Data gathered from Cesium through KML polling

I have an application where KML data is continuously generated and updated every second. Currently, I am displaying this data on a Cesium map using the following code:

var viewer = new Cesium.Viewer('cesiumContainer');
viewer.dataSources.add(Cesium.KmlDataSource.load('link to live data stream'));

While this setup works well for the initial data display, it does not update dynamically with new information. What would be the most efficient approach to refresh the KML data in Cesium every one or two seconds to ensure that the map reflects real-time changes?

Thank you!

javascriptrestcesiumjs

Answer №1

Starting from Cesium version 1.19 (2016-03), the KML Data Source now fully supports NetworkLinks with refreshMode=onInterval. This means that when the designated interval is reached, the KML data source will automatically update within Cesium. If the KML file can auto-update in Google Earth, it should seamlessly do so in Cesium as well.

Given that Cesium operates as a web-based application, it's essential to consider cross-domain requests. If the KML URL is hosted on a different server than the one hosting the Cesium HTML pages, ensure that the service for the KML includes the Access-Control-Allow-Origin property in the HTTP headers of the response. Failure to do so may result in loading issues.

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