Deliverable rejected because coordinates were never converted to CGCS2000

• Rejection note: the deliverable must be in CGCS2000 (EPSG:4490) but was measured as WGS 84 (EPSG:4326), with positional RMSE 1.42 m against a 0.05 m tolerance
• `ogrinfo -al -so result.shp` reports `SRS: EPSG:3857 - WGS 84 / Pseudo-Mercator`
• Overlaying the result on compliant data shows no obvious shift, so the mismatch passed visual review

1. Read the `.prj` or run `ogrinfo -al -so` on the deliverable to see the declared SRS
2. Check whether the pipeline went through EPSG:3857 instead of a datum transformation
3. Compare three known control points with known values and compute residuals
4. Confirm whether four- or seven-parameter transformation records exist
5. Confirm the required target CRS and Gauss-Kruger zone for the project

Transform with proj4 `defs('EPSG:4490', '+proj=longlat +ellps=GRS80 +no_defs +type=crs')` from EPSG:4326; for plane coordinates use a Gauss-Kruger zone such as EPSG:4547 (`+proj=tmerc +lon_0=117 +x_0=500000 +ellps=GRS80`), and submit the parameter file with residuals.

成果坐标系应为 2000 国家大地坐标系（EPSG:4490），
实测数据坐标系为 WGS 84（EPSG:4326），未附转换参数与检核记录。
平面位置中误差 1.42 m，超过 0.05 m 限差，判定不合格。

# 用 ogrinfo 查看数据坐标系
ogrinfo -al -so survey.gpkg
# Geometry: Point
# SRS: EPSG:4326 - WGS 84

ogrinfo -al -so result.shp
# SRS: EPSG:3857 - WGS 84 / Pseudo-Mercator

• Using Web Mercator (EPSG:3857) as a stand-in for a planar CGCS2000 deliverable; its spherical approximation adds metre-level error
• Judging compliance by eye, since a decimetre-to-metre shift is invisible at city scale but fails the 0.05 m limit