measurement_envelope
Convert geographic objects to bounding box polygons for spatial analysis. Calculates the minimum rectangular area containing all input features and outputs a GeoJSON polygon geometry.
Instructions
将地理对象转换为边界框多边形。
此功能计算给定地理对象的边界框，并将其转换为完整的多边形几何图形，便于进行多边形操作。
Args: geojson: GeoJSON 对象 - 类型: str (JSON 字符串格式的 GeoJSON) - 格式: 任何有效的 GeoJSON 对象 - 坐标系: WGS84 (经度在前，纬度在后) - 示例: '{"type": "FeatureCollection", "features": [{"type": "Feature", "geometry": {"type": "Point", "coordinates": [-75.343, 39.984]}}, ...]}'
Returns: str: JSON 字符串格式的 GeoJSON Polygon 特征 - 类型: GeoJSON Feature with Polygon geometry - 格式: {"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [...]}} - 示例: '{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[-82, 35], [-74, 35], [-74, 42], [-82, 42], [-82, 35]]]}}'
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 >>> geojson = '{"type": "FeatureCollection", "features": [{"type": "Feature", "geometry": {"type": "Point", "coordinates": [-75.343, 39.984]}}]}' >>> result = asyncio.run(envelope(geojson)) >>> print(result) '{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[-82, 35], [-74, 35], [-74, 42], [-82, 42], [-82, 35]]]}}'
Notes: - 输入参数 geojson 必须是有效的 JSON 字符串 - 坐标顺序为 [经度, 纬度] (WGS84 坐标系) - 包络多边形是包含所有输入特征的最小边界框多边形 - 依赖于 Turf.js 库和 Node.js 环境
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| geojson | Yes |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| result | Yes |