[GIS] How to create a multipoint geometry in QGIS

geometryqgisspatialite

I've got a Spatialite layer in QGIS with geometry type MULTIPOINT. Now I'd like to add some data in this table in the 'usual' way, so by doing multiple clicks in the map (e.g. left-click, left-click, right-click -> enter attribute values in the popup dialog for creating a record with a 3-points geometry. However, QGIS only allows me to add a single point by popping up the attribute dialog right after the first left-click.

How to do this in the GUI? (I don't want to enter coordinates by hand in a query 🙂 )

Best Answer

You should proceed as if you are working with a polygon with multiple parts.

Start editing your layer;
Add a point;
Enter the attributes in the form and press ok;
Select that point with any selection tool;
Click on "Add part", in the Advanced Digitalizing toolbar;

After that you can add as many point as you want to your multipoint feature, without the need to fill the attributes.

Hope it helps!

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If you're after a GUI solution, you can use the "Add Part" tool (QGIS >=2.2 only). First, make your layer editable. Then in an Attribute Table select a single row with a null geometry that you want to add a geometry to. Back in the map canvas, select the "Add Part" tool and draw your geometry. The null geometry will be replaced by your newly drawn shape.

[GIS] How to create a vector layer in PyQGIS from a table without geom column

Finally, I got it working. My analysis seems right. The parentheses in the uri cause the problem. I've solved it as follows:

>>> uri2 = QgsDataSourceURI(uri.uri().remove(' ()'))
>>> vlayer = QgsVectorLayer(uri2.uri(), 'TestLayer', 'spatialite')
>>> vlayer.isValid()
True

It looks like this problem does not occur in QGIS 1.9 >.

Best Answer

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