transformation_difference
Calculate geometric differences between two polygons to identify areas present in the first polygon but not in the second polygon using GeoJSON data.
Instructions
计算两个多边形的差异。
该函数使用 Turf.js 库的 difference 方法，计算两个多边形的几何差异。
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": [[[128, -26], [141, -26], [141, -21], [128, -21], [128, -26]]]}}, {"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[126, -28], [140, -28], [140, -20], [126, -20], [126, -28]]]}}]}'
Returns: str: JSON 字符串格式的差异 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": [[[128, -26], [141, -26], ...]]}}'
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": [[[128, -26], [141, -26], [141, -21], [128, -21], [128, -26]]]}}, {"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[126, -28], [140, -28], [140, -20], [126, -20], [126, -28]]]}}]}' >>> result = asyncio.run(difference(featureCollection)) >>> print(result) '{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[128, -26], [141, -26], ...]]}}'
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) - 计算第一个多边形与第二个多边形的差异 - 返回第一个多边形中不在第二个多边形中的部分 - 依赖于 Turf.js 库和 Node.js 环境
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| featureCollection | Yes |