SPARQL query: Antipode of a city

Karima Rafes

geography antipode

Antipode of a city

Displays a map of the city closest to the antipode of Perth – that is, halfway around the world from Perth.

Reuse these data in your code

Query, endpoint and code for reusing the same data

Endpoint:

https://sophox.org/sparql

Query:

PREFIX geof: <http://www.opengis.net/def/geosparql/function/> 
PREFIX osmm: <https://www.openstreetmap.org/meta/>
PREFIX osmt: <https://wiki.openstreetmap.org/wiki/Key:>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
#Antipode of a city
#defaultView:Map
SELECT ?coordinates ?cityLabel ?distanceLabel ?city WHERE {
  # Perth
  BIND('Point(115.8604796 -31.9527121)'^^geo:wktLiteral AS ?perth)
  
  # Query OpenStreetMap for cities and their coordinates
  ?city osmt:place "city";
        osmm:loc ?coordinates.
  
  # Synthesize the antipode (the point halfway around the world)
  BIND(geof:longitude(?perth) AS ?perthLongitude)
  BIND(geof:latitude(?perth) AS ?perthLatitude)
  BIND(CONCAT('Point(',
              xsd:string(-?perthLongitude / ABS(?perthLongitude) * (180 - ABS(?perthLongitude))), ' ',
              xsd:string(-?perthLatitude), ')') AS ?antipode)
  
  # Calculate the city’s distance from the antipode
  BIND(geof:distance(?antipode, ?coordinates) AS ?distance)
  BIND(CONCAT(xsd:string(ROUND(?distance)), ' km') AS ?distanceLabel)
  
  # If the city is more than a few hundred kilometers from the antipode, it isn’t really an antipode
  FILTER(?distance < 300)
  
  # Get the city’s name
  OPTIONAL { ?city osmt:name:en ?name_en. }
  OPTIONAL { ?city osmt:name ?name. }
  OPTIONAL { ?city osmt:int_name ?int_name. }
  BIND(COALESCE(?name_en, ?name, ?int_name) AS ?cityLabel)
}
ORDER BY ASC(?distance)
LIMIT 1

Howto write a query SPARQL? (in French)

{{#sparql:PREFIX geof: <http://www.opengis.net/def/geosparql/function/> 
PREFIX osmm: <https://www.openstreetmap.org/meta/>
PREFIX osmt: <https://wiki.openstreetmap.org/wiki/Key:>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
#Antipode of a city
#defaultView:Map
SELECT ?coordinates ?cityLabel ?distanceLabel ?city WHERE {
  # Perth
  BIND('Point(115.8604796 -31.9527121)'^^geo:wktLiteral AS ?perth)
  
  # Query OpenStreetMap for cities and their coordinates
  ?city osmt:place "city";
        osmm:loc ?coordinates.
  
  # Synthesize the antipode (the point halfway around the world)
  BIND(geof:longitude(?perth) AS ?perthLongitude)
  BIND(geof:latitude(?perth) AS ?perthLatitude)
  BIND(CONCAT('Point(',
              xsd:string(-?perthLongitude / ABS(?perthLongitude) * (180 - ABS(?perthLongitude))), ' ',
              xsd:string(-?perthLatitude), ')') AS ?antipode)
  
  # Calculate the city’s distance from the antipode
  BIND(geof:distance(?antipode, ?coordinates) AS ?distance)
  BIND(CONCAT(xsd:string(ROUND(?distance)), ' km') AS ?distanceLabel)
  
  # If the city is more than a few hundred kilometers from the antipode, it isn’t really an antipode
  FILTER(?distance < 300)
  
  # Get the city’s name
  OPTIONAL { ?city osmt:name:en ?name_en. }
  OPTIONAL { ?city osmt:name ?name. }
  OPTIONAL { ?city osmt:int_name ?int_name. }
  BIND(COALESCE(?name_en, ?name, ?int_name) AS ?cityLabel)
}
ORDER BY ASC(?distance)
LIMIT 1
| endpoint = https://sophox.org/sparql
| chart=leaflet.visualization.Map
| options=
| log=2
}}

Howto install LinkedWiki in my wiki? Howto insert this graph in my wiki?

Test this script in a new tab.

