gcoord - 中国地图坐标系转换

Use when converting coordinates between WGS84, GCJ02, BD09, BD09MC, or WebMercator coordinate systems for Chinese map services (Baidu, Amap, Google China, etc.)

Security Scan

The skill's files, instructions, and requirements are coherent for a coordinate-conversion CLI: it only uses the gcoord library and runs a local Node script, and it does not request credentials or network endpoints.

Purpose & Capability

Name/description match the included code: index.js implements coordinate conversions using the gcoord npm package. Minor mismatch: SKILL.md and metadata list no required binaries, but the runtime assumes node is available (index.js is invoked with `node`).

Instruction Scope

SKILL.md confines runtime behavior to parsing user input, asking the user for missing parameters, and invoking the included index.js to perform conversions. It does not instruct reading unrelated files, sending data to external endpoints, or accessing environment secrets.

Install Mechanism

No install spec (instruction-only) and code files are included. package-lock.json references gcoord resolved from registry.npmmirror.com (an npm mirror). There are no download-from-arbitrary-URL installs or extract steps in the skill manifest.

Credentials

The skill requests no environment variables, credentials, or config paths. The code likewise does not read env vars or secrets.

Persistence & Privilege

always is false, the skill doesn't request persistent/system-wide changes, and it does not modify other skills or agent-wide configurations.

Assessment

This skill appears to do exactly what it says: convert coordinates using the gcoord npm library. Before installing, ensure the agent environment has Node.js (index.js is invoked with `node`; package.json lists node >=16.11.0 in the dependency entry), and be prepared to run `npm install` (the package-lock references the npmmirror registry — a common mirror, but if you prefer the official registry you can run installation against registry.npmjs.org). There are no requested credentials or external endpoints and tests only run the local CLI. If you operate in a restricted environment, verify Node availability and dependency installation policy; otherwise this skill is internally coherent and low-risk.

Gcoord - 地理坐标系转换

Overview

处理中国互联网地图坐标系不统一的问题，支持 WGS84/GCJ02/BD09/BD09MC/WebMercator 等坐标系之间的精确转换。

When to Use

digraph gcoord_flow {
    "Need to convert coordinates?" [shape=diamond];
    "Using Chinese map service?" [shape=diamond];
    "Use this skill" [shape=box];
    "Use standard tools" [shape=box];

    "Need to convert coordinates?" -> "Using Chinese map service?" [label="yes"];
    "Using Chinese map service?" -> "Use this skill" [label="yes"];
    "Using Chinese map service?" -> "Use standard tools" [label="no"];
}

Use when:

• GPS 坐标需要显示在高德/百度/腾讯地图上
• 从一个地图平台切换到另一个平台
• 统一不同来源的坐标数据
• 处理 GeoJSON 或批量坐标数据

Coordinate Systems Reference

代码	中文名称	别名	适用平台
WGS84	地球坐标系	GPS, wgs84, 地球坐标	GPS 设备原始坐标
GCJ02	火星坐标系	高德, amap, 腾讯, gcj02, 火星坐标	高德地图、腾讯地图
BD09	百度坐标系	百度, baidu, bd09	百度地图
BD09MC	百度米制坐标	bd09mc, 百度米制	百度地图米制
WebMercator	墨卡托投影	墨卡托, webmercator, epsg3857	Web 地图投影

Supported Input/Output Formats

格式	示例	说明
坐标数组	[116.403988, 39.914266]	JSON 数组格式
单点坐标	116.403988, 39.914266	逗号或空格分隔
GeoJSON	{ "type": "Point", "coordinates": [...] }	完整 GeoJSON 对象
批量文本	每行一个坐标	多行文本处理

输出格式默认与输入格式相同。

Usage Examples

Command Format

/gcoord [坐标] --from [源坐标系] --to [目标坐标系]

# 示例
/gcoord 116.403988,39.914266 --from wgs84 --to bd09
/gcoord [116.403988, 39.914266] from gps to 百度

Natural Language Format

"帮我把这个坐标转换成高德坐标系"
"GPS 坐标转百度地图"
"WGS84 转 GCJ02"

