Removing data from a vector layer
In this recipe, we'll completely remove a feature, including its geometry and attributes, from a layer.
Getting ready
You will need the New York City museums shapefile used in other recipes, which you can download as a ZIP file from the following URL:
https://github.com/GeospatialPython/Learn/raw/master/NYC_MUSEUMS_GEO.zip
Extract this shapefile to /qgis_data/nyc
.
How to do it....
All we need to do is load the layer and then delete the desired features by ID using the layer's data provider:
- Start QGIS.
- From the Plugins menu, select Python Console.
- First, we load and validate the layer:
vectorLyr = QgsVectorLayer('/qgis_data/nyc/NYC_MUSEUMS_GEO.shp', 'Museums' , "ogr") vectorLyr.isValid()
- Next, we specify a Python list ...
Get QGIS Python Programming Cookbook - Second Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.