Vessel tracking the python way

Post author By Riccardo
Post categories In ArcGIS, Python, Webmapping

Let’s assume you like cruise ships, tanker, ferries or you’re so fortunate and own a fleet of vessels cruising over the oceans. But where the heck are the ones you’re interested in. First you can visit MarineTraffic and search for the Vessels you’re interested in. But what if you want to keep track of those vessels or if you want to put them on your “own” map. Now Python comes in handy and I’ll show you how to gather coordinates and put them on a map using the ArcGIS API for Python.

The used “Plattform”

For this task I am using a jupyter notebook as part of the ArcGIS API for Python. But the main steps can be done without the Esri part. We will grab all the data from a website called vesselfinder.com.

The Process of getting Vessel Data

First of all, we will need some modules for getting the web data and parsing it. Furthermore we will need some Pandas magic to prepare the data for the map:

#module import
import urllib.request
from bs4 import BeautifulSoup
import re
import pandas as pd
from datetime import datetime
import locale
locale.setlocale(locale.LC_ALL, 'en_US') #as we need to deal with names of monthes later on.
import os

As we do have all dependencies now, we will need some input for our workflow. Therefore I’Ve prepared a list of so-called IMO numbers of ships I would like to track. If you don’t know the IMO number of the ship of your choice… balticshipping might help.

IMOS = [9733612, 9391933, 9312834, 9722302, 9472529, 9288708]

As we do have everything set up, we will now make webcalls to the vesselfinder website and grab the details from the page (code from the webpage changed, so I updated the code snippet:

hdr = {'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11',
       'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
       'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.3',
       'Accept-Encoding': 'none',
       'Accept-Language': 'en-US,en;q=0.8',
       'Connection': 'keep-alive'}
items = []
for IMO in IMOS:
    url = r'https://www.vesselfinder.com/en/vessels/VOS-TRAVELLER-IMO-' + str(IMO)
    req = urllib.request.Request(url, None, hdr)
    with urllib.request.urlopen(req) as response:
        the_page = response.read()
    parsed_html = BeautifulSoup(the_page)
    tables = parsed_html.findAll("table")
    for table in tables:
        if table.findParent("table") is None:
            for row in table.findAll('tr'):
                aux = row.findAll('td')
                
                try:
                    if aux[0].string == "Coordinates":
                        coords = aux[1].string
                    if aux[0].string == "Vessel Name":
                        name = aux[1].string
                    if aux[0].string == "Position received":
                        print(aux[1].get("data-title"))
                        zeit = datetime.strptime(aux[1].get("data-title"), '%b %d, %Y %H:%M %Z')
                        print(zeit)
                except: 
                    print("strange table found")
    coordsSplit = coords.split("/")
    def dms2dd(degrees,direction):
        dd = float(degrees) ;
        if direction == 'S' or direction == 'W':
            dd *= -1
        return dd
    def parse_dms(dms):
        parts = re.split(' ', dms)
        lat = dms2dd(parts[0], parts[1])
        return lat
    lat = parse_dms(coordsSplit[0])
    lng = parse_dms(coordsSplit[1])
    items.append((lat, lng, name, zeit))

To keep track of our vessels we will store the found coordinates inside a simple textfile:

filename = 'ship_positions.txt'
if os.path.exists(filename):
    append_write = 'a' # append if already exists
    fw = open(filename,append_write)
else:
    append_write = 'w' # make a new file if not
    fw = open(filename,append_write)
    fw.write("lat;lng;name;time\n")
for item in items:
    fw.write("%3.5f;%3.5f;%s;%s\n" % item)
fw.close()

This will create a textfile with timestamps of ships and the associated coordinates

Putting it on a Map

As we have the coordinates in an array we can create a dataframe from those items and put them on a map:

#get it on a map:
from arcgis.gis import GIS
gis = GIS()
map = gis.map()
df = pd.DataFrame.from_records(items)
df.columns = ['y', 'x', 'name', 'zeit']
ships = gis.content.import_data(df)
map.add_layer(ships)
map.center = [lat, lng]
map

Doesn’t this look good:

Post date 2. October 2018
Tags API, ArcGIS, Jupyter, Python, vessel, Web
5 Comments on Vessel tracking the python way

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Robert

The tracking of your ship has been made easy with the marine traffic. The details here about vessel schedule and its tracking is helpful.