<html>
    <head>
        <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"  async></script>
    </head>
    <body onload="testQuery();">
        <script>
function testQuery(){
    var endpoint = "https://sophox.org/sparql";
    var query = `PREFIX geof: <http://www.opengis.net/def/geosparql/function/> 
PREFIX osmm: <https://www.openstreetmap.org/meta/>
PREFIX osmt: <https://wiki.openstreetmap.org/wiki/Key:>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
#Antipode of a city
#defaultView:Map
SELECT ?coordinates ?cityLabel ?distanceLabel ?city WHERE {
  # Perth
  BIND(\'Point(115.8604796 -31.9527121)\'^^geo:wktLiteral AS ?perth)
  
  # Query OpenStreetMap for cities and their coordinates
  ?city osmt:place \"city\";
        osmm:loc ?coordinates.
  
  # Synthesize the antipode (the point halfway around the world)
  BIND(geof:longitude(?perth) AS ?perthLongitude)
  BIND(geof:latitude(?perth) AS ?perthLatitude)
  BIND(CONCAT(\'Point(\',
              xsd:string(-?perthLongitude / ABS(?perthLongitude) * (180 - ABS(?perthLongitude))), \' \',
              xsd:string(-?perthLatitude), \')\') AS ?antipode)
  
  # Calculate the city’s distance from the antipode
  BIND(geof:distance(?antipode, ?coordinates) AS ?distance)
  BIND(CONCAT(xsd:string(ROUND(?distance)), \' km\') AS ?distanceLabel)
  
  # If the city is more than a few hundred kilometers from the antipode, it isn’t really an antipode
  FILTER(?distance < 300)
  
  # Get the city’s name
  OPTIONAL { ?city osmt:name:en ?name_en. }
  OPTIONAL { ?city osmt:name ?name. }
  OPTIONAL { ?city osmt:int_name ?int_name. }
  BIND(COALESCE(?name_en, ?name, ?int_name) AS ?cityLabel)
}
ORDER BY ASC(?distance)
LIMIT 1`;

   // $('#bodyContentResearch').append(queryDataset);
    $.ajax({
                url: endpoint,
                dataType: 'json',
                data: {
                    queryLn: 'SPARQL',
                    query: query ,
                    limit: 'none',
                    infer: 'true',
                    Accept: 'application/sparql-results+json'
                },
                success: displayResult,
                error: displayError
        });
}

function displayError(xhr, textStatus, errorThrown) {
    console.log(textStatus);
    console.log(errorThrown);
}

function displayResult(data) {
    $.each(data.results.bindings, function(index, bs) {
        console.log(bs);
        $("body").append(JSON.stringify(bs) + "<hr/>");
    });
}

        </script>
    </body>
</html>

Test this script in a new tab.

<html>
    <head>
        <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"  async></script>
    </head>
    <body onload="testQuery();">
        <script>
function testQuery(){
    var url = new URL("https://sophox.org/sparql");
    var params = {query:`PREFIX geof: <http://www.opengis.net/def/geosparql/function/> 
PREFIX osmm: <https://www.openstreetmap.org/meta/>
PREFIX osmt: <https://wiki.openstreetmap.org/wiki/Key:>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
#Antipode of a city
#defaultView:Map
SELECT ?coordinates ?cityLabel ?distanceLabel ?city WHERE {
  # Perth
  BIND(\'Point(115.8604796 -31.9527121)\'^^geo:wktLiteral AS ?perth)
  
  # Query OpenStreetMap for cities and their coordinates
  ?city osmt:place \"city\";
        osmm:loc ?coordinates.
  
  # Synthesize the antipode (the point halfway around the world)
  BIND(geof:longitude(?perth) AS ?perthLongitude)
  BIND(geof:latitude(?perth) AS ?perthLatitude)
  BIND(CONCAT(\'Point(\',
              xsd:string(-?perthLongitude / ABS(?perthLongitude) * (180 - ABS(?perthLongitude))), \' \',
              xsd:string(-?perthLatitude), \')\') AS ?antipode)
  
  # Calculate the city’s distance from the antipode
  BIND(geof:distance(?antipode, ?coordinates) AS ?distance)
  BIND(CONCAT(xsd:string(ROUND(?distance)), \' km\') AS ?distanceLabel)
  
