helper_lineString
Create GeoJSON LineString features from coordinate arrays to represent paths, boundaries, and linear geographic elements in spatial analysis.
Instructions
创建线特征对象。
此功能根据坐标点数组创建线特征，用于表示路径、边界等线性地理要素。
Args: coordinates: 坐标点数组 - 类型: str (JSON 字符串格式的数组) - 格式: [[lng1, lat1], [lng2, lat2], ...] - 示例: '[[-74, 40], [-78, 42], [-82, 35]]'
properties: 属性对象
- 类型: str (JSON 字符串) 或 None
- 格式: 键值对对象
- 示例: '{"name": "route", "type": "highway"}'
options: 可选参数配置
- 类型: str (JSON 字符串) 或 None
- 可选字段:
- bbox: 边界框数组 [minX, minY, maxX, maxY]
- id: 特征的标识符
- 示例: '{"bbox": [-83, 34, -73, 43], "id": "line1"}'Returns: str: JSON 字符串格式的 GeoJSON LineString Feature - 类型: GeoJSON Feature with LineString geometry - 格式: {"type": "Feature", "geometry": {"type": "LineString", "coordinates": [...]}, "properties": {...}} - 示例: '{"type": "Feature", "geometry": {"type": "LineString", "coordinates": [[-74, 40], [-78, 42], [-82, 35]]}, "properties": {"name": "route"}}'
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 >>> coordinates = '[[-74, 40], [-78, 42], [-82, 35]]' >>> properties = '{"name": "route"}' >>> result = asyncio.run(lineString(coordinates, properties)) >>> print(result) '{"type": "Feature", "geometry": {"type": "LineString", "coordinates": [[-74, 40], [-78, 42], [-82, 35]]}, "properties": {"name": "route"}}'
Notes: - 输入参数 coordinates、properties 和 options 必须是有效的 JSON 字符串 - 坐标顺序为 [经度, 纬度] (WGS84 坐标系) - 至少需要两个坐标点才能创建有效的线 - 依赖于 Turf.js 库和 Node.js 环境
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| coordinates | Yes | ||
| properties | No | ||
| options | No |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| result | Yes |