128 lines
4.8 KiB
Python
Executable File
128 lines
4.8 KiB
Python
Executable File
#! /usr/bin/env python
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# -*- coding: utf-8 -*-
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'''
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Script to lookup city names of events with Nominatim service
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The input should be an valid quakeML file passed to stdin.
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The output will will be a javascript structure to be included in the
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SeisObs map service.
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The script should be updated regulary keep the total number of all
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AJAX calls to the Nominatim service small, e. g. :
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curl -s "https://ariadne.geophysik.ruhr-uni-bochum.de/fdsnws/event/1/query?minlat=50&maxlat=54&minlon=3&maxlon=10&minmag=1" | mkGeolocationTable.py > geolocationTable.js
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License
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Copyright 2014 Kasper D. Fischer <kasper.fischer@rub.de>
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with this program. If not, see http://www.gnu.org/licenses/.
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$Id$
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'''
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def mkGeolocationTable(file=''):
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# imports
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try:
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import xml.etree.cElementTree as ET
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except ImportError:
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import xml.etree.ElementTree as ET
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from sys import stdin
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import warnings
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from time import sleep
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from geopy.geocoders import Photon
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import urllib2 as URL
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import json as JSON
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# constants
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namespaces = {'sc3': 'http://geofon.gfz-potsdam.de/ns/seiscomp3-schema/0.7',
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'qml': 'http://quakeml.org/xmlns/bed/1.2'}
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def simple_warning(message, category, filename, lineno, file=None, line=None):
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return 'Warning: %s\n' % (message)
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warnings.formatwarning = simple_warning
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# try loading the file
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geolocationTable = {}
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if file :
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try:
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jsonfile = open(file)
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jsonfileContent = jsonfile.read().split('=')[1].replace(';', '')
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geolocationTable = JSON.loads(jsonfileContent)
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except:
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geolocationTable = {}
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warnings.warn('Could not parse file %s' %file)
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# parse event.xml
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DOM = ET.parse(stdin).getroot()
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geolocator = Photon()
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# iterate over all events
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for event in DOM.iterfind('qml:eventParameters/qml:event', namespaces):
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publicID = event.attrib['publicID'].split('/')[2]
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lat = event.find('./qml:origin/qml:latitude/qml:value', namespaces).text
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lng = event.find('./qml:origin/qml:longitude/qml:value', namespaces).text
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evaluationMode = event.find('./qml:origin/qml:evaluationMode', namespaces).text
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if publicID in geolocationTable:
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warnings.warn('Skipping cached event %s' %(publicID))
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elif evaluationMode == 'automatic':
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warnings.warn('Skipping automatic event %s' %(publicID))
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else:
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try:
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location = geolocator.reverse("{lat}, {lng}".format(lat=lat, lng=lng))
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except:
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warnings.warn('Reverse Geolocation failed. Skipping event.')
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sleep(1.1)
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continue
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place = []
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try:
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place = location.raw['properties']['city']
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except KeyError:
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try:
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place = location.raw['properties']['town']
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except KeyError:
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try:
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place = location.raw['properties']['village']
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except KeyError:
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try:
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place = location.raw['properties']['county']
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except KeyError:
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warnings.warn('Could not extract city for event {0} at {1} N / {2} E (URL: {3})'.format(publicID, lat, lng, url))
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warnings.warn('Sucessfully looked up location for event {0}.'.format(publicID))
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geolocationTable[publicID] = place
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sleep(1.1)
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# dump json
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print 'var geolocationTable = '+JSON.dumps(geolocationTable, sort_keys=True)+';'
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# __main__
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if __name__ == "__main__":
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def printline(line):
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print line
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# parse arguments
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import argparse
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versionText = '$Revision$ ($Date$, $Author$)'.replace('$', '').replace(':','')
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parser = argparse.ArgumentParser(
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description='Reverese geocoding lookup of events in xml format (stdin).',
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epilog=versionText)
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parser.add_argument('-v', '-V', '--version', action='version',
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version=versionText)
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parser.add_argument('-f', '--file', action='store', dest='file',
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help='read in JSON file containing old output.')
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cla = parser.parse_args()
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# call mkGeolocationTable(...)
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mkGeolocationTable(file=cla.file)
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