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Turf-MCP

by es3154

transformation_transformScale

Scale GeoJSON objects by a specified factor from a defined origin point. Resize geographic features while maintaining spatial relationships and coordinate systems.

Instructions

缩放 GeoJSON 对象。

该函数使用 Turf.js 库的 transformScale 方法,从给定点缩放 GeoJSON 对象。

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": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[0,29],[3.5,29],[2.5,32],[0,29]]]}}'

factor: 缩放因子 - 类型: float - 描述: 缩放因子,例如 2 表示放大两倍 - 示例: 3.0 options: 可选参数配置 - 类型: str (JSON 字符串) 或 None - 可选字段: - origin: 缩放原点坐标 (默认: 'centroid') - mutate: 是否允许修改输入对象 (默认: false) - 示例: '{"origin": [0, 25], "mutate": false}'

Returns: str: JSON 字符串格式的缩放后的 GeoJSON 对象 - 类型: 与输入相同的 GeoJSON 类型 - 格式: 与输入相同的格式 - 示例: '{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[0,29],[10.5,29],[7.5,32],[0,29]]]}}'

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": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[0,29],[3.5,29],[2.5,32],[0,29]]]}}' >>> result = asyncio.run(transformScale(geojson, 3.0)) >>> print(result) '{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[0,29],[10.5,29],[7.5,32],[0,29]]]}}'

Notes: - 输入参数 geojson 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) - 缩放因子为 2 表示尺寸加倍 - 默认从几何图形的质心缩放 - 对于 FeatureCollection,为每个特征单独计算原点 - 依赖于 Turf.js 库和 Node.js 环境

Input Schema

NameRequiredDescriptionDefault
factorYes
geojsonYes
optionsNo

Input Schema (JSON Schema)

{ "properties": { "factor": { "type": "number" }, "geojson": { "type": "string" }, "options": { "anyOf": [ { "type": "string" }, { "type": "null" } ], "default": null } }, "required": [ "geojson", "factor" ], "type": "object" }

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