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[COPY] Impact crater in Nasa's dataset
Impact crater in Nasa's dataset

Reuse these data in your code

Query, endpoint and code for reusing the same data
http://nasa.sparql.pro/sparql
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
PREFIX socrata: <http://www.socrata.com/rdf/terms#>

PREFIX ds: <http://data.nasa.gov/resource/gh4g-9sfh/>
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>

select distinct 
xsd:float(?lat) xsd:float(?long) ?name 
(CONCAT(?rowId," ",?mass," ",?nametype," ",?recclass," ",?year) as ?description)
?site
where {

GRAPH <https://data.nasa.gov/Space-Science/Meteorite-Landings/gh4g-9sfh> {
 ?site socrata:rowID ?rowId ;
    ds:geolocation ?geoloc ;
    ds:id ?id ;
    ds:mass ?mass ;
    ds:name ?name ;
    ds:nametype ?nametype ;
    ds:recclass ?recclass ;
    ds:year ?year .
?geoloc geo:lat ?lat ;
    geo:long ?long .
} 
}LIMIT 20
Howto write a query SPARQL? (in French)
{{#sparql:PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
PREFIX socrata: <http://www.socrata.com/rdf/terms#>

PREFIX ds: <http://data.nasa.gov/resource/gh4g-9sfh/>
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>

select distinct 
xsd:float(?lat) xsd:float(?long) ?name 
(CONCAT(?rowId," ",?mass," ",?nametype," ",?recclass," ",?year) as ?description)
?site
where {

GRAPH <https://data.nasa.gov/Space-Science/Meteorite-Landings/gh4g-9sfh> {
 ?site socrata:rowID ?rowId ;
    ds:geolocation ?geoloc ;
    ds:id ?id ;
    ds:mass ?mass ;
    ds:name ?name ;
    ds:nametype ?nametype ;
    ds:recclass ?recclass ;
    ds:year ?year .
?geoloc geo:lat ?lat ;
    geo:long ?long .
} 
}LIMIT 20
| endpoint = http://nasa.sparql.pro/sparql
| chart=sgvizler.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 = "http://nasa.sparql.pro/sparql";
    var query = "PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> \n\
PREFIX socrata: <http://www.socrata.com/rdf/terms#>\n\
\n\
PREFIX ds: <http://data.nasa.gov/resource/gh4g-9sfh/>\n\
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>\n\
\n\
select distinct \n\
xsd:float(?lat) xsd:float(?long) ?name \n\
(CONCAT(?rowId,\" \",?mass,\" \",?nametype,\" \",?recclass,\" \",?year) as ?description)\n\
?site\n\
where {\n\
\n\
GRAPH <https://data.nasa.gov/Space-Science/Meteorite-Landings/gh4g-9sfh> {\n\
 ?site socrata:rowID ?rowId ;\n\
    ds:geolocation ?geoloc ;\n\
    ds:id ?id ;\n\
    ds:mass ?mass ;\n\
    ds:name ?name ;\n\
    ds:nametype ?nametype ;\n\
    ds:recclass ?recclass ;\n\
    ds:year ?year .\n\
?geoloc geo:lat ?lat ;\n\
    geo:long ?long .\n\
} \n\
}LIMIT 20"

   // $('#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 (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://io.datascience-paris-saclay.fr/js/initExampleHTML.js"  defer > </script>
    </head>
<body style="margin:0;">
<div id="sgvzl_example_query"
   data-sgvizler-endpoint="http://nasa.sparql.pro/sparql"
   data-sgvizler-query="PREFIX xsd: &lt;http://www.w3.org/2001/XMLSchema#&gt; 
PREFIX socrata: &lt;http://www.socrata.com/rdf/terms#&gt;

PREFIX ds: &lt;http://data.nasa.gov/resource/gh4g-9sfh/&gt;
PREFIX geo: &lt;http://www.w3.org/2003/01/geo/wgs84_pos#&gt;

select distinct 
xsd:float(?lat) xsd:float(?long) ?name 
(CONCAT(?rowId,&quot; &quot;,?mass,&quot; &quot;,?nametype,&quot; &quot;,?recclass,&quot; &quot;,?year) as ?description)
?site
where {

