I'm developing an Java application which, given a list of street names, must get a route and information about each street name, as the city or cities where each street is located. This is a preprocessing, made in a desktop, for an Android application.
For that I must to process data from some map source like OSM. I need to easily access data from streets and some other points programmatically to select my desired data.
I need to do it with Java. Is there some Java library for this?
The OSM wiki has a large list of routing software and libraries. Some of them use Java, for example GraphHopper. Also don't forget to take a look at the various online and offline routers to get some inspiration.
Related
How complex a project would this be?
There is the issue of integrating the dataset specific API.
I.e. dataset column names, dataset metadata perhaps
There is the issue of integration higher level APIs.
I.e names of datasets available, information about the specific portal, ...
Am I missing the point here with my question? Or would this a major coding project?
RLH
There are a couple of options you might take a look at:
You can actually create maps from Socrata data right from within our data exploration tools. Here's a support article on how you can do so
Using the GeoJSON output from our API, you can pull data into tools like CartoDB without needing to download it first
You could create a map mashup using a library like Leaflet or the Google Maps API. Here's an example of how to do it with the Google Maps API
I am creating a webpage that includes maps for my software engineering thesis. The page will include following features:
Show a specific location and save it to a database;
Showing different roads in the same map and save then to database;
Getting the nearest road that passes nearby a specific location pointed by a user - a little search function;
Users might be allowed to create different roads, which can be saved in a database.
The thing is that the service (API) used should be free. For this reason, we might not be using Google Maps.
We are using Java for the Model Classes.
Which maps API can I use?
How can I ask it which of the roads is nearest to a certain point (location) on the map?
Google Maps API is Free as long as you are not using more than a certain amount of traffic. If its for a class project it should be fine, but if that project turned into a commercial site, it would become expensive.
The app I'm building needs to be able to match up users to events based on the city/town they're in. I'm still relatively new to Rails and completely new to Geolocation and using locations in an app. I'd figured on a design where users have one or many cities, and events would have one city which I'd hoped to extract without specifically asking the user for it, by getting it from the event address entered.
Mostly to provide some outside checking to help get the address entered correctly and consistently, but also to show a map, I installed this jquery address picker (https://github.com/sgruhier/jquery-addresspicker). Unfortunately the data returned by Google doesn't include a city but a "locality" or an "administrative area" that doesn't correlate reliably to city names. The localities being returned are more like what we in my home town would call "suburbs". What I need to procure is a city so I can allow users to search all events in their city rather than just the ones in their suburb.
Can anyone offer advice on how I could go about doing this? Many thanks.
Edit: Should maybe add that I'm wanting to do geocoding client-side so I don't run into problems with Google Maps limits or have to pay for geocoding etc.
There are some gems that provide you with that and may others geo related features, like calculating distances.
Here are the 2 most famous: https://github.com/alexreisner/geocoder and https://github.com/imajes/geokit
In the future I highly recommend you to head to https://www.ruby-toolbox.com/ to see what is available as a gem already and see what is the most popular at the moment.
For raw address info, use Google Maps API Reverse Geocoding which accepts lat/lon inputs and returns street address components. Modern browsers support location awareness (geolocation), with user permission, and will give you a lat/lon that "tends to be close" to where the browser is. That will probably get you a correct city/town in most cases.
The maps API is part of Google's broad suite of API tools -- there are gems that handle any Google API (well, most of them), or check out Google Maps for Rails, which will at the very least give you a good head start on how to use the API.
But if you're looking to validate postal code, this method will come up short, since the location awareness will vary in accuracy depending on browser, device (more accurate for mobile), the connection, population density, network coverage, and so on. Also, calling the
If you can get GPS-accurate lat/lon then it will be much more accurate ... except in some cases like in large cities, a single building will have its own postal code, so a few feet one way or the other might matter.
I've tried Google but I'm not smart enough to build my own Google Store locator. Everything is either old or in PHP and I use Python. Even GAE uses Python but I can't find any tutorials for Python at all. I even had a bounty here on S.o. for resources to a Python store locator and the only answer had a post from 2008 that was updated to "deprecated" on the post itself.
So I decided to give Bing a try and it has more noob options, such as "enter address here" and then it's listed in the app. The only problem is that everything is pointing me to Bing Spacial Datasend and it says they want to charge an arm and a leg.
Also, if you know of any, are there any good tutorials on building a Bing Store Locator? Google search has come up empty for me but they could always be hiding them. Thanks.