  # If the city is more than a few hundred kilometers from the antipode, it isn’t really an antipode
  FILTER(?distance < 300)
  
  # Get the city’s name
  OPTIONAL { ?city osmt:name:en ?name_en. }
  OPTIONAL { ?city osmt:name ?name. }
  OPTIONAL { ?city osmt:int_name ?int_name. }
  BIND(COALESCE(?name_en, ?name, ?int_name) AS ?cityLabel)
}
ORDER BY ASC(?distance)
LIMIT 1`};

    url.search = new URLSearchParams(params).toString();

    var myHeaders = new Headers();
    myHeaders.append("Accept", "application/sparql-results+json");

    var requestOptions = {
      method: 'GET',
      headers: myHeaders,
      redirect: 'follow'
    };

    fetch(url, requestOptions)
        .then(response => response.json())
        .then(result => displayResult(result))
        .catch(error => displayError(error));
}

function displayError(error) {
    console.log(error);
}

function displayResult(data) {
    data.results.bindings.forEach(bs => {
            console.log(bs);
            $("body").append(JSON.stringify(bs) + "<hr/>");
    });
}
        </script>
    </body>
</html>

Test this script in a new tab (Careful, several charts need a API key).
Howto insert this graph in my html page?

<html>
    <head>
     <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">

     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.9.0/css/all.min.css">

     <script
            src="https://code.jquery.com/jquery-3.4.1.min.js"
            integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="
            crossorigin="anonymous"> </script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"> </script>
     <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"> </script>

     <script type="text/javascript" src="https://bordercloud.github.io/sgvizler2/sgvizler2/sgvizler2.js" defer> </script>
     <script type="text/javascript" src="https://linkedwiki.com/js/initExampleHTML.js"  defer > </script>
    </head>
<body style="margin:0;">
<div id="sgvzl_example_query"
   data-sgvizler-endpoint="https://sophox.org/sparql"
   data-sgvizler-query="PREFIX geof: &lt;http://www.opengis.net/def/geosparql/function/&gt; 
PREFIX osmm: &lt;https://www.openstreetmap.org/meta/&gt;
PREFIX osmt: &lt;https://wiki.openstreetmap.org/wiki/Key:&gt;
PREFIX xsd: &lt;http://www.w3.org/2001/XMLSchema#&gt; 
#Antipode of a city
#defaultView:Map
SELECT ?coordinates ?cityLabel ?distanceLabel ?city WHERE {
  # Perth
  BIND(&#039;Point(115.8604796 -31.9527121)&#039;^^geo:wktLiteral AS ?perth)
  
  # Query OpenStreetMap for cities and their coordinates
  ?city osmt:place &quot;city&quot;;
        osmm:loc ?coordinates.
  
  # Synthesize the antipode (the point halfway around the world)
  BIND(geof:longitude(?perth) AS ?perthLongitude)
  BIND(geof:latitude(?perth) AS ?perthLatitude)
  BIND(CONCAT(&#039;Point(&#039;,
              xsd:string(-?perthLongitude / ABS(?perthLongitude) * (180 - ABS(?perthLongitude))), &#039; &#039;,
              xsd:string(-?perthLatitude), &#039;)&#039;) AS ?antipode)
  
  # Calculate the city&rsquo;s distance from the antipode
  BIND(geof:distance(?antipode, ?coordinates) AS ?distance)
  BIND(CONCAT(xsd:string(ROUND(?distance)), &#039; km&#039;) AS ?distanceLabel)
  
  # If the city is more than a few hundred kilometers from the antipode, it isn&rsquo;t really an antipode
  FILTER(?distance &lt; 300)
  
  # Get the city&rsquo;s name
  OPTIONAL { ?city osmt:name:en ?name_en. }
  OPTIONAL { ?city osmt:name ?name. }
  OPTIONAL { ?city osmt:int_name ?int_name. }
  BIND(COALESCE(?name_en, ?name, ?int_name) AS ?cityLabel)
}
ORDER BY ASC(?distance)
LIMIT 1"
    data-sgvizler-chart='leaflet.visualization.Map'
    data-sgvizler-chart-options=''
    data-sgvizler-endpoint_output_format='json'
    data-sgvizler-log='2'
    style='width:100%; height:500px;'
    lang='en'
   />

