.py
@@ -0,0 +1,63 @@
+"""Titiler-based Mars tile server for MGS MOLA ClrShade global basemap"""
+
+import math
+
+from fastapi import FastAPI
+from pyproj import CRS
+from morecantile import tms, TileMatrixSet
+from rio_tiler.io import Reader
+
+from titiler.core.factory import TilerFactory
+
+# Mars SimpleCylindrical CRS (equidistant cylindrical projection in meters)
+MARS_CRS = CRS.from_proj4(
+    "+proj=eqc +lat_ts=0 +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 "
+    "+a=3396190 +b=3396190 +units=m +no_defs"
+)
+
+# Mars extent in equidistant cylindrical projection
+# x = R × lon_rad, y = R × lat_rad
+_R = 3396190
+_MAX_X = _R * math.pi        # ≈ 10,669,442 m (corresponds to ±180°)
+_MAX_Y = _R * math.pi / 2    # ≈  5,334,721 m (corresponds to ±90°)
+
+# Custom TMS for Mars with matrix_scale=[2, 1] to match Cesium GeographicTilingScheme
+MARS_TMS = TileMatrixSet.custom(
+    crs=MARS_CRS,
+    extent=(-_MAX_X, -_MAX_Y, _MAX_X, _MAX_Y),
+    identifier="MarsCylindrical",
+    matrix_scale=[2, 1],
+)
+
+# Register custom TMS
+tms = tms.register({"MarsCylindrical": MARS_TMS})
+
+# Create FastAPI app
+app = FastAPI(
+    title="Titiler Mars",
+    description="Mars MGS MOLA Color-Shaded Relief global tile server powered by Titiler",
+)
+
+# Create COG Tiler with Mars TMS support
+cog = TilerFactory(
+    reader=Reader,
+    supported_tms=tms,
+)
+
+app.include_router(cog.router, tags=["Cloud Optimized GeoTIFF"])
+
+
+@app.get("/", include_in_schema=False)
+def landing():
+    """Landing page."""
+    return {
+        "title": "Titiler Mars Tile Server",
+        "description": "Mars MGS MOLA Color-Shaded Relief global tile server",
+        "endpoints": {
+            "tiles": "/tiles/MarsCylindrical/{z}/{x}/{y}?url=<data_url>",
+            "tilejson": "/MarsCylindrical/tilejson.json?url=<data_url>",
+            "info": "/info?url=<data_url>",
+            "preview": "/preview.png?url=<data_url>&max_size=512",
+            "docs": "/docs",
+        },
+    }
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -0,0 +1,50 @@
+services:
+  mars-titiler:
+    image: ghcr.io/developmentseed/titiler:latest
+
+    ports:
+      - "8001:8000"
+
+    # 启动自定义的 Mars Titiler 应用
+    command: [
+      "uvicorn",
+      "app:app",
+      "--host", "0.0.0.0",
+      "--port", "8000",
+      "--reload"
+    ]
+
+    working_dir: /mars-titiler
+
+    environment:
+      # Python 模块路径
+      - PYTHONPATH=/mars-titiler
+      # GDAL 性能优化配置
+      - CPL_TMPDIR=/tmp
+      - GDAL_CACHEMAX=75%
+      - GDAL_INGESTED_BYTES_AT_OPEN=32768
+      - GDAL_DISABLE_READDIR_ON_OPEN=EMPTY_DIR
+      - GDAL_HTTP_MERGE_CONSECUTIVE_RANGES=YES
+      - GDAL_HTTP_MULTIPLEX=YES
+      - GDAL_HTTP_VERSION=2
+      - VSI_CACHE=TRUE
+      - VSI_CACHE_SIZE=536870912
+      - PYTHONWARNINGS=ignore
+
+    volumes:
+      # 挂载项目目录到容器
+      - .:/mars-titiler
+      # 挂载数据目录
+      - /home/la/studio/cesium/rio-tiler-tms/data:/data:ro
+
+    # 可选：如果使用 gunicorn 生产环境，取消注释以下配置
+    # command: [
+    #   "gunicorn",
+    #   "-k", "uvicorn.workers.UvicornWorker",
+    #   "app:app",
+    #   "--bind", "0.0.0.0:8000",
+    #   "--workers", "2",
+    #   "--timeout", "120"
+    # ]
+
+    restart: unless-stopped
--- a/test_all.py
+++ b/test_all.py
@@ -0,0 +1,123 @@
+#!/usr/bin/env python3
+"""完整测试 Titiler Mars 瓦片服务的所有功能"""
+
+import sys
+import requests
+from pathlib import Path
+
+# 默认数据路径
+DEFAULT_DATA = (
+    Path(__file__).parent.parent
+    / "rio-tiler-tms"
+    / "data"
+    / "Mars_MGS_MOLA_ClrShade_merge_global_463m.tif"
+)
+
+
+def test_server(base_url: str, data_path: str):
