Question

我有一个RESTapi，它从mongoDB中提取数据，并使用以下代码将其作为JSON数组传递给我的mapbox gl应用程序：

$.ajax(
            {
                type: "GET",
                contentType: "application/json; charset=utf-8",
                url: myUrl,
                cache: false,
                async: true,
                timeout: 5000,
                dataType: "json",
                success: function (data)
                {
                    console.log("Reading Data");
                    console.log(data);
                },
                error: function (xhr, ajaxOptions, thrownError)
                {
                    console.log("http Status Response: " + xhr.status);
                    console.log(thrownError);
                }
            });

数据作为单独的文档存储在mongo中，get以下列格式提取。

[
        {
            "_id": "588a3d5a524da321dd937891",
            "__v": 0,
            "geometry": {
                "type": "Point",
                "coordinates": [ -113.5299938027191, 53.42859997065679 ]
            },
            "type": "Feature",
            "properties": {
                "icon": "horse-riding-15",
                "title": "A Horse",
                "description": "A Horse description",
                "date": "2017-01-26T18:18:02.175Z"
            }
        },
        {
            "_id": "588ac68aa99e6a38134997b5",
            "__v": 0,
            "geometry": {
                "type": "Point",
                "coordinates": [ -113.56076949999999, 53.4528447 ]
            },
            "type": "Feature",
            "properties": {
                "icon": "dog-park-15",
                "title": "A Dog",
                "description": "A Dog description",
                "date": "2017-01-27T04:03:22.381Z"
            }
        }
]

要在mapbox中读取它，它必须是GeoJSON Feature Collection的一部分，它应该如下所示（开头的额外类型信息和{}包装器）：

{
    "type": "FeatureCollection",
    "features":     [
            {
                "_id": "588a3d5a524da321dd937891",
                "__v": 0,
                "geometry": {
                    "type": "Point",
                    "coordinates": [ -113.5299938027191, 53.42859997065679 ]
                },
                "type": "Feature",
                "properties": {
                    "icon": "horse-riding-15",
                    "title": "A Horse",
                    "description": "A Horse description",
                    "date": "2017-01-26T18:18:02.175Z"
                }
            },
            {
                "_id": "588ac68aa99e6a38134997b5",
                "__v": 0,
                "geometry": {
                    "type": "Point",
                    "coordinates": [ -113.56076949999999, 53.4528447 ]
                },
                "type": "Feature",
                "properties": {
                    "icon": "dog-park-15",
                    "title": "A Dog",
                    "description": "A Dog description",
                    "date": "2017-01-27T04:03:22.381Z"
                }
            }
    ]
}

我不确定是否有首选的转换方法，我缺少的技巧，或者某些客户端代码在下载后重新格式化并添加额外数据，但我不知道。我不确定添加额外包装数据的最佳方法是什么。

Answer 1

您可以创建自己的对象以获得所需的输出。这个例子可能会帮助你。

＆＃13;

var dataReturned = [
        {
            "_id": "588a3d5a524da321dd937891",
            "__v": 0,
            "geometry": {
                "type": "Point",
                "coordinates": [ -113.5299938027191, 53.42859997065679 ]
            },
            "type": "Feature",
            "properties": {
                "icon": "horse-riding-15",
                "title": "A Horse",
                "description": "A Horse description",
                "date": "2017-01-26T18:18:02.175Z"
            }
        },
        {
            "_id": "588ac68aa99e6a38134997b5",
            "__v": 0,
            "geometry": {
                "type": "Point",
                "coordinates": [ -113.56076949999999, 53.4528447 ]
            },
            "type": "Feature",
            "properties": {
                "icon": "dog-park-15",
                "title": "A Dog",
                "description": "A Dog description",
                "date": "2017-01-27T04:03:22.381Z"
            }
        }
];



var geoJSON = {};

geoJSON["type"] = "FeatureCollection";
geoJSON["features"] = dataReturned;


console.log(JSON.stringify(geoJSON));

＆＃13;

如何将JSON文档集合转换为GeoJSON FeatureCollection

1 个答案: