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geo_heatmap.py
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geo_heatmap.py
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#!/usr/bin/env python3
import collections
import json
import os
import sys
import webbrowser
import folium
from folium.plugins import HeatMap
from progressbar import ProgressBar, Bar, ETA, Percentage
from xml.dom import minidom
TEXT_BASED_BROWSERS = [webbrowser.GenericBrowser, webbrowser.Elinks]
class Generator:
def __init__(self):
self.coordinates = collections.defaultdict(int)
self.max_coordinates = (0, 0)
self.max_magnitude = 0
def loadData(self, file_name):
"""Loads the google location data from the given json file.
Arguments:
file_name {string} -- The name of the json file with the google
location data.
"""
with open(file_name) as json_file:
data = json.load(json_file)
w = [Bar(), Percentage(), ' ', ETA()]
with ProgressBar(
max_value=len(data["locations"]),
widgets=w) as pb:
for (i, loc) in enumerate(data["locations"]):
if "latitudeE7" not in loc or "longitudeE7" not in loc:
continue
lat = round(loc["latitudeE7"] / 1e7, 6)
lon = round(loc["longitudeE7"] / 1e7, 6)
self.coordinates[(lat, lon)] += 1
if self.coordinates[(lat, lon)] > self.max_magnitude:
self.max_coordinates = (lat, lon)
self.max_magnitude = self.coordinates[(lat, lon)]
pb.update(i)
def loadKMLData(self, file_name):
"""Loads the google location data from the given KML file.
Arguments:
file_name {string} -- The name of the KML file with the google
location data.
"""
with open(file_name) as kml_file:
xmldoc = minidom.parse(file_name)
kml = xmldoc.getElementsByTagName("kml")[0]
document = kml.getElementsByTagName("Document")[0]
placemark = document.getElementsByTagName("Placemark")[0]
gxtrack = placemark.getElementsByTagName("gx:coord")
w = [Bar(), Percentage(), ' ', ETA()]
with ProgressBar(
max_value=len(gxtrack),
widgets=w) as pb:
i = 0
for number in gxtrack:
lon = (number.firstChild.data).split()[0]
lat = (number.firstChild.data).split()[1]
i = i + 1
self.coordinates[(lat, lon)] += 1
if self.coordinates[(lat, lon)] > self.max_magnitude:
self.max_coordinates = (lat, lon)
self.max_magnitude = self.coordinates[(lat, lon)]
pb.update(i)
def generateMap(self, map_zoom_start=6, heatmap_radius=7,
heatmap_blur=4, heatmap_min_opacity=0.2,
heatmap_max_zoom=4):
"""Generates a heatmap and saves it in the output_file.
Arguments:
output_file {string} -- The name of the output file.
"""
map_data = [(coords[0], coords[1], magnitude)
for coords, magnitude in self.coordinates.items()]
# Generate map
m = folium.Map(location=self.max_coordinates,
zoom_start=map_zoom_start,
tiles="OpenStreetMap")
# Generate heat map
heatmap = folium.plugins.HeatMap(
map_data,
max_val=self.max_magnitude,
min_opacity=heatmap_min_opacity,
radius=heatmap_radius,
blur=heatmap_blur,
max_zoom=heatmap_max_zoom)
m.add_child(heatmap)
return m
def run(self, data_file, output_file):
"""Load the data, generate the heatmap and save it.
Arguments:
data_file {string} -- The name of the json file with the google
location data.
output_file {[type]} -- The name of the output file.
"""
if(data_file.endswith('.json')):
print("Loading data from {}...".format(data_file))
self.loadData(data_file)
elif(data_file.endswith('.kml')):
print("Loading data from {}...".format(data_file))
self.loadKMLData(data_file)
print("Generating heatmap...")
m = self.generateMap()
print("Saving map to {}...".format(output_file))
m.save(output_file)
def isTextBasedBrowser(browser):
"""Returns if browser is a text-based browser.
Arguments:
browser {webbrowser.BaseBrowser} -- A browser.
Returns:
bool -- True if browser is text-based, False if browser is not
text-based.
"""
for tb_browser in TEXT_BASED_BROWSERS:
if type(browser) is tb_browser:
return True
return False
if __name__ == "__main__":
if len(sys.argv) > 1:
data_file = sys.argv[1]
output_file = "heatmap.html"
generator = Generator()
generator.run(data_file, output_file)
# Check if browser is text-based
if not isTextBasedBrowser(webbrowser.get()):
print("Opening {} in browser...".format(output_file))
webbrowser.open('file://' + os.path.realpath(output_file))
else:
print("Usage: python geo_heatmap.py <file>")
sys.exit()