GRAPH &lt;https://data.nasa.gov/Space-Science/Meteorite-Landings/gh4g-9sfh&gt; {
 ?site socrata:rowID ?rowId ;
    ds:geolocation ?geoloc ;
    ds:id ?id ;
    ds:mass ?mass ;
    ds:name ?name ;
    ds:nametype ?nametype ;
    ds:recclass ?recclass ;
    ds:year ?year .
?geoloc geo:lat ?lat ;
    geo:long ?long .
} 
}LIMIT 20"
    data-sgvizler-chart='sgvizler.visualization.Map'
    data-sgvizler-chart-options=''
    data-sgvizler-endpoint_output_format='json'
    data-sgvizler-log='2'
    style='width:100%; height:600px;'  />

<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("http://nasa.sparql.pro/sparql")
sparql.setQuery("""
    PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
PREFIX socrata: <http://www.socrata.com/rdf/terms#>

PREFIX ds: <http://data.nasa.gov/resource/gh4g-9sfh/>
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>

select distinct 
xsd:float(?lat) xsd:float(?long) ?name 
(CONCAT(?rowId," ",?mass," ",?nametype," ",?recclass," ",?year) as ?description)
?site
where {

GRAPH <https://data.nasa.gov/Space-Science/Meteorite-Landings/gh4g-9sfh> {
 ?site socrata:rowID ?rowId ;
    ds:geolocation ?geoloc ;
    ds:id ?id ;
    ds:mass ?mass ;
    ds:name ?name ;
    ds:nametype ?nametype ;
    ds:recclass ?recclass ;
    ds:year ?year .
?geoloc geo:lat ?lat ;
    geo:long ?long .
} 
}LIMIT 20""")
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 <- "http://nasa.sparql.pro/sparql"
# create query statement
    query <- "PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
PREFIX socrata: <http://www.socrata.com/rdf/terms#>

PREFIX ds: <http://data.nasa.gov/resource/gh4g-9sfh/>
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>

select distinct 
xsd:float(?lat) xsd:float(?long) ?name 
(CONCAT(?rowId," ",?mass," ",?nametype," ",?recclass," ",?year) as ?description)
?site
where {

GRAPH <https://data.nasa.gov/Space-Science/Meteorite-Landings/gh4g-9sfh> {
 ?site socrata:rowID ?rowId ;
    ds:geolocation ?geoloc ;
    ds:id ?id ;
    ds:mass ?mass ;
    ds:name ?name ;
    ds:nametype ?nametype ;
    ds:recclass ?recclass ;
    ds:year ?year .
?geoloc geo:lat ?lat ;
    geo:long ?long .
} 
}LIMIT 20"
# Step 2 - Use SPARQL package to submit query and save results to a data frame
qd <- SPARQL(endpoint,query)
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 = "http://nasa.sparql.pro/sparql"
sparql = <<-EOT
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
PREFIX socrata: <http://www.socrata.com/rdf/terms#>

PREFIX ds: <http://data.nasa.gov/resource/gh4g-9sfh/>
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>

select distinct 
xsd:float(?lat) xsd:float(?long) ?name 
(CONCAT(?rowId," ",?mass," ",?nametype," ",?recclass," ",?year) as ?description)
?site
where {

GRAPH <https://data.nasa.gov/Space-Science/Meteorite-Landings/gh4g-9sfh> {
 ?site socrata:rowID ?rowId ;
    ds:geolocation ?geoloc ;
    ds:id ?id ;
    ds:mass ?mass ;
    ds:name ?name ;
    ds:nametype ?nametype ;
    ds:recclass ?recclass ;
    ds:year ?year .
?geoloc geo:lat ?lat ;
    geo:long ?long .
} 
}LIMIT 20
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 = 'http://nasa.sparql.pro/sparql';

query = ['PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>  '...
'PREFIX socrata: <http://www.socrata.com/rdf/terms#> '...
' '...
'PREFIX ds: <http://data.nasa.gov/resource/gh4g-9sfh/> '...
'PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#> '...
' '...
'select distinct  '...
'xsd:float(?lat) xsd:float(?long) ?name  '...
'(CONCAT(?rowId," ",?mass," ",?nametype," ",?recclass," ",?year) as ?description) '...
'?site '...
'where { '...
' '...
'GRAPH <https://data.nasa.gov/Space-Science/Meteorite-Landings/gh4g-9sfh> { '...
' ?site socrata:rowID ?rowId ; '...
'    ds:geolocation ?geoloc ; '...
'    ds:id ?id ; '...
'    ds:mass ?mass ; '...
'    ds:name ?name ; '...
'    ds:nametype ?nametype ; '...
'    ds:recclass ?recclass ; '...
'    ds:year ?year . '...
'?geoloc geo:lat ?lat ; '...
'    geo:long ?long . '...
'}  '...
'}LIMIT 20 '];

