JavaScript
//Example data, JSON Object
var input_json = [{
"fcodeName": "capital of a political entity",
"toponymName": "Mexico City",
"countrycode": "MX",
"fcl": "P",
"fclName": "city, village,...",
"name": "Mexiko-Stadt",
"wikipedia": "en.wikipedia.org/wiki/Mexico_City",
"lng": -99.12766456604,
"fcode": "PPLC",
"geonameId": 3530597,
"lat": 19.428472427036,
"population": 12294193
}, {
"fcodeName": "capital of a political entity",
"toponymName": "Beijing",
"countrycode": "CN",
"fcl": "P",
"fclName": "city, village,...",
"name": "Peking",
"wikipedia": "en.wikipedia.org/wiki/Beijing",
"lng": 116.397228240967,
"fcode": "PPLC",
"geonameId": 1816670,
"lat": 39.9074977414405,
"population": 11716620
}, {
"fcodeName": "capital of a political entity",
"toponymName": "Manila",
"countrycode": "PH",
"fcl": "P",
"fclName": "city, village,...",
"name": "Manila",
"wikipedia": "en.wikipedia.org/wiki/Manila",
"lng": 120.9822,
"fcode": "PPLC",
"geonameId": 1701668,
"lat": 14.6042,
"population": 10444527
}, {
"fcodeName": "capital of a political entity",
"toponymName": "Dhaka",
"countrycode": "BD",
"fcl": "P",
"fclName": "city, village,...",
"name": "Dhaka",
"wikipedia": "en.wikipedia.org/wiki/Dhaka",
"lng": 90.40743827819824,
"fcode": "PPLC",
"geonameId": 1185241,
"lat": 23.710395616597037,
"population": 10356500
}, {
"fcodeName": "capital of a political entity",
"toponymName": "Seoul",
"countrycode": "KR",
"fcl": "P",
"fclName": "city, village,...",
"name": "Seoul",
"wikipedia": "en.wikipedia.org/wiki/Seoul",
"lng": 126.9784,
"fcode": "PPLC",
...