DbGeography和SRID 104001的EF错误

Question

数据库表：

,[Location] GEOGRAPHY

使用SRID 104001通过EF更新位置

item.Location = System.Data.Entity.Spatial.DbGeography.PointFromText($"Point({loc.Lng} {loc.Lat})", 104001);

例外：

24204：空间参考标识符（SRID）无效。指定的SRID必须与sys.spatial_reference_systems目录视图中显示的支持的SRID之一匹配。

数据库检查：

SELECT * FROM sys.spatial_reference_systems WHERE spatial_reference_id = 104001

104001  Microsoft   104001  GEOGCS["Unit Sphere", DATUM["Unit Sphere", SPHEROID["Sphere", 1.0, 0.0]], PRIMEM["Greenwich",0.0], UNIT["Degree", 0.0174532925199433]]  radian  1

使用方法：

.Net Framework 4.6.1;
Entity Framework 6.1.3;
Microsoft SQL Server 2014 (SP2-GDR) (KB3194714) - 12.0.5203.0 (X64)   Sep 23 2016 18:13:56   Copyright (c) Microsoft Corporation  Standard Edition (64-bit) on Windows NT 6.3 <X64> (Build 9600: ) ;
Database Compatibility level 120