Web Components Binding CSV Files with Geographic Locations

With the Ignite UI for Web Components map component, you can plot geographic data loaded from various file types. For example, you can load geographic locations from a comma separated values (CSV) file.

Web Components Binding CSV Files with Geographic Locations Example

Data Example

Here is an example of data from CSV file:

City,Lat,Lon,State,Code,County,Density,Population
New York,40.7856,-74.0093,New Jersey,NJ,Hudson,21057,54227
Dundee,42.5236,-76.9775,New York,NY,Yates,579,1650

Code Snippet

The following code loads and binds GeographicHighDensityScatterSeries in the map component to an array of objects created from loaded CSV file with geographic locations.

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

</igc-geographic-map>

connectedCallback() {
    this.geoMap = document.getElementById("geoMap") as IgcGeographicMapComponent;

    const url = "/data/UsaCitiesPopulation.csv";

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

onDataLoaded(csvData: string) {
    const csvLines = csvData.split("\n");
    // parsing CSV data and creating geographic locations
    const geoLocations: any[] = [];

    for (let i = 1; i < csvLines.length; i++) {
        const columns = csvLines[i].split(",");
        const location = {
            latitude:  Number(columns[1]),
            longitude: Number(columns[2]),
            name:  columns[0],
            population: Number(columns[3])
        };
        geoLocations.push(location);
    }

    // creating HD series with loaded data
    const geoSeries = new IgcGeographicHighDensityScatterSeriesComponent();
    geoSeries.name = "hdSeries";
    geoSeries.dataSource = geoLocations;
    geoSeries.latitudeMemberPath  = "latitude";
    geoSeries.longitudeMemberPath = "longitude";
    geoSeries.heatMaximumColor = "Red";
    geoSeries.heatMinimumColor = "Black";
    geoSeries.heatMinimum = 0;
    geoSeries.heatMaximum = 5;
    geoSeries.pointExtent = 1;
    geoSeries.mouseOverEnabled = true;
    // adding symbol series to the geographic amp
    this.geoMap.series.add(geoSeries);
    // zooming to bound of lower 48-states
    const geoBounds = {
        left: -130,
        top: 15,
        width: Math.abs(-130 + 65),
        height: Math.abs(50 - 15)
    };

    this.geoMap.zoomToGeographic(geoBounds);
}

API References