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Posted on December 27, 2022 (Updated on July 10, 2025)

How to visualise generic geometry column from SpatiaLite database in QGIS

Hiking & Activities

How do I add a geometry column in Postgis?

To add a column to an existing table, use the ALTER TABLE DDL, e.g.: ALTER TABLE my_table ADD COLUMN the_geom_mercator geometry(Geometry,3857);

How do I view data in Qgis?

It’s available as:

  1. a Data Source Manager tab, enabled pressing the Open Data Source Manager button ( Ctrl+L );
  2. as a QGIS panel you can open from the menu View ‣ Panels (or Settings ‣ Panels) or by pressing Ctrl+2 .


What is a SpatiaLite Layer in QGIS?

QGIS is built for relational databases. It handles SQL queries elegantly and can read many common database formats. The simplest format, great for getting started, is Spatialite. A lightweight database that resides in a single file, Spatialite is portable and hassle-free.

How to create a spatial database in Qgis?

How to create a spatial database

  1. Open QGIS and the exploration panel. If the panel Browse is missing, click View | Panels , and click Browse .
  2. Create a new database Spatiality by clicking SpatiaLite and selecting. Create a database …
  3. Select the directory of your choice and name the new database, for example BaseTest.

 

How do I add PostGIS to QGIS?

Connect PostGIS to QGIS



Just open Layer > Add Layer > Add PostGIS Layer. From there you can enter the details about your database and connect it.
 

How do you add geometry in QGIS?

Very simple in QGIS, just go to the vector menu: vector | Geometry tools | Export/Add geometry columns, which will give you the following input screen: As you can see, you only need to add the path and name of the output shapefile and you are set.



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What are the main data types that can be visualize in QGIS?

QGIS uses the OGR library to read and write vector data formats, including ESRI shapefiles, MapInfo and MicroStation file formats, AutoCAD DXF, PostGIS, SpatiaLite, Oracle Spatial and MSSQL Spatial databases, and many more.

How do I view shapefile attributes?

Right click the layer and “view attribute table” to view the attribute data associated with the shapefile(or any supported vector format).
 

How to read geodatabase in QGIS?

QGIS users can read file geodatabases by dragging the geodatabases, ending in the extension . gdb, directly into the Layers pane. The geodatabase may appear as a folder and may not be selectable using the Add Vector Layer tool in QGIS.

What is a geometry column?

Definition. The Geometry_Columns function takes the name of a database table that is not registered with the geodatabase and returns the name of all spatial columns in the table.

How do I add a column field?

To insert a single column: Right-click the whole column to the right of where you want to add the new column, and then select Insert Columns. To insert multiple columns: Select the same number of columns to the right of where you want to add new ones. Right-click the selection, and then select Insert Columns.

What is geometry in PostGIS?

geometry is a fundamental PostGIS spatial data type used to represent a feature in planar (Euclidean) coordinate systems. All spatial operations on geometry use the units of the Spatial Reference System the geometry is in.

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