topic Problem with tile layer which is loaded from package in .NET Maps SDK Questions

Problem with tile layer which is loaded from package

MichaelStruk — Thu, 26 Jan 2017 13:10:14 GMT

I encountered a problem with tile layer.

I initialized map with spatial reference and am trying to display tile map layer from a *.mpk file.

Layer and a map has the same spatial reference WGS 84 (4326 WKID), but layer not displayed.

If i Initialize the map without defining the spatial reference, a layer is displayed.

var map = new Map(SpatialReference.Create(4326));

var layer = new ArcGISTiledLayer(new Uri(source));

map.Basemap.BaseLayers.Add(layer );

EsriMapView.Map = map;

Does anyone encountered this problem?

Thanks for your help

Re: Problem with tile layer which is loaded from package

JenniferNery — Sat, 11 Dec 2021 20:14:21 GMT

            MyMapView.LayerViewStateChanged += MyMapView_LayerViewStateChanged;

            MyMapView.Map = new Map(SpatialReferences.Wgs84);
            MyMapView.Map.Basemap.BaseLayers.Add(new ArcGISTiledLayer(new Uri(@"C:\layer.tpk")));
        }

        private void MyMapView_LayerViewStateChanged(object sender, LayerViewStateChangedEventArgs e)
        {
            // You can check this value and compare with e.Layer.FullExtent
            // MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry)
            if (e.LayerViewState.Status == LayerViewStatus.Active)
                MyMapView.SetViewpoint(new Viewpoint(e.Layer.FullExtent));
        }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

When Map SpatialReference is set upfront, the MapView's viewpoint becomes the entire world's extent. This is why your layer did not appear visible. You can use LayerViewStateChanged to check for the layer's status/error and also update Viewpoint using Layer's full extent.

Re: Problem with tile layer which is loaded from package

MichaelStruk — Fri, 27 Jan 2017 08:35:20 GMT

Thank you so much! Really appreciate your help here.

Re: Problem with tile layer which is loaded from package

FaiyazKhan2 — Wed, 01 Mar 2017 22:55:27 GMT

Hi Jennifer,

I am facing the same problem in UWP project while trying to load offline raster package.
It show "No data" error in e.LayerViewState.Status once loading is done.
The same piece of code works in WPF project template.

Any help is appreciated.

Thanks,

Faiyaz

Re: Problem with tile layer which is loaded from package

AnttiKajanus1 — Thu, 02 Mar 2017 10:24:28 GMT

I have seen that error in situations where the .tpk file exists but it actually doesn't have any data in. This might occurs when you are generating tpk and something funny in the middle. Make sure that you check that the tpk file actually has some data in side (size of the file is larger than 0). Let me know if that helps.

Re: Problem with tile layer which is loaded from package

FaiyazKhan2 — Tue, 14 Mar 