---
title: CSV 编码自动识别不能只靠 GBK 解码报错
type: experience
permalink: main/projects/8e229c96-a83b-4a02-ac40-10a0a9da444e/csv-编码自动识别不能只靠-gbk-解码报错
stable_id: ffa069f7-a3c2-4acc-a4ec-fef9b5f87c80
scope: project
memory_type: experience
project_id: 8e229c96-a83b-4a02-ac40-10a0a9da444e
usage_profile_id: 7aee455b-24cc-4008-bdaf-443721e6f939
status: active
revision: 1
request_id: exp-csv-encoding-autodetect
created_at: '2026-09-17T01:38:38.591136+00:00'
updated_at: '2026-09-17T01:38:38.591136+00:00'
tags:
- encoding
- buildings
---

GetNRBuildingsData.detect_encoding(path, preferred)：读 1MB 样本，按最后换行截断；有 BOM 或含非 ASCII 且能严格 UTF-8 解码 → utf-8-sig，否则 gbk；纯 ASCII 用首选；再验表头 WKT/building_id，不行就试其余候选，都不行才报错。原因：GBK 对 UTF-8 字节很宽容，不能靠解码报错判断。validation 把判定结果写回 params[INPUT_ENCODING] 供 worker 使用。当前 source/NRBuildPolygon.csv 实际为纯 ASCII（无 BOM），gbk/utf-8 等价。