From ccaaace1a9b73cde2c34df02f4899e2f3f026fa5 Mon Sep 17 00:00:00 2001
From: Huawei <huawei@mercator.cn>
Date: Thu, 9 Jul 2026 15:10:31 +0000
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+# 缓冲区分析套件
+
+## 功能
+
+对 GeoJSON 中的地块做缓冲区分析，输出处理前后的面积对比报告。
+
+## workflow.yaml
+
+```yaml
+name: parcel-analysis
+description: 地块数据批处理 — 生成→验证→缓冲区→对比→报告
+version: 2.0.0
+category: gis-processing
+tags: [gis, parcel, buffer]
+
+params:
+  type: object
+  required:
+    - buffer_distance
+  properties:
+    buffer_distance:
+      type: number
+      default: 0.5
+      description: 缓冲区距离（度）
+
+steps:
+  - id: main
+    name: 全流水线
+    script_id: process
+    params:
+      buffer_distance: "${{inputs.buffer_distance}}"
+
+resolved_params:
+  - step_index: 0
+    step_name: 全流水线
+    params:
+      buffer_distance: 0.5
+```
+
+## 处理流程
+
+5 个阶段在单脚本中顺序执行：
+
+| 阶段 | 功能 | 产出 |
+|------|------|------|
+| Phase 1 | 生成 3 个示例地块 GeoJSON | `input_parcels.geojson` |
+| Phase 2 | 验证 GeoJSON 结构、统计要素 | 校验报告 |
+| Phase 3 | 缓冲区分析（顶点偏移算法） | `buffered_parcels.geojson` |
+| Phase 4 | 计算每个地块处理前后的面积变化 | 面积对比 JSON |
+| Phase 5 | 生成完整的对比报告 | `comparison_report.json` |
+
+## 输出示例
+
+```json
+{
+  "areas": [
+    {"id": "P001", "before": 0.02, "after": 0.308, "change_pct": 1439.34},
+    {"id": "P002", "before": 0.018, "after": 0.327, "change_pct": 1717.11}
+  ],
+  "total_before": 0.056,
+  "total_after": 0.962,
+  "total_change_pct": 1617.91
+}
+```