Rendering Map Fails at ~3000 Markers

Please add a code sample or a nbviewer link, copy-pastable if possible

import folium
import json
import os
import numpy

from folium.plugins import MarkerCluster

m = folium.Map(
    location=[0, 0],
    zoom_start=2,
    tiles='http://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}',
    attr='Tiles © Esri — Source: Esri, i-cubed, USDA, USGS, AEX, GeoEye, Getmapping, Aerogrid, IGN, IGP, UPR-EGP, and the GIS User Community'
)

marker_cluster = MarkerCluster().add_to(m)

random_marker_count=3000        
colors = numpy.random.randint(low=0, high=0xFFFFFF, size=(random_marker_count,1))
lats = numpy.random.random_sample(random_marker_count)
longs = numpy.random.random_sample(random_marker_count)

for i in range(0, random_marker_count):
    lat = ((lats[i]*2) - 1) * 90
    long = ((longs[i]*2) - 1) * 180
    coor = [lat,long]
    c = "#%06x" % colors[i][0]
    folium.CircleMarker(
        location=coor,
        fill=True,
        radius=5,
        color=c,
        fill_color=c
    ).add_to(marker_cluster)

m

Problem description

Somewhere around 3000 markers I can no longer render the map. I can see the cell, it just never populates. Not seeing any errors in the logs.

Am I creating these data points incorrectly? Perhaps I should be loading a GeoJSON layer instead? This was intended to be a simple scaling test.

Expected Output

Map renders in a < 5 seconds.

I’d expect issues at 10,000’s or 100,000’s of markers, not 1000’s.

Output of folium.__version__

'0.5.0'

[anderl80]

What is the preferred way with folium to create a big data marker map with more than ~3000 markers? ClusterMarker is not an option as this visually distorts the information I want to display.

[sherl0cks]

What do you mean by 'saving the result`?

I think you hit this on the head with server side / headless approach.

At this point, I have the information I need. Thanks for your help. Closing