SQL 数据库中的表 dbo.geometry.columns 和 dbo.spatial_ref_sys 是做什么用的？

Question

I discovered the new tables dbo.geometry_columns and dbo.spatial_ref_sys in my SQL database (see image). It looks like they have been automatically created as I did not do it on purpose. I assume that it is caused by me having created some columns of type geometry in some tables and views. Are these automatically created tables which are mandatory for operation with columns of type geometry ?

I am using "Microsoft SQL Server 2017" with "SQL Server Management Studio v18.4" on "Windows Server 2012 R2 Standard 6.3".

Answer 1

From https://alastaira.wordpress.com/ogr2ogr-patterns-for-sql-server/

"After importing any data, OGR2OGR will create two additional tables in your SQL Server database – spatial_ref_sys and geometry_columns, which store metadata about the spatial columns in the tables. These tables can be safely ignored (or deleted) – OGR2OGR will recreate them after each conversion anyway"