Guest

Shengda

Thank you Riccardo! This is exactly what I wish to do with Python. A small question here is that there is an error on my end when scrapping from vesselfinder. It seems we cannot locate the “Last report” information and define the “zeit” variable. One possible reason could be that there is a small wifi logo following the “Last report” (see https://www.vesselfinder.com/vessels/DELTA-VICTORY-IMO-9288708-MMSI-240290000). Can you please advise to help? Thanks.

Author

Riccardo

Hi Shengda, the website changed its structure so you need to update the code. : hdr = {‘User-Agent’: ‘Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11’, ‘Accept’: ‘text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8’, ‘Accept-Charset’: ‘ISO-8859-1,utf-8;q=0.7,*;q=0.3’, ‘Accept-Encoding’: ‘none’, ‘Accept-Language’: ‘en-US,en;q=0.8’, ‘Connection’: ‘keep-alive’} items = [] for IMO in IMOS: url = r’https://www.vesselfinder.com/en/vessels/VOS-TRAVELLER-IMO-‘ + str(IMO) req = urllib.request.Request(url, None, hdr) with urllib.request.urlopen(req) as response: the_page = response.read() parsed_html = BeautifulSoup(the_page) tables = parsed_html.findAll(“table”) for table in tables: if table.findParent(“table”) is None: for row in table.findAll(‘tr’): aux = row.findAll(‘td’) try: if aux[0].string == “Coordinates”: coords = aux[1].string if aux[0].string == “Vessel Name”: name = aux[1].string if… Read more »

Guest

cuperto

Hi Riccardo, great tutorial, thanks.

I was wondering if you could give me hint how to get using python, the json data loaded with https://www.marinetraffic.com/en/ais/home/centerx:124.6/centery:22.9/zoom:2

The json is https://www.marinetraffic.com/getData/get_data_json_4/z:2/X:1/Y:0/station:0

Which gives the data of vessels :

