Web Components Binding JSON Files with Geographic Locations

    With the Ignite UI for Web Components map, you can plot geographic data loaded from various file types. For example, you can load geographic locations from JavaScript Object Notation (JSON) file.

    Web Components Binding JSON Files with Geographic Locations Example

    Data Example

    Here is an example of data from JSON file:

    [
   { "name": "Sydney Island", "lat": -16.68972, "lon": 139.45917 },
   { "name": "Sydney Creek",  "lat": -16.3,     "lon": 128.95 },
   { "name": "Mount Sydney",  "lat": -21.39864, "lon": 121.193 },
 // ...
]

    Code Snippet

    The following code loads and binds IgcGeographicHighDensityScatterSeriesComponent in the map component to an array of objects created from loaded JSON file with geographic locations:

    <igc-geographic-map id="geoMap" width="100%" height="100%">

</igc-geographic-map>

    connectedCallback() {
    const url = "../data/WorldCities.json";

    fetch(url)
        .then((response) => response.json())
        .then(data => this.onDataLoaded(data));
}

onDataLoaded(jsonData: any[]) {
    const geoLocations: any[] = [];
    for (const jsonItem of jsonData) {
        if (jsonItem.cap) {
            const location = {
                latitude: jsonItem.lat,
                longitude: jsonItem.lon,
                population: jsonItem.pop,
                city: jsonItem.name,
                country: jsonItem.country
            };
            geoLocations.push(location);
        }
    }

    let geoMap = document.getElementById("geoMap") as IgcGeographicMapComponent;
    let geoSeries : IgcGeographicSymbolSeriesComponent = new IgcGeographicSymbolSeriesComponent();
    geoSeries.dataSource = geoLocations;
    geoSeries.markerType = MarkerType.Circle;
    geoSeries.latitudeMemberPath  = "latitude";
    geoSeries.longitudeMemberPath = "longitude";
    geoSeries.markerBrush = "LightGray";
    geoSeries.markerOutline = "Black";

    geoMap.series.add(geoSeries);
}

    API References