<script>
/*$(function() {
   sgvizler2.containerDrawAll({
       // Google Api key
       googleApiKey : "GOOGLE_MAP_API_KEY",
       // OpenStreetMap Access Token
       //  https://www.mapbox.com/api-documentation/#access-tokens
       osmAccessToken : "OSM_MAP_API_KEY"
     });
});*/
</script>

</body>
</html>

from SPARQLWrapper import SPARQLWrapper, JSON

sparql = SPARQLWrapper("https://sophox.org/sparql")
sparql.setQuery("""
    PREFIX geof: <http://www.opengis.net/def/geosparql/function/> 
PREFIX osmm: <https://www.openstreetmap.org/meta/>
PREFIX osmt: <https://wiki.openstreetmap.org/wiki/Key:>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
#Antipode of a city
#defaultView:Map
SELECT ?coordinates ?cityLabel ?distanceLabel ?city WHERE {
  # Perth
  BIND('Point(115.8604796 -31.9527121)'^^geo:wktLiteral AS ?perth)
  
  # Query OpenStreetMap for cities and their coordinates
  ?city osmt:place "city";
        osmm:loc ?coordinates.
  
  # Synthesize the antipode (the point halfway around the world)
  BIND(geof:longitude(?perth) AS ?perthLongitude)
  BIND(geof:latitude(?perth) AS ?perthLatitude)
  BIND(CONCAT('Point(',
              xsd:string(-?perthLongitude / ABS(?perthLongitude) * (180 - ABS(?perthLongitude))), ' ',
              xsd:string(-?perthLatitude), ')') AS ?antipode)
  
  # Calculate the city’s distance from the antipode
  BIND(geof:distance(?antipode, ?coordinates) AS ?distance)
  BIND(CONCAT(xsd:string(ROUND(?distance)), ' km') AS ?distanceLabel)
  
  # If the city is more than a few hundred kilometers from the antipode, it isn’t really an antipode
  FILTER(?distance < 300)
  
  # Get the city’s name
  OPTIONAL { ?city osmt:name:en ?name_en. }
  OPTIONAL { ?city osmt:name ?name. }
  OPTIONAL { ?city osmt:int_name ?int_name. }
  BIND(COALESCE(?name_en, ?name, ?int_name) AS ?cityLabel)
}
ORDER BY ASC(?distance)
LIMIT 1""")
sparql.setReturnFormat(JSON)
results = sparql.query().convert()

for result in results["results"]["bindings"]:
    print(result)
    #print(result["label"]["value"])

Howto use SPARQL with Python ?

library(SPARQL) # SPARQL querying package
library(ggplot2)

# Step 1 - Set up preliminaries and define query
# Define the data.gov endpoint
    endpoint <- "https://sophox.org/sparql"
# create query statement
    query <- "PREFIX geof: <http://www.opengis.net/def/geosparql/function/> 
PREFIX osmm: <https://www.openstreetmap.org/meta/>
PREFIX osmt: <https://wiki.openstreetmap.org/wiki/Key:>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
#Antipode of a city
#defaultView:Map
SELECT ?coordinates ?cityLabel ?distanceLabel ?city WHERE {
  # Perth
  BIND('Point(115.8604796 -31.9527121)'^^geo:wktLiteral AS ?perth)
  
  # Query OpenStreetMap for cities and their coordinates
  ?city osmt:place "city";
        osmm:loc ?coordinates.
  
  # Synthesize the antipode (the point halfway around the world)
  BIND(geof:longitude(?perth) AS ?perthLongitude)
  BIND(geof:latitude(?perth) AS ?perthLatitude)
  BIND(CONCAT('Point(',
              xsd:string(-?perthLongitude / ABS(?perthLongitude) * (180 - ABS(?perthLongitude))), ' ',
              xsd:string(-?perthLatitude), ')') AS ?antipode)
  
  # Calculate the city’s distance from the antipode
  BIND(geof:distance(?antipode, ?coordinates) AS ?distance)
  BIND(CONCAT(xsd:string(ROUND(?distance)), ' km') AS ?distanceLabel)
  