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 ="http://nasa.sparql.pro/sparql";
$sp_readonly = new SparqlClient();
$sp_readonly->setEndpointRead($endpoint);
$q = <<<EOD
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
PREFIX socrata: <http://www.socrata.com/rdf/terms#>

PREFIX ds: <http://data.nasa.gov/resource/gh4g-9sfh/>
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>

select distinct 
xsd:float(?lat) xsd:float(?long) ?name 
(CONCAT(?rowId," ",?mass," ",?nametype," ",?recclass," ",?year) as ?description)
?site
where {

GRAPH <https://data.nasa.gov/Space-Science/Meteorite-Landings/gh4g-9sfh> {
 ?site socrata:rowID ?rowId ;
    ds:geolocation ?geoloc ;
    ds:id ?id ;
    ds:mass ?mass ;
    ds:name ?name ;
    ds:nametype ?nametype ;
    ds:recclass ?recclass ;
    ds:year ?year .
?geoloc geo:lat ?lat ;
    geo:long ?long .
} 
}LIMIT 20EOD;
$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.Endpoint;
import java.util.ArrayList;
import java.util.HashMap;

public class Main {

    public static void main(String[] args) {
        try {
            Endpoint sp = new Endpoint("http://nasa.sparql.pro/sparql";, false);

            String querySelect = 'PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>  \n'
                    + 'PREFIX socrata: <http://www.socrata.com/rdf/terms#> \n'
                    + ' \n'
                    + 'PREFIX ds: <http://data.nasa.gov/resource/gh4g-9sfh/> \n'
                    + 'PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#> \n'
                    + ' \n'
                    + 'select distinct  \n'
                    + 'xsd:float(?lat) xsd:float(?long) ?name  \n'
                    + '(CONCAT(?rowId," ",?mass," ",?nametype," ",?recclass," ",?year) as ?description) \n'
                    + '?site \n'
                    + 'where { \n'
                    + ' \n'
                    + 'GRAPH <https://data.nasa.gov/Space-Science/Meteorite-Landings/gh4g-9sfh> { \n'
                    + ' ?site socrata:rowID ?rowId ; \n'
                    + '    ds:geolocation ?geoloc ; \n'
                    + '    ds:id ?id ; \n'
                    + '    ds:mass ?mass ; \n'
                    + '    ds:name ?name ; \n'
                    + '    ds:nametype ?nametype ; \n'
                    + '    ds:recclass ?recclass ; \n'
                    + '    ds:year ?year . \n'
                    + '?geoloc geo:lat ?lat ; \n'
                    + '    geo:long ?long . \n'
                    + '}  \n'
                    + '}LIMIT 20 \n';

            HashMap rs = sp.query(querySelect);
            printResult(rs,30);

        }catch(EndpointException eex) {
            System.out.println(eex);
            eex.printStackTrace();
        }
    }

    public static void printResult(HashMap rs , int size) {

      for (String variable : (ArrayList) rs.get("result").get("variables")) {
        System.out.print(String.format("%-"+size+"."+size+"s", variable ) + " | ");
      }
      System.out.print("\n");
      for (HashMap value : (ArrayList>) rs.get("result").get("rows")) {
        //System.out.print(value);
        /* for (String key : value.keySet()) {
         System.out.println(value.get(key));
         }*/
        for (String variable : (ArrayList) rs.get("result").get("variables")) {
          //System.out.println(value.get(variable));
          System.out.print(String.format("%-"+size+"."+size+"s", value.get(variable)) + " | ");
        }
        System.out.print("\n");
      }
    }
}
Project Github BorderCloud/SPARQL-JAVA
Very soon !
TODO