Problems to display vectortiles map from server- resolution and turning white

GunnarGisleberg

Hei

In a test map application opening a vector tile server and hope to get helpt to resolve these issues:

- Is the the resolution of the map display automatic - only controlled by the server ?

- Is there a possible approach to check why the map information turns white when zooming

 

The map is only visible when zooming far out - and then the display is very pixelated

When zooming in it turns white:

Zoom a little and then map detailed information is invisible

 

GKmieliauskas

You could subscribe for map scale property changing event in MainPage constructor and check these values 

mapView.PropertyChanged += (o, e) =>
{
    if (e.PropertyName == nameof(mapView.MapScale))
    {
        var currentScale = mapView.MapScale;
        // depends on your map layers structure
        ArcGISVectorTiledLayer layer = mapView.Map.Basemap.BaseLayers.OfType<ArcGISVectorTiledLayer>().FirstOrDefault();
        var vectorTileSourceInfo = layer.SourceInfo;
        var layerMinScale = vectorTileSourceInfo.MinScale;
        var layerMaxScale = vectorTileSourceInfo.MaxScale;

        // To view layer correctly currectScale mus be <= layerMinScale and >= layerMaxScale
    }
};