transformation_lineOffset
Calculate offset lines from GeoJSON LineString or MultiLineString features at specified distances. Generate parallel lines for spatial analysis, route planning, or buffer zone creation in geographic applications.
Instructions
计算线的偏移。
该函数使用 Turf.js 库的 lineOffset 方法，计算给定线的偏移线。
Args: line: GeoJSON LineString 或 MultiLineString 特征或几何图形 - 类型: str (JSON 字符串格式的 GeoJSON) - 格式: 必须符合 GeoJSON LineString 或 MultiLineString 规范 - 坐标系: WGS84 (经度在前，纬度在后) - 示例: '{"type": "LineString", "coordinates": [[-74, 40], [-78, 42], [-82, 35]]}'
Returns: str: JSON 字符串格式的偏移线 GeoJSON Feature - 类型: GeoJSON Feature with LineString or MultiLineString geometry - 格式: {"type": "Feature", "geometry": {"type": "LineString", "coordinates": [...]}} - 示例: '{"type": "Feature", "geometry": {"type": "LineString", "coordinates": [[-74.1, 40.1], [-78.1, 42.1], [-82.1, 35.1]]}}'
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 >>> line = '{"type": "LineString", "coordinates": [[-74, 40], [-78, 42], [-82, 35]]}' >>> options = '{"units": "miles"}' >>> result = asyncio.run(lineOffset(line, 10.0, options)) >>> print(result) '{"type": "Feature", "geometry": {"type": "LineString", "coordinates": [[-74.1, 40.1], [-78.1, 42.1], [-82.1, 35.1]]}}'
Notes: - 输入参数 line 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) - 距离可以为负值，表示相反方向的偏移 - 依赖于 Turf.js 库和 Node.js 环境
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| distance | Yes | ||
| line | Yes | ||
| options | No |