Detect the nearest transit stop from the given location

I need to get all the nearby public transit information within certain distance from a given location. The type of public transit can be either bus, train, etc..

Here is what I meant:

If I use Google Map to query "Transit Stop near a Location (e.g. Bugis Street Singapore)", then it will return us all the nearby Transit Stop that I want. Like the one shown in the picture. But I need its API to get those details out. (such as bus service No, bus stop ID, etc. as shown in the picture). But I couldn't found any.

Here is what I've tried

  1. I have tried using the Google Map Nearby Place API to search for a place with the type of transit_station, bus_station, train_station,etc... But they all return Zero Result. I could only use this API to search for Nearby Place of Interest, but not nearby transit.

  2. I've also check Google Transit API, but I only found API to insert transit data to Google but Not to extract it out. I think Google didn't publicize the transit API yet.


Additional Information

I have check the site Gothere.sg. And confused How? because they able to detect the nearby transit. Is it only because they specify the direction "From-To".

I have read a pretty similar question on Detecting nearby transit. Perhaps It is not yet possible if we use Google APIs.

But nothing is impossible for me

Last Resort

As Last resort, I also check with the provider, publictransport.sg. I hack around with the API. And found out that it can provide me with a transit stop with some coordinate. But it lack a nearby API which found on Google Map.

So one workaround I could think of at the moment, is to use the provider in this case was publictransport.sg which give me the Stop ID and its coordinate. To do this, First, I have to translate the location name using the Google GeoCoding API into Coordinate then I have to create my own nearby calculation to find the nearby station by comparing the searched Coordinate against all the station coordinate that the provider have.

Now, it is possible for me, but very painful :-)


Back to the Question:

Is there a way to retrieve all transit stop data from a given location (either using Google Maps API or Any other API)? and How did u do that?


Thanks

At least thanks for reading my lengthy question. I appreciate any help from you. Thanks in advance :-)

Answers


Well, you could use the places-API to find the nearest transit-stops, it works fine for me for the given location.

Just do a request with the parameters:

  • location (latlng-object of the given location)
  • radius(radius to search for in meters)
  • types(array of valid types, e.g. ['bus_station','subway_station'])

Checkout the fiddle: http://jsfiddle.net/doktormolle/aZrvs/

For retrieving further details(bus service No, bus stop ID) I don't have any good idea right now.

There should be a way, those data on maps.google.com will be retrieved by using AJAX, so there is a ressource. But as long as there is no public API to fetch those results it would not be legal to use this ressource.


You can still enumerate all of Bus Service Number, Bus Stop ID (Station Names) after getting the google-places-api details, as @Dr.Molle: said.

Open the webpage of detail['result']['url'], and then XPath the string of bus ID list.

Below is an example to get Taipei's bus Info around a location (latitude, longitude). More detail implementation see https://github.com/MikimotoH/gisTools/blob/master/google_place.py

places = get_web_json(
    'https://maps.googleapis.com/maps/api/place/nearbysearch/json?' +
    'key=%s&location=%f,%f' % (apikey, lat, lng) +
    '&rankby=distance&language=zh-TW&types=bus_station')
if places['status'] == 'OK':
    for result in places['results']:
        placeid = result['place_id']
        detail = get_web_json(
            'https://maps.googleapis.com/maps/api/place/details/' +
            'json?key=%s&placeid=%s' % (apikey, placeid) +
            '&language=zh-TW')
        station = detail['result']['name']
        loc = detail['result']['geometry']['location']
        buspage = get_webpage(detail['result']['url'])
        tree = lxml.html.document_fromstring(buspage)
        bus_elm = tree.xpath("/html/body/div[1]/div/div[4]/div[4]/div/div/div[2]/div/div[2]/div[1]/div[2]/div/div/div[2]/div/table/tr/td")[0]
        buses = list(filter(lambda s: len(s.strip()) > 0,
                            bus_elm.text_content().strip().split()))
        yield (station, float(loc['lat']), float(loc['lat']), buses)

Adding &output=json to your initial query (http://maps.google.com/maps?q=transit%20stop%20near%20New%20Bugis%20Street%20Singapore&output=json), is not a legal way to get this information?


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