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How does geography type work in SQL Server?
The geography spatial type helps organize geospatial mapping data into SQL Server tables and works with several SQL-native graphing functions to answer questions like how far apart two geographic locations are, or what locations fall within a certain radius.
How does ArcGIS create spatial index in SQL Server?
SQL Server requires the table to have a primary key to be able to create a spatial index on it. When you use ArcGIS to create a feature class with a geometry or geography column, ArcGIS creates a clustered primary key on the ObjectID column of the business table by default. Next, ArcGIS builds a spatial index using SQL Server defaults.
How to export spatial data from SQL Server?
Here’s what the contents of this table looks like in the SSMS Spatial Results tab: The basic pattern for OGR2OGR usage is given at http://www.gdal.org/ogr2ogr.html, with additional usage options for the SQL Server driver at http://www.gdal.org/ogr/drv_mssqlspatial.html.
How to export shapefile from SQL Server to Esri?
Around another 200 people have come here after searching for variations and combinations on this theme, including “OGR2OGR Sql Server”, “OGR2OGR MSSqlSpatial”, “OGR SQL”, “OGR Import shapefile” etc. What I’m not sure, though, is how to interpret this statistic or best act upon it.
What kind of data is stored in geography?
The geography spatial data type, geography, represents data in a round-earth coordinate system. This type is implemented as a .NET common language runtime (CLR) data type in SQL Server. The SQL Server geography data type stores ellipsoidal (round-earth) data, such as GPS latitude and longitude coordinates.
Are there other spatial data types in SQL?
Other spatial data types are described here: https://docs.microsoft.com/en-us/sql/relational-databases/spatial/spatial-data-sql-server?view=sql-server-2017 Geography data types are more than just data types, they are objects, and therefore have methods.
How to make sense of geography data type?
Your geography columns can have different SRIDs. Note that when you perform operations on two geography instances, like measuring their distances. Both instances should have the same SRID, or it will return you NULL. After learning about WKT and SRID, creating a geography instance requires a method called STGeomFromText.