Randomizing Polygon Coordinates in GeoDataFrame

This function takes a GeoDataFrame containing polygons and returns a new GeoDataFrame with the coordinates of the polygons randomized within a certain range.

Technology Stack : GeoPandas, Pandas, NumPy, Matplotlib

Code Type : Function

Code Difficulty : Intermediate

                
                    
import geopandas as gpd
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt

def randomize_polygon_coordinates(polygon):
    """
    This function takes a GeoDataFrame with polygons and returns a new GeoDataFrame with the coordinates of the polygons randomized within a certain range.
    """
    def randomize_coordinates(row):
        # Get the polygon coordinates
        x_coords, y_coords = zip(*row['geometry'].exterior.coords)
        # Randomize the x and y coordinates within a range of 0.1
        x_coords = [x + np.random.uniform(-0.1, 0.1) for x in x_coords]
        y_coords = [y + np.random.uniform(-0.1, 0.1) for y in y_coords]
        # Create a new Polygon with randomized coordinates
        return gpd.Polygon([[x, y] for x, y in zip(x_coords, y_coords)])
    
    # Apply the randomize_coordinates function to each row of the GeoDataFrame
    polygon['geometry'] = polygon.apply(randomize_coordinates, axis=1)
    return polygon

# Example usage:
# Load a GeoDataFrame
gdf = gpd.read_file('path_to_shapefile.shp')
# Randomize the coordinates of the polygons
randomized_gdf = randomize_polygon_coordinates(gdf)