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QGIS Python Programming Cookbook, Second Edition
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In this recipe, we'll perform a spatial operation to select the subset of a point layer based on the points contained in an overlapping polygon layer. We'll use shapefiles in both the cases, with one being a point layer and the other a polygon. This kind of subset is one of the most common GIS operations.
We will need two new shapefiles that have not been used in the previous recipes. You can download the point layer from https://github.com/GeospatialPython/Learn/raw/master/MSCities_Geo_Pts.zip.
Similarly, you can download the geometry layer from https://github.com/GeospatialPython/Learn/raw/master/GIS_CensusTract.zip.
Unzip these shapefiles and place them in a directory named ms
within your qgis_data
directory, within your root or home directory.
In this recipe, we will perform several steps to select features in the point layer that fall within the polygon layer, as follows:
First, load the point layer:
lyrPts = QgsVectorLayer...