aggregation_collect
Aggregates point attribute values into polygons for spatial analysis. Calculates sum of point properties within polygon boundaries to enable statistical summaries of geographic data.
Instructions
将点属性聚合到多边形中。
此功能将位于多边形内部的点的属性值聚合到多边形中，用于统计和汇总分析。
Args: polygons: 多边形特征集合 - 类型: str (JSON 字符串格式的 GeoJSON FeatureCollection) - 格式: FeatureCollection with Polygon or MultiPolygon features - 示例: '{"type": "FeatureCollection", "features": [{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[125, -15], [113, -22], [154, -27], [144, -15], [125, -15]]]}}, ...]}'
points: 点特征集合
- 类型: str (JSON 字符串格式的 GeoJSON FeatureCollection)
- 格式: FeatureCollection with Point features
- 示例: '{"type": "FeatureCollection", "features": [{"type": "Feature", "geometry": {"type": "Point", "coordinates": [-75.343, 39.984], "properties": {"population": 100}}, ...]}'
in_field: 输入字段名
- 类型: str
- 描述: 点特征中要聚合的属性字段名
- 示例: 'population'
out_field: 输出字段名
- 类型: str
- 描述: 多边形特征中要创建的聚合属性字段名
- 示例: 'total_population'Returns: str: JSON 字符串格式的 GeoJSON FeatureCollection - 类型: GeoJSON FeatureCollection with Polygon features - 格式: {"type": "FeatureCollection", "features": [{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [...]}, "properties": {..., "total_population": 聚合值}}, ...]} - 示例: '{"type": "FeatureCollection", "features": [{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [...]}, "properties": {"total_population": 1500}}, ...]}'
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 >>> polygons = '{"type": "FeatureCollection", "features": [{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[125, -15], [113, -22], [154, -27], [144, -15], [125, -15]]]}}]}' >>> points = '{"type": "FeatureCollection", "features": [{"type": "Feature", "geometry": {"type": "Point", "coordinates": [-75.343, 39.984], "properties": {"population": 100}}]}' >>> result = asyncio.run(collect(polygons, points, 'population', 'total_population')) >>> print(result) '{"type": "FeatureCollection", "features": [{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [...]}, "properties": {"total_population": 100}}, ...]}'
Notes: - 输入参数 polygons 和 points 必须是有效的 JSON 字符串 - 坐标顺序为 [经度, 纬度] (WGS84 坐标系) - 仅对位于多边形内部的点进行属性聚合 - 聚合方式为求和，即计算多边形内部所有点的属性值总和 - 依赖于 Turf.js 库和 Node.js 环境
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| polygons | Yes | ||
| points | Yes | ||
| in_field | Yes | ||
| out_field | Yes |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| result | Yes |