transformation_union
Combine two polygons into a single polygon using Turf.js union method. Accepts GeoJSON FeatureCollection with two polygons and returns merged geometry as GeoJSON Feature.
Instructions
合并两个多边形。
该函数使用 Turf.js 库的 union 方法，合并两个多边形为一个多边形。
Args: featureCollection: 包含两个多边形的 GeoJSON FeatureCollection - 类型: str (JSON 字符串格式的 GeoJSON) - 格式: 必须符合 GeoJSON FeatureCollection 规范，包含两个 Polygon 特征 - 坐标系: WGS84 (经度在前，纬度在后) - 示例: '{"type": "FeatureCollection", "features": [{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[-82.574787, 35.594087], [-82.574787, 35.615581], [-82.545261, 35.615581], [-82.545261, 35.594087], [-82.574787, 35.594087]]]}}, {"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[-82.560024, 35.585153], [-82.560024, 35.602602], [-82.52964, 35.602602], [-82.52964, 35.585153], [-82.560024, 35.585153]]]}}]}'
Returns: str: JSON 字符串格式的合并后的 GeoJSON Feature - 类型: GeoJSON Feature with Polygon or MultiPolygon geometry - 格式: {"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [...]}} - 示例: '{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[-82.574787, 35.585153], [-82.574787, 35.615581], [-82.52964, 35.615581], [-82.52964, 35.585153], [-82.574787, 35.585153]]]}}'
Raises: Exception: 当 JavaScript 执行失败、超时或输入数据格式错误时抛出异常
Example: >>> import asyncio >>> featureCollection = '{"type": "FeatureCollection", "features": [{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[-82.574787, 35.594087], [-82.574787, 35.615581], [-82.545261, 35.615581], [-82.545261, 35.594087], [-82.574787, 35.594087]]]}}, {"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[-82.560024, 35.585153], [-82.560024, 35.602602], [-82.52964, 35.602602], [-82.52964, 35.585153], [-82.560024, 35.585153]]]}}]}' >>> result = asyncio.run(union(featureCollection)) >>> print(result) '{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[-82.574787, 35.585153], [-82.574787, 35.615581], [-82.52964, 35.615581], [-82.52964, 35.585153], [-82.574787, 35.585153]]]}}'
Notes: - 输入参数 featureCollection 必须是有效的 JSON 字符串 - 坐标顺序为 [经度, 纬度] (WGS84 坐标系) - 合并两个多边形的几何并集 - 返回包含两个多边形所有区域的多边形 - 依赖于 Turf.js 库和 Node.js 环境
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| featureCollection | Yes |