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generate_station_kml.py
#!/usr/bin/env python3
import redis
import xml.dom.minidom as minidom
def generate_placemark(doc, document, station):
"Generates a single place mark from a station"
placemark = doc.createElement('Placemark')
document.appendChild(placemark)
# create the placemark name
name = doc.createElement('name')
name.appendChild(doc.createTextNode(station['name']))
placemark.appendChild(name)
# create the placemark description
desc = doc.createElement('description')
desc.appendChild(doc.createTextNode("{} Bike share station." .format(station['name'])))
placemark.appendChild(desc)
placemark.childNodes[0]
# add point coords
point = doc.createElement('Point')
coords = doc.createElement('coordinates')
coords.appendChild(doc.createTextNode("{},{}".format(station['lon'], station['lat'])))
point.appendChild(coords)
placemark.appendChild(point)
def create_kml(r, system_id):
"Creates a KML files as a dom tree"
doc = minidom.Document()
kml = doc.createElementNS("http://www.opengis.net/kml/2.2", "kml")
document = doc.createElement('Document')
kml.appendChild(document)
doc.appendChild(kml)
# generate kml from only Bay Area Ford GoBike share
it = r.scan_iter(match="{}:station:*".format(system_id))
for key in it:
station = r.hgetall(key)
generate_placemark(doc, document, station)
return doc
if __name__ == '__main__':
r = redis.StrictRedis('localhost', 6379, decode_responses=True)
system_id = input("Enter system id: ")
doc = create_kml(r, system_id)
f = open('bikeshare.kml', 'w')
f.write(doc.toprettyxml(indent=' '))
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