If you have less than 50 locations you can use the Bing Spatial Data Services under the free terms of use. If your application is a public facing web site, which most store locators are you can also generate 125,000 transactions against Bing Maps for free per year. If this is enough or not would depend on the number of stores and customers you have. The Bing Spatial Data Services is a really good option as you simply upload your data and it exposes it as a spatial rest service for you which you can access directly from JavaScript without the need for any server side code. Here is an example of how to query a data source in the Bing Spatial Data Services: http://www.bingmapsportal.com/ISDK/AjaxV7#SpatialDataServices1
If your application has a lot more volume then you would need a Bing Maps license. The cost of a license varies depending on the amount of transactions your application will use. If you have a Bing Maps license data sources can have up to 600,000 locations in a single data source and each Bing Maps account is allowed up to 25 data sources.
How do I go about displaying content based on a users location ? For ex. If somebody accesses the site from the New York , I would like to display New York Hotels . However if somebody accesses the site from Chicago , I would like to display Chicago hotels.
You're looking for a Geoloction database which would give you access to the typical IP ranges for the countries/cities you need to flag.
This is not absolute or completely trustworthy information though. Country level geo-location is mostly effective but anything like city/state/zip code level information should be treated with great caution.
I've worked with major multinational media providers using expensive paid services and discovered that the information in these databases is a very long way from correct and that users individual circumstances often prevent geo-location from being effective.
e.g. Virgin and East Coast trains in the UK use T-Mobile Germany as their onboard internet provider so you appear to be in Germany to many sites and payment processors.
There are quite a few free geolocation databases, MaxMind springs to mind (though this is not a recommendation of their service).
You can find some thoughts on implementing geo-location here
You need some database/api with information about hotells in different locations, then you need to now where the visitor is.
You can use something like Travel/Hotel API's? to find hotells.
And for finding the location of your visitor you can use something like http://www.hostip.info/use.html
or you can use HTML5 geolocation api example http://html5demos.com/geo . The bad thing with the html5 geo api is that the user need to accept before you get their location.
Remember that there is no guaranty that the location is correct...
This is the exact reason I created wpgeocode. WPGeocode is a free plugin for wordpress that enables publishers to customize content based on reader location. Check out the plugin at the support site at http://www.wpgeocode.com
The plugin enables shortcodes that can be placed in your posts or pages. There are many conditional shortcodes such as [wpgc_is_country_code country_code="US"] for this exact purpose. Simple open the shortcode, specify the target country_code and provide the content to be displayed if the reader is visiting from that specific country.
Visit http://www.wpgeocode.com/shortcodes for a complete listing - here are a few:
[wpgc_is_city_and_state city=”Yardley” state_code=”PA”]
[wpgc_is_ip” ip=”xx.xx.xx.xx”]
[wpgc_is_ips” ip=”xx.xx.xx.xx,aa.bb.cc.dd”]
[wpgc_is_not_ip” ip=”xx.xx.xx.xx”]
[wpgc_is_not_ips” ip=”xx.xx.xx.xx,aa.bb.cc.dd”]
[wpgc_is_city” city=””]
[wpgc_is_cities” cities=”city one,city two,city three”]
[wpgc_is_not_city” city=””]
[wpgc_is_not_cities” cities=”city
one,city two,city three”]
[wpgc_is_nearby”] – Uses the value you
specify in the Nearby Range setting from the administrative panel
[wpgc_is_not_nearby”]
[wpgc_is_within” miles=”10″]
[wpgc_is_within
kilometers=”12″]
[wpgc_is_country_name” country_name=””]
[wpgc_is_country_names” country_name=”United States,Egypt,Albania”]
[wpgc_is_country_code” country_code=””]
[wpgc_is_country_codes”
country_codes=”US,GB,AZ”]
[wpgc_is_state_code” state_code=””]
[wpgc_is_state_codes” state_codes=”PA,NJ,TX”]
[wpgc_is_not_country_name” country_name=””]
[wpgc_is_not_country_names” country_names=”United
States,Egypt,Albania”]
[wpgc_is_not_country_code” country_code=””]
[wpgc_is_not_country_codes” country_codes=”US,GB,AZ”]
[wpgc_is_not_state_code” state_code=””]
[wpgc_is_not_state_codes”
state_codes=”PA,NJ,TX”]
dotCMS offers the ability to geolocate content OTB (disclaimer, I work for them). You can see a demonstration that displays news content based on the user's location onthe demo site:
It is pretty easy to setup and use. Any type of content can be geolocated and the content can be accessed through the RESTful API. Under the covers, the Geolocation queries are handled natively via Elasticsearch.
Example:
http://demo.dotcms.com/demos/content-geolocation
Docs:
http://dotcms.com/docs/latest/es-geolocation-queries