本文详细解析了在ArcGIS中遇到Unknown Spatial Reference错误的原因及解决方案，包括错误信息、产生原因和解决或规避方法。
ArcGIS Unknown Spatial Reference问题解疑
shp文件在Arcgis打开后经常因为原有坐标系无法识别而丢失信息，出现以下提示信息：
"Unknown Spatial Reference
The following data sources you added are missing spatial reference information. This data can be drawn in ArcMap, but cannot be projected."
The following data sources you added are missing spatial reference information. This data can be drawn in ArcMap, but cannot be projected."
今天偶然见终于找到了解决方法。先给出ESRI Supporter Center关于这个问题给出的解决方法：
***********************************************************************************************************
Error: Unknown Spatial Reference
| Article ID: | 31999 |
|---|---|
| Software: | ArcGIS - ArcEditor 9.0, 9.1, 9.2 ArcGIS - ArcInfo 9.0, 9.1, 9.2 ArcGIS - ArcView 9.0, 9.1, 9.2 |
| Platf |
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