  # If the city is more than a few hundred kilometers from the antipode, it isn’t really an antipode
  FILTER(?distance < 300)
  
  # Get the city’s name
  OPTIONAL { ?city osmt:name:en ?name_en. }
  OPTIONAL { ?city osmt:name ?name. }
  OPTIONAL { ?city osmt:int_name ?int_name. }
  BIND(COALESCE(?name_en, ?name, ?int_name) AS ?cityLabel)
}
ORDER BY ASC(?distance)
LIMIT 1"
# Step 2 - Use SPARQL package to submit query and save results to a data frame
qd <- SPARQL(endpoint,query,curl_args=list(useragent=R.version.string))
df <- qd$results

SPARQL with R in less than 5 minutes

#!/usr/bin/env ruby
#
# Install sparql for Ruby
#   gem update --system
#   gem install sparql
#
require 'sparql/client'

endpoint = "https://sophox.org/sparql"
sparql = <<-EOT
PREFIX geof: <http://www.opengis.net/def/geosparql/function/> 
PREFIX osmm: <https://www.openstreetmap.org/meta/>
PREFIX osmt: <https://wiki.openstreetmap.org/wiki/Key:>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
#Antipode of a city
#defaultView:Map
SELECT ?coordinates ?cityLabel ?distanceLabel ?city WHERE {
  # Perth
  BIND('Point(115.8604796 -31.9527121)'^^geo:wktLiteral AS ?perth)
  
  # Query OpenStreetMap for cities and their coordinates
  ?city osmt:place "city";
        osmm:loc ?coordinates.
  
  # Synthesize the antipode (the point halfway around the world)
  BIND(geof:longitude(?perth) AS ?perthLongitude)
  BIND(geof:latitude(?perth) AS ?perthLatitude)
  BIND(CONCAT('Point(',
              xsd:string(-?perthLongitude / ABS(?perthLongitude) * (180 - ABS(?perthLongitude))), ' ',
              xsd:string(-?perthLatitude), ')') AS ?antipode)
  
  # Calculate the city’s distance from the antipode
  BIND(geof:distance(?antipode, ?coordinates) AS ?distance)
  BIND(CONCAT(xsd:string(ROUND(?distance)), ' km') AS ?distanceLabel)
  
  # If the city is more than a few hundred kilometers from the antipode, it isn’t really an antipode
  FILTER(?distance < 300)
  
  # Get the city’s name
  OPTIONAL { ?city osmt:name:en ?name_en. }
  OPTIONAL { ?city osmt:name ?name. }
  OPTIONAL { ?city osmt:int_name ?int_name. }
  BIND(COALESCE(?name_en, ?name, ?int_name) AS ?cityLabel)
}
ORDER BY ASC(?distance)
LIMIT 1
EOT

#For Wikidata, the method get is required
#For other SPARQL endpoints, the method post is prefered
client = SPARQL::Client.new(endpoint, :method => :get)
rows = client.query(sparql)

puts "Number of rows: #{rows.size}"
for row in rows
  for key,val in row do
    # print "#{key.to_s.ljust(10)}: #{val}\t"
    print "#{key}: #{val}\t"
  end
  print "\n"
end

Doc Ruby for SPARQL 1.1

endpoint = 'https://sophox.org/sparql';

