[
{
    "post_id": 77,
    "post_title": "Delhi",
    "post_content": "DelhiDelhiDelhi",
    "post_date": "2017-07-24 11:47:08",
    "imageurl": false,
    "cat_name": [
        {
            "term_id": 7,
            "name": "FOODIE",
            "slug": "foodie",
            "category_parent": 0
        }
    ],
    "longitude": "75.857849",
    "latitude": "33.888586",
    "region_name": "Asia"
},
{
    "post_id": 75,
    "post_title": "Goa",
    "post_content": "this is goa",
    "post_date": "2017-07-24 11:03:59",
    "imageurl": false,
    "cat_name": [
        {
            "term_id": 7,
            "name": "FOODIE",
            "slug": "foodie",
            "category_parent": 0
        }
    ],
    "longitude": "75.857849",
    "latitude": "33.888586",
    "region_name": "Asia"
}]

this.MapData.forEach(map => {
        this.Mapdatalist.push({
            postid: map.post_id,
            regionname: map.region_name,
            longitude: map.longitude

        });
    });

for (let data of this.MapData)
    {
        console.log("error",data);

    }