Interactive Examples

# Missing parameters - Claude will prompt
"帮我转换坐标 116.403988,39.914266"
→ Claude prompts for source and target coordinate systems

# Clear target from context
"把 116.403988,39.914266 在百度地图上显示"
→ Claude only asks for source (target is clearly BD09)

# Explicit parameters - no prompts
/gcoord 116.403988,39.914266 --from WGS84 --to BD09
→ Direct conversion, no questions asked

Interactive Parameter Selection

When to Ask User

在使用 AskUserQuestion 工具前，先尝试从用户输入中推断坐标系。只有在无法推断时才询问：

优先级判断:

1. 命令行参数明确指定 (--from, --to)
2. 自然语言中明确提及 (GPS、高德、百度、WGS84、GCJ02 等)
3. 上下文推断 (文件名如 *-gcj02.geojson、前文对话)
4. 无法推断 → 使用 AskUserQuestion

Question Format

当需要询问坐标系时，使用以下格式：

源坐标系询问:

AskUserQuestion({
  questions: [{
    question: "请选择源坐标系（您当前的坐标使用什么坐标系？）",
    header: "源坐标系",
    multiSelect: false,
    options: [
      {
        label: "WGS84 (GPS)",
        description: "GPS 设备原始坐标，地球坐标"
      },
      {
        label: "GCJ02 (高德/腾讯)",
        description: "高德地图、腾讯地图坐标系"
      },
      {
        label: "BD09 (百度)",
        description: "百度地图坐标系"
      },
      {
        label: "BD09MC (百度米制)",
        description: "百度地图米制坐标"
      },
      {
        label: "WebMercator (墨卡托)",
        description: "Web 地图投影坐标"
      }
    ]
  }]
})

目标坐标系询问:

• 使用相同的选项
• 修改 question 为 "请选择目标坐标系（您要转换到哪个坐标系？）"
• header 改为 "目标坐标系"

Natural Language Recognition Patterns

在询问前，检查用户是否通过自然语言指定了坐标系：

源坐标系关键词:

• "GPS坐标", "WGS84", "地球坐标", "原始坐标" → WGS84
• "高德", "腾讯", "火星坐标", "gcj02" → GCJ02
• "百度", "baidu", "bd09" → BD09
• "墨卡托", "Web Mercator" → WebMercator

目标坐标系关键词:

• "转成高德", "在高德地图显示", "for Amap" → GCJ02
• "转成百度", "在百度地图显示", "for Baidu" → BD09
• "转成GPS", "转成WGS84", "to WGS84" → WGS84

Interaction Examples

场景 1: 完全未指定

用户: 帮我转换 116.403988,39.914266

Claude:
1. 无法从输入推断源和目标坐标系
2. 询问源坐标系 → 用户选择: WGS84
3. 询问目标坐标系 → 用户选择: GCJ02
4. 调用: node index.js --input "116.403988,39.914266" --from WGS84 --to GCJ02

场景 2: 仅指定目标

用户: 把 116.403988,39.914266 在百度地图上显示

Claude:
1. 从上下文推断: 目标 = BD09 (明确)
2. 源坐标系不明确 → 询问用户
3. 用户选择: WGS84
4. 调用: node index.js --input "116.403988,39.914266" --from WGS84 --to BD09

场景 3: 明确指定（不询问）

用户: GPS转高德: 116.403988,39.914266

Claude:
1. 从自然语言识别: 源=WGS84, 目标=GCJ02
2. 直接调用: node index.js --input "116.403988,39.914266" --from WGS84 --to GCJ02

Implementation

对于精确转换，使用 index.js 脚本调用 gcoord 库：

node index.js --input "[116.403988, 39.914266]" --from WGS84 --to BD09

Common Mistakes

错误	正确做法
GPS 坐标直接放百度地图	先转为 BD09 坐标系
混淆经度纬度顺序	始终是 [经度, 纬度]
忘记 GeoJSON 是原地修改	转换后原始对象会改变

Legal Notice

使用时请遵守《中华人民共和国测绘法》和 GB 20263―2006 标准。