query = ['PREFIX geof: <http://www.opengis.net/def/geosparql/function/>  '...
'PREFIX osmm: <https://www.openstreetmap.org/meta/> '...
'PREFIX osmt: <https://wiki.openstreetmap.org/wiki/Key:> '...
'PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>  '...
'#Antipode of a city '...
'#defaultView:Map '...
'SELECT ?coordinates ?cityLabel ?distanceLabel ?city WHERE { '...
'  # Perth '...
'  BIND('Point(115.8604796 -31.9527121)'^^geo:wktLiteral AS ?perth) '...
'   '...
'  # Query OpenStreetMap for cities and their coordinates '...
'  ?city osmt:place "city"; '...
'        osmm:loc ?coordinates. '...
'   '...
'  # Synthesize the antipode (the point halfway around the world) '...
'  BIND(geof:longitude(?perth) AS ?perthLongitude) '...
'  BIND(geof:latitude(?perth) AS ?perthLatitude) '...
'  BIND(CONCAT('Point(', '...
'              xsd:string(-?perthLongitude / ABS(?perthLongitude) * (180 - ABS(?perthLongitude))), ' ', '...
'              xsd:string(-?perthLatitude), ')') AS ?antipode) '...
'   '...
'  # Calculate the city’s distance from the antipode '...
'  BIND(geof:distance(?antipode, ?coordinates) AS ?distance) '...
'  BIND(CONCAT(xsd:string(ROUND(?distance)), ' km') AS ?distanceLabel) '...
'   '...
'  # If the city is more than a few hundred kilometers from the antipode, it isn’t really an antipode '...
'  FILTER(?distance < 300) '...
'   '...
'  # Get the city’s name '...
'  OPTIONAL { ?city osmt:name:en ?name_en. } '...
'  OPTIONAL { ?city osmt:name ?name. } '...
'  OPTIONAL { ?city osmt:int_name ?int_name. } '...
'  BIND(COALESCE(?name_en, ?name, ?int_name) AS ?cityLabel) '...
'} '...
'ORDER BY ASC(?distance) '...
'LIMIT 1 '];

url_head = strcat(endpoint,'?query=');
url_query = urlencode(query);
format = 'text/tab-separated-values';
url_tail = strcat('&format=', format);

url = strcat(url_head, url_query, url_tail);

% get the data from the endpoint
query_results = urlread(url);

% write the data to a file so that tdfread can parse it
fid = fopen('query_results.txt','w');
if fid>=0
    fprintf(fid, '%s\n', query_results)
    fclose(fid)
end

% this reads the tsv file into a struct
sparql_data = tdfread('query_results.txt')

Project Github MatlabSPARQL

<?php
require __DIR__ . '/../vendor/autoload.php';
use BorderCloud\SPARQL\SparqlClient;

$endpoint ="https://sophox.org/sparql";
$sp_readonly = new SparqlClient();
$sp_readonly->setEndpointRead($endpoint);
$q = <<<EOD
PREFIX geof: <http://www.opengis.net/def/geosparql/function/> 
PREFIX osmm: <https://www.openstreetmap.org/meta/>
PREFIX osmt: <https://wiki.openstreetmap.org/wiki/Key:>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
#Antipode of a city
#defaultView:Map
SELECT ?coordinates ?cityLabel ?distanceLabel ?city WHERE {
  # Perth
  BIND('Point(115.8604796 -31.9527121)'^^geo:wktLiteral AS ?perth)
  
  # Query OpenStreetMap for cities and their coordinates
  ?city osmt:place "city";
        osmm:loc ?coordinates.
  
  # Synthesize the antipode (the point halfway around the world)
  BIND(geof:longitude(?perth) AS ?perthLongitude)
  BIND(geof:latitude(?perth) AS ?perthLatitude)
  BIND(CONCAT('Point(',
              xsd:string(-?perthLongitude / ABS(?perthLongitude) * (180 - ABS(?perthLongitude))), ' ',
              xsd:string(-?perthLatitude), ')') AS ?antipode)
  
  # Calculate the city’s distance from the antipode
  BIND(geof:distance(?antipode, ?coordinates) AS ?distance)
  BIND(CONCAT(xsd:string(ROUND(?distance)), ' km') AS ?distanceLabel)
  
  # If the city is more than a few hundred kilometers from the antipode, it isn’t really an antipode
  FILTER(?distance < 300)
  
  # Get the city’s name
  OPTIONAL { ?city osmt:name:en ?name_en. }
  OPTIONAL { ?city osmt:name ?name. }
  OPTIONAL { ?city osmt:int_name ?int_name. }
  BIND(COALESCE(?name_en, ?name, ?int_name) AS ?cityLabel)
}
ORDER BY ASC(?distance)
LIMIT 1
EOD;
$rows = $sp_readonly->query($q, 'rows');
$err = $sp_readonly->getErrors();
if ($err) {
      print_r($err);
      throw new Exception(print_r($err, true));
}

foreach ($rows["result"]["variables"] as $variable) {
        printf("%-20.20s",$variable);
        echo '|';
 }
 echo "\n";

foreach ($rows["result"]["rows"] as $row) {
        foreach ($rows["result"]["variables"] as $variable) {
            printf("%-20.20s", $row[$variable]);
            echo '|';
        }
        echo "\n";
 }
 ?>