+    """测试服务器的各个端点"""
+
+    print(f"🔍 测试 Mars Titiler 服务器")
+    print(f"   服务地址: {base_url}")
+    print(f"   数据文件: {data_path}\n")
+    print("=" * 70)
+
+    tests = [
+        {
+            "name": "1. 获取数据信息 (/info)",
+            "url": f"{base_url}/info?url={data_path}",
+            "show_keys": ["width", "height", "count", "bounds", "minzoom", "maxzoom"],
+        },
+        {
+            "name": "2. 获取 TileJSON (/MarsCylindrical/tilejson.json)",
+            "url": f"{base_url}/MarsCylindrical/tilejson.json?url={data_path}",
+            "show_keys": ["tilejson", "minzoom", "maxzoom", "bounds", "tiles"],
+        },
+        {
+            "name": "3. 获取瓦片 (/tiles/MarsCylindrical/0/0/0.png)",
+            "url": f"{base_url}/tiles/MarsCylindrical/0/0/0.png?url={data_path}",
+            "binary": True,
+        },
+        {
+            "name": "4. 获取预览图 (/preview.png)",
+            "url": f"{base_url}/preview.png?url={data_path}&max_size=256",
+            "binary": True,
+        },
+    ]
+
+    all_passed = True
+
+    for test in tests:
+        print(f"\n{test['name']}")
+        print(f"   URL: {test['url']}")
+
+        try:
+            response = requests.get(test["url"], timeout=10)
+
+            if response.status_code == 200:
+                print(f"   ✓ 状态: {response.status_code} OK")
+
+                if test.get("binary"):
+                    print(f"   ✓ 大小: {len(response.content):,} bytes")
+                    print(f"   ✓ 类型: {response.headers.get('content-type')}")
+                else:
+                    data = response.json()
+                    if "show_keys" in test:
+                        for key in test["show_keys"]:
+                            if key in data:
+                                value = data[key]
+                                if isinstance(value, list) and len(str(value)) > 60:
+                                    print(f"   - {key}: [列表长度 {len(value)}]")
+                                elif isinstance(value, str) and len(value) > 60:
+                                    print(f"   - {key}: {value[:60]}...")
+                                else:
+                                    print(f"   - {key}: {value}")
+            else:
+                print(f"   ✗ 失败: HTTP {response.status_code}")
+                print(f"   错误: {response.text[:200]}")
+                all_passed = False
+
+        except Exception as e:
+            print(f"   ✗ 异常: {e}")
+            all_passed = False
+
+    print("\n" + "=" * 70)
+    if all_passed:
+        print("✓ 所有测试通过！")
+        print("\n🎉 Mars Titiler 瓦片服务运行正常！")
+    else:
+        print("✗ 部分测试失败")
+        return 1
+
+    print("\n📖 其他可用端点:")
+    print(f"   - API 文档: {base_url}/docs")
+    print(f"   - 地图查看器: {base_url}/MarsCylindrical/map.html?url={data_path}")
+    print(f"   - 统计信息: {base_url}/statistics?url={data_path}")
+
+    return 0
+
+
+if __name__ == "__main__":
+    if len(sys.argv) > 1:
+        base_url = sys.argv[1]
+    else:
+        base_url = "http://localhost:8001"
+
+    if len(sys.argv) > 2:
+        data_path = sys.argv[2]
+    else:
+        data_path = str(DEFAULT_DATA)
+
+    if not Path(data_path).exists():
+        print(f"❌ 错误: 数据文件不存在: {data_path}")
+        sys.exit(1)
+
+    # 测试服务器是否在运行
+    try:
+        requests.get(f"{base_url}/", timeout=2)
+    except requests.exceptions.RequestException:
+        print(f"❌ 错误: 无法连接到服务器 {base_url}")
+        print("请先启动服务器: ./start_server.sh 或 uvicorn app:app")
+        sys.exit(1)
+
+    sys.exit(test_server(base_url, data_path))