{“type”:1,”data”:{“rows”:[{“LAT”:”20.58006″,”LON”:”70.22562″,”SPEED”:”193″,”COURSE”:”284″,”HEADING”:”285″,”ELAPSED”:”1″,”DESTINATION”:”MUNDRA”,”FLAG”:”LR”,”LENGTH”:”336″,”ROT”:”0″,”SHIPNAME”:”MSC LISBON”,”SHIPTYPE”:”7″,”SHIP_ID”:”757781″,”WIDTH”:”45″,”L_FORE”:”261″,”W_LEFT”:”20″,”DWT”:”110697″,”GT_SHIPTYPE”:”11″},{“LAT”:”53.40211″,”LON”:”-4.131983″,”SPEED”:”1″,”COURSE”:”45″,”HEADING”:”294″,”ELAPSED”:”2″,”DESTINATION”:”GB TRA”,”FLAG”:”LR”,”LENGTH”:”243″,”ROT”:”0″,”SHIPNAME”:”ANGELICA SCHULTE”,”SHIPTYPE”:”8″,”SHIP_ID”:”757416″,”WIDTH”:”42″,”L_FORE”:”204″,”W_LEFT”:”20″,”DWT”:”106433″,”GT_SHIPTYPE”:”17″},{“LAT”:”42.04916″,”LON”:”11.50321″,”SPEED”:”64″,”COURSE”:”335″,”HEADING”:”342″,”ELAPSED”:”1″,”DESTINATION”:”ITGIT>ITCVV”,”FLAG”:”HK”,”LENGTH”:”299″,”ROT”:”28″,”SHIPNAME”:”MSC ALGECIRAS”,”SHIPTYPE”:”7″,”SHIP_ID”:”685186″,”WIDTH”:”48″,”L_FORE”:”110″,”W_LEFT”:”16″,”DWT”:”111000″,”GT_SHIPTYPE”:”11″},{“LAT”:”53.62904″,”LON”:”5.279595″,”SPEED”:”62″,”COURSE”:”252″,”HEADING”:”251″,”ELAPSED”:”1″,”DESTINATION”:”DEWVN>NLRTM”,”FLAG”:”HK”,”LENGTH”:”399″,”ROT”:”0″,”SHIPNAME”:”OOCL INDONESIA”,”SHIPTYPE”:”7″,”SHIP_ID”:”5337678″,”WIDTH”:”58″,”L_FORE”:”145″,”W_LEFT”:”23″,”DWT”:”191374″,”GT_SHIPTYPE”:”11″},{“LAT”:”36.67769″,”LON”:”22.06544″,”SPEED”:”15″,”COURSE”:”7″,”HEADING”:”86″,”ELAPSED”:”2″,”DESTINATION”:”OPL KALAMATA”,”FLAG”:”MH”,”LENGTH”:”274″,”ROT”:”0″,”SHIPNAME”:”CAPE BALDER”,”SHIPTYPE”:”8″,”SHIP_ID”:”714780″,”WIDTH”:”48″,”L_FORE”:”230″,”W_LEFT”:”24″,”DWT”:”159998″,”GT_SHIPTYPE”:”71″},{“LAT”:”42.49949″,”LON”:”27.53619″,”SPEED”:”1″,”COURSE”:”346″,”HEADING”:”208″,”ELAPSED”:”2″,”DESTINATION”:”FOR ORDERS”,”FLAG”:”MH”,”LENGTH”:”199″,”ROT”:”0″,”SHIPNAME”:”FEDERAL RUHR”,”SHIPTYPE”:”7″,”SHIP_ID”:”4757488″,”WIDTH”:”23″,”L_FORE”:”170″,”W_LEFT”:”9″,”DWT”:”36500″,”GT_SHIPTYPE”:”9″},{“LAT”:”38.21161″,”LON”:”15.26949″,”SPEED”:”0″,”COURSE”:”264″,”HEADING”:”11″,”ELAPSED”:”2″,”DESTINATION”:”MILAZZO,ITALY”,”FLAG”:”LR”,”LENGTH”:”274″,”ROT”:”0″,”SHIPNAME”:”GIANNIS”,”SHIPTYPE”:”8″,”SHIP_ID”:”754788″,”WIDTH”:”50″,”L_FORE”:”232″,”W_LEFT”:”34″,”DWT”:”149999″,”GT_SHIPTYPE”:”14″},{“LAT”:”21.56791″,”LON”:”108.3331″,”SPEED”:”45″,”COURSE”:”344″,”HEADING”:”350″,”ELAPSED”:”3″,”DESTINATION”:”CN FAN”,”FLAG”:”HK”,”LENGTH”:”254″,”ROT”:”1″,”SHIPNAME”:”MAGSENGER 19″,”SHIPTYPE”:”7″,”SHIP_ID”:”688546″,”WIDTH”:”43″,”L_FORE”:”218″,”W_LEFT”:”16″,”DWT”:”115396″,”GT_SHIPTYPE”:”6″},{“LAT”:”59.62011″,”LON”:”23.76777″,”SPEED”:”114″,”COURSE”:”69″,”HEADING”:”72″,”ELAPSED”:”1″,”DESTINATION”:”PRIMORSK”,”FLAG”:”LR”,”LENGTH”:”250″,”ROT”:”0″,”SHIPNAME”:”KALAHARI”,”SHIPTYPE”:”8″,”SHIP_ID”:”144314″,”WIDTH”:”43″,”L_FORE”:”208″,”W_LEFT”:”22″,”DWT”:”112827″,”GT_SHIPTYPE”:”71″},

Author

Riccardo

and what is your question? What sort of help is needed?

The used “Plattform”

The Process of getting Vessel Data

Putting it on a Map

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