Project Github BorderCloud/SPARQL

import com.bordercloud.sparql.*;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.HashMap;

public class Main {

    public static void main(String[] args) {
        try {
            URI endpoint = new URI("https://sophox.org/sparql");
            String querySelect  = "PREFIX geof: <http://www.opengis.net/def/geosparql/function/>  \n"
                    + "PREFIX osmm: <https://www.openstreetmap.org/meta/> \n"
                    + "PREFIX osmt: <https://wiki.openstreetmap.org/wiki/Key:> \n"
                    + "PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>  \n"
                    + "#Antipode of a city \n"
                    + "#defaultView:Map \n"
                    + "SELECT ?coordinates ?cityLabel ?distanceLabel ?city WHERE { \n"
                    + "  # Perth \n"
                    + "  BIND(\'Point(115.8604796 -31.9527121)\'^^geo:wktLiteral AS ?perth) \n"
                    + "   \n"
                    + "  # Query OpenStreetMap for cities and their coordinates \n"
                    + "  ?city osmt:place \"city\"; \n"
                    + "        osmm:loc ?coordinates. \n"
                    + "   \n"
                    + "  # Synthesize the antipode (the point halfway around the world) \n"
                    + "  BIND(geof:longitude(?perth) AS ?perthLongitude) \n"
                    + "  BIND(geof:latitude(?perth) AS ?perthLatitude) \n"
                    + "  BIND(CONCAT(\'Point(\', \n"
                    + "              xsd:string(-?perthLongitude / ABS(?perthLongitude) * (180 - ABS(?perthLongitude))), \' \', \n"
                    + "              xsd:string(-?perthLatitude), \')\') AS ?antipode) \n"
                    + "   \n"
                    + "  # Calculate the city’s distance from the antipode \n"
                    + "  BIND(geof:distance(?antipode, ?coordinates) AS ?distance) \n"
                    + "  BIND(CONCAT(xsd:string(ROUND(?distance)), \' km\') AS ?distanceLabel) \n"
                    + "   \n"
                    + "  # If the city is more than a few hundred kilometers from the antipode, it isn’t really an antipode \n"
                    + "  FILTER(?distance < 300) \n"
                    + "   \n"
                    + "  # Get the city’s name \n"
                    + "  OPTIONAL { ?city osmt:name:en ?name_en. } \n"
                    + "  OPTIONAL { ?city osmt:name ?name. } \n"
                    + "  OPTIONAL { ?city osmt:int_name ?int_name. } \n"
                    + "  BIND(COALESCE(?name_en, ?name, ?int_name) AS ?cityLabel) \n"
                    + "} \n"
                    + "ORDER BY ASC(?distance) \n"
                    + "LIMIT 1 \n";
            SparqlClient sc = new SparqlClient(false);
            sc.setEndpointRead(endpoint);
            SparqlResult sr = sc.query(querySelect);
            //sc.printLastQueryAndResult();

            printResult(sr.getModel(),30);
        } catch (URISyntaxException | SparqlClientException e) {
            System.out.println(e);
            e.printStackTrace();
        }
    }

    public static void printResult(SparqlResultModel rs , int size) {
        for (String variable : rs.getVariables()) {
            System.out.print(String.format("%-"+size+"."+size+"s", variable ) + " | ");
        }
        System.out.print("\n");
        for (HashMap row : rs.getRows()) {
            for (String variable : rs.getVariables()) {
                System.out.print(String.format("%-"+size+"."+size+"s", row.get(variable)) + " | ");
            }
            System.out.print("\n");
        }
    }
}

For example, with Gradle :

apply plugin: 'java'
apply plugin: 'application'

// This comes out to package + '.' + mainClassName
mainClassName = 'Main'

group 'org.example'
version '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}
dependencies {
    compile "com.bordercloud:SPARQL-JAVA:[1.0,)"
}

Project Github BorderCloud/SPARQL-JAVA
Other SPARQL client : RDF4J

You can use the SPARQL clients in Java : BorderCloud/SPARQL-JAVA or RDF4J

Table view

Simple view on the data

Reuse these data in your code

Query, endpoint and code for reusing the same data