Sample Code to consume UNData API using JavaScript

Sharing a sample code that can be used to consume UNData API

http://data.un.org/Host.aspx?Content=API

The below code fetches the population data for country India.

Sample Code


var xmlHttp;
// creatng the xmlHttp object
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
// Calling the web service using post and true means asynchronous call
xmlHttp.open("POST", "http://data.un.org/WS/NSIEstatV20Service.asmx", false);

// Setting the request header to let the web service find the soap request we would be sending
xmlHttp.setRequestHeader("Content-Type", "text/xml; charset=utf-8");

xmlHttp.setRequestHeader("SOAPAction", "http://ec.europa.eu/eurostat/sri/service/2.0/extended/GetCompactData");

var soapRequest = "<!--?<span class="hiddenSpellError" pre="" data-mce-bogus="1"-->xml version='1.0' encoding='utf-8'?>"+
"<soap:Envelope xmlns:soap='http://schemas.xmlsoap.org/soap/envelope/' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema'>"+
"<soap:Body>"+
"<GetCompactData xmlns='http://ec.europa.eu/eurostat/sri/service/2.0/extended'>"+
"<Query>"+
"<message:QueryMessage xsi:schemaLocation='http://ec.europa.eu/eurostat/sri/service/2.0/SDMXMessage.xsd http://ec.europa.eu/eurostat/sri/service/2.0/%20SDMXMessage.xsd' xmlns:generic='http://www.SDMX.org/resources/SDMXML/schemas/v2_0/generic' xmlns:message='http://www.SDMX.org/resources/SDMXML/schemas/v2_0/message' xmlns:query='http://www.SDMX.org/resources/SDMXML/schemas/v2_0/query' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>"+
"<message:Header>"+
"<message:ID>onh14833545733929527</message:ID>"+
"<message:Test>false</message:Test>"+
"<message:Prepared>2017-01-01</message:Prepared>"+
"<message:Sender id='online-help' />"+
"</message:Header>"+
"<message:Query>"+
"<query:DataWhere>"+
"<query:And>"+
"<query:Dimension id='INDICATOR'>SP_POP_TOTL</query:Dimension>"+
"<query:Dimension id='AGE'>_T</query:Dimension>"+
"<query:Dimension id='SEX'>_T</query:Dimension>"+
"<query:Dimension id='LOCATION'>_T</query:Dimension>" +
"<query:Dimension id='REF_AREA'>DEU</query:Dimension>" +
"<query:Dimension id='SCENARIO'>H</query:Dimension>"+
"<query:Time>"+
"<query:StartTime>2014-01-02</query:StartTime>"+
"<query:EndTime>2017-01-02</query:EndTime>"+
"</query:Time>"+
"<query:Dataflow>DF_UNDATA_WPP</query:Dataflow>"+
"</query:And>"+
"</query:DataWhere>"+
"</message:Query>"+
"</message:QueryMessage>"+
"</Query>"+
"</GetCompactData>"+
"</soap:Body>" +
"</soap:Envelope>";

xmlHttp.send(soapRequest);
var xmlDoc = jQuery.parseXML(xmlHttp.responseText);
var popValue = xmlDoc.getElementsByTagName('ns1:Obs')['0'].attributes['OBS_VALUE'].nodeValue;
alert("Total Population " + popValue);

Output


<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body><GetCompactDataResponse
xmlns="http://ec.europa.eu/eurostat/sri/service/2.0/extended">
<GetCompactDataResult>
<CompactData
xmlns:ns1="urn:sdmx:org.sdmx.infomodel.datastructure.DataStructure
=UNSD:DSD_WPP_UNDATA(1.0):ObsLevelDim:TIME_PERIOD"
xmlns="http://www.SDMX.org/resources/SDMXML/schemas/v2_0/message"
xmlns:common="http://www.SDMX.org/resources/SDMXML/schemas/v2_0/common"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xml="http://www.w3.org/XML/1998/namespace"><Header>
<ID>DF_UNDATA_WPP</ID><Test>false</Test><Prepared>2017-01-06T08:25:46
</Prepared>
<Sender id="1B0">
<Name xml:lang="en">United Nations Statistics Division</Name>
<Contact><Email>statistics@un.org</Email></Contact></Sender>
<KeyFamilyRef>DSD_WPP_UNDATA</KeyFamilyRef><KeyFamilyAgency>UNSD
</KeyFamilyAgency><DataSetAgency>UNSD</DataSetAgency>
<DataSetID>DF_UNDATA_WPP_1B0_2017-01-06T082546</DataSetID>
<DataSetAction>Information</DataSetAction>
<Extracted>2017-01-06T08:25:46</Extracted>
<Source xml:lang="en">
United Nations Population Division World Population Prospects</Source>
</Header>
<ns1:DataSet DATASET_NAME="World Population Prospects"
DATASET_SOURCE="United Nations Population Division"
DATASET_DESC="The United Nations World Population Prospects contains estimates and projections for every country in the world, including estimates and projections of demographic indicators such as birth rates, deaths rates, infant mortality rates and life expectancy." UNDATA_LASTUPDATE="20 Aug 2013" UNDATA_NEXTUPDATE="2015 release" METADATA="http://esa.un.org/unpd/wpp/index.htm"><ns1:Series AGE="_T" FREQ="A" INDICATOR="SP_POP_TOTL" LOCATION="_T" SEX="_T" REF_AREA="DEU" SCENARIO="H"><ns1:Obs TIME_PERIOD="2015" OBS_VALUE="83178.615" UNIT="NUMBER" UNIT_MULT="3" TIME_SPAN="2015" /></ns1:Series></ns1:DataSet></CompactData></GetCompactDataResult></GetCompactDataResponse></soap:Body></soap:Envelope>

Hope it helps.

Sample code to consume UNData API in C#

Hi,

Recently we were working on an application that had to fetch country specific details. For this we used the UNData API.

http://data.un.org/Host.aspx?Content=API

We can make use of SDMX Browser in helping us to write a query

http://data.un.org/SdmxBrowser/start

Create a console app\windows application and add web reference to the following web service

http://data.un.org/WS/NSIEstatV20Service.asmx

Below is the sample C# Code


string queryMsg = @"<message:QueryMessage
xsi:schemaLocation='http://ec.europa.eu/eurostat/sri/service/2.0/SDMXMessage.xsd
http://ec.europa.eu/eurostat/sri/service/2.0/%20SDMXMessage.xsd'
xmlns:generic='http://www.SDMX.org/resources/SDMXML/schemas/v2_0/generic'
xmlns:message='http://www.SDMX.org/resources/SDMXML/schemas/v2_0/message'
xmlns:query='http://www.SDMX.org/resources/SDMXML/schemas/v2_0/query'
xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>
<message:Header>
<message:ID>onh14833545733929527</message:ID>
<message:Test>false</message:Test>
<message:Prepared>2017-01-01</message:Prepared>
<message:Sender id='online-help'/>
</message:Header>
<message:Query>
<query:DataWhere>
<query:And>
<query:Dimension id='INDICATOR'>SP_POP_TOTL</query:Dimension>
<query:Dimension id='AGE'>_T</query:Dimension>
<query:Dimension id='SEX'>_T</query:Dimension>
<query:Dimension id='LOCATION'>_T</query:Dimension>
<query:Dimension id='REF_AREA'>IND</query:Dimension>
<query:Time>
<query:StartTime>2014-01-02</query:StartTime>
<query:EndTime>2017-01-02</query:EndTime>
</query:Time>
<query:Dataflow>DF_UNDATA_WPP</query:Dataflow>
</query:And>
</query:DataWhere>
</message:Query>
</message:QueryMessage>";
NSIEstatV20Service service = new NSIEstatV20Service();
System.Xml.XmlDocument queryMessageDocument = new XmlDocument();
queryMessageDocument.LoadXml(queryMsg);
System.Xml.XmlNode queryMessage = queryMessageDocument.DocumentElement;
var result = service.GetCompactData(queryMessage);
MessageBox.Show(result.InnerXml);

The output

The query here basically returns the Total population of India

Hope it helps..