Spatial Data Sources > Vector Data Sources

Read	Yes
Write	Yes

JMap Server can connect to Microsoft SQLServer Spatial databases to extract spatial data and attributes that can be used as a spatial data source. The only special requirement is the presence of a numeric column with unique integer values to be used as element identifiers. An SQL query must be provided. This query will be executed to read the data and it can access one or many tables at the same time.

The connection to the database must be already configured. See Creating Databases for more information.

Parameters
Database	Select the SQLServer Spatial database to read the data from. It must be already configured in JMap Admin.
SQL query	Enter the SQL query used to extract geometries and attributes from the database.
Geometry table	Select the physical table that effectively contains the geometries. Pressing Load will retrieve the list of fields returned by the query. This is necessary for the rest of the configuration.
Geometry field	Select the field that contains the geometries.
Id field	Select a field that contains unique identifiers. Only integer fields are listed.
Automatically convert to valid geometry	When this option is active, the geometries will automatically be converted using the SQL MakeValid function. Note that the result can therefore differ from the original geometry, as the function will alter invalid geometries. This option also requires a valid SRID, so a projection must be specified for the data source. MakeValid is not supported by all SQL Server versions, please consult SQL Server's help to confirm the compatibility of the function for the geometries or geographies and your particular SQL Server version. Activating this option without meeting these criteria will result in an error during the insertion or updating of the data.
Creation time field	(Optional) If you want this data source to be editable by JMap, this field will show the creation date of each object. If no field is selected, the data can still be edited, but this information will not be maintained.
Modification date field	(Optional) If you want this data source to be editable by JMap, this field will contain the date each object was last modified. If no field is selected, the data can still be edited, but this information will not be maintained.
Author field	(Optional) If you want this data source to be editable by JMap, this field will either contain the name of the user who created each object or the name of the user who made the last change. If no field is selected, the data can still be edited, but this information will not be maintained.

Note: The projection system selected for the spatial data source must exactly match the spatial reference identifier (SRID, e.g. EPSG) of the elements of the table, for the elements to be displayed.