Random Point Generation within Polygons in GeoDataFrame

This custom function generates a specified number of random points within the polygons of a given GeoDataFrame.

Technology Stack : GeoPandas, NumPy

Code Type : Custom function

Code Difficulty : Intermediate

                
                    
import geopandas as gpd
import numpy as np

def random_point_in_polygon(gdf, num_points=1):
    """
    Generate random points within polygons.

    Parameters:
    gdf (GeoDataFrame): A GeoDataFrame with Polygon geometry.
    num_points (int): Number of random points to generate. Default is 1.

    Returns:
    GeoDataFrame: A GeoDataFrame with the generated points.
    """
    random_points = []
    for idx, row in gdf.iterrows():
        polygon = row.geometry
        random_point = polygon.buffer(0).intersection(np.random.rand(1, 2) * polygon.bounds)
        random_points.append(random_point)

    return gpd.GeoDataFrame(random_points, geometry=True)