Encountered a style group error 'non-collision' while using Angular with HERE Maps JS API 3.1

Occasionally, I encounter an error when trying to load a HERE map with the satellite base layer:

    Tangram [error]: Error for style group 'non-collision' for tile 13/16/15542/12554/15 Cannot read property 'retain' of undefined: TypeError: Cannot read property 'retain' of undefined
    at https://js.api.here.com/v3/3.1/mapsjs-core.js:377:259708
    at Array.forEach (<anonymous>)
    at https://js.api.here.com/v3/3.1/mapsjs-core.js:377:259679
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke (http://localhost:4200/polyfills.js:3508:26)
    at Object.onInvoke (http://localhost:4200/vendor.js:64284:33)
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke (http://localhost:4200/polyfills.js:3507:52)
    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.run (http://localhost:4200/polyfills.js:3267:43)
    at http://localhost:4200/polyfills.js:4006:34
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (http://localhost:4200/polyfills.js:3540:31)
    at Object.onInvokeTask (http://localhost:4200/vendor.js:64275:33)

This issue occurs intermittently, affecting roughly 30% of page loads initially. Switching to the defaultLayers.vector.normal.map layer enables the tiles to load correctly.

My setup involves Angular 7.2.15 and HERE API 3.1.

The map initialization process is as follows:

const platform = new H.service.Platform({ apikey: apiKey });
const defaultLayers = platform.createDefaultLayers();

const map = new H.Map(
  elementRef.nativeElement,
  defaultLayers.raster.satellite.map,
  {
    zoom: 15,
    center: {lat: 0, lng:0}
  }
);

const behavior = new H.mapevents.Behavior(new H.mapevents.MapEvents(map));

const ui = new H.ui.UI(map);
const zoomControl = new H.ui.ZoomControl();
ui.addControl('zoom', zoomControl);

Is there a way to successfully load the map in satellite view without encountering these errors?

angulartypescripthere-apitangram

Answer №1

It is possible that the behavior issue arises from a HERE JS library loading after the webpage has already loaded. Experiment with adding the satellite layer later in the code to see if it improves the response.

// default map base layer 
var map = new H.Map(document.getElementById('mapContainer'),
  defaultLayers.vector.normal.map,{
  center: {lat:52.5160, lng:13.3779},
  zoom: 13
});
// set base layer later 
map.setBaseLayer(defaultLayers.raster.satellite.map);

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