Hi I am trying to Find the center point of multiple co-ordinates and then join the resultant data back to the main data set, this is what I have so far
Sample data
coords1=pd.DataFrame({'pickup_latitude':[12.807895,12.82166,12.821675,12.82168,12.821697,12.8217,12.821718,12.821722,12.821751,12.821771,12.821782,12.821794,12.821828,12.821873,12.821892,12.821892,12.821929,12.821935,12.821947,12.821979],'pickup_longitude':[77.590877,77.658981,77.660594,77.660634,77.657854,77.657992,77.659848,77.660243,77.659244,77.658826,77.660763,77.660614,77.659569,77.660678,77.659861,77.660629,77.660488,77.660537,77.657746,77.66077]})
The code I have have so far
import pandas as pd, numpy as np, matplotlib.pyplot as plt
from sklearn.cluster import DBSCAN
from geopy.distance import great_circle
from shapely.geometry import MultiPoint
ms_per_radian = 6371.0088
epsilon = 0.00001
db = DBSCAN(eps=epsilon, min_samples=1, algorithm='ball_tree', metric='haversine').fit(np.radians(coords))
cluster_labels = db.labels_
num_clusters = len(set(cluster_labels))
clusters = pd.Series([coords[cluster_labels == n] for n in range(num_clusters)])
print('Number of clusters: {}'.format(num_clusters))
def get_centermost_point(cluster):
centroid = (MultiPoint(cluster).centroid.x, MultiPoint(cluster).centroid.y)
centermost_point = min(cluster, key=lambda point: great_circle(point, centroid).m)
return tuple(centermost_point)
centermost_points = clusters.map(get_centermost_point)
lats, lons = zip(*centermost_points)
rep_points = pd.DataFrame({'lon':lons, 'lat':lats})
rep_points.tail()
rs = rep_points.apply(lambda row: Lat_Long_pick[(Lat_Long_pick['pickup_latitude']==row['lat'])&(Lat_Long_pick['pickup_longitude']==row['lon'])].iloc[0], axis=1)
How do I now Join rs back to Lat_Long_pick or coords1
IF you facing problem merging then You can merge two dataframe like below or if issue if different please comment
left = pd.DataFrame({'key': ['K0', 'K1', 'K2'],
'A': ['A0', 'A1', 'A2'],
'B': ['B0', 'B1', 'B2']})
right = pd.DataFrame({'key': ['K0', 'K1', 'K2'],
'C': ['C0', 'C1', 'C2'],
'D': ['D0', 'D1', 'D2']})
df = pd.merge(left, right, on='key')
df
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