Can a blob be displayed as an image in QGIS?
Since version 3.8, QGIS allows storing binary (blob) data inside a gpkg and accessing it with a binary widget. Unfortunately, so far it seems this widget only allows importing or exporting the blob data, not other manipulation. Any ideas how to display it as an image?
How to display photos stored as blob in GPKG?
To display the photo stored as blob in GPKG or PostgreSQL, one simple solution is to use QGIS HTML Widget. It is a widget to be used in forms. It can be used also for a table without geometries. Add a HTML Widget to the form
How to create a QML widget in QGIS?
In the Attribute Form configuration in the Layer Properties you have first to activate the drag and drop designer. Not only can you drag the field- and relation-items from the available widget list to the form layout list, but also a QML Widget. When you drop this item, it creates an “instance” of a QML Widget.
How to use form design functionality in QGIS?
Follow Along: Using QGIS’ Form Design Functionality ¶ Select the roads layer in the Layers list. Enter Edit Mode as before. Open its Attribute Table. Right-click on any cell in the table. A short menu will appear, with the only entry being Open form. Click on it to see the form that QGIS generates for this layer.
How do you load a layer in QGIS?
Similarly to vector layers, raster layers can be loaded using the addRasterLayer function of the QgisInterface object: iface.addRasterLayer(path_to_tif, “layer name you like”) This creates a new layer and adds it to the current project (making it appear in the layer list) in one step. To load a PostGIS raster:
How to add spatial layers to PostGIS database?
You may also use the QGIS Browser Panel to navigate through the now connected PostGIS database and list the schemas and tables. This panel allows you to double-click to add spatial layers to the current project, providing a better user experience not only of connected databases, but on any directory of your machine: How it works…