Filter out unique array of objects and return full object using array filter

index.js

var dt = [{"address":"Caër, 27930 Normanville, France","longitude":1.172397,"latitude":49.066906},{"address":"Caër, 27930 Normanville, France","longitude":1.172397,"latitude":49.066906},{"address":"Same, Tanzania","longitude":37.750342,"latitude":-4.0666225},{"address":"Caerphilly CF83, UK","longitude":-3.218134,"latitude":51.578829},{"address":"Caerphilly CF83, UK","longitude":-3.218134,"latitude":51.578829},{"address":"Caerphilly CF83, UK","longitude":-3.218134,"latitude":51.578829},{"address":"Caerphilly CF83, UK","longitude":-3.218134,"latitude":51.578829},{"address":"Caër, 27930 Normanville, France","longitude":1.172397,"latitude":49.066906}];

var flags = {};
var dt = dt.filter(function(entry) {
    if (flags[entry.address]) {
        return false;
    }
    flags[entry.address] = true;
    return true;
});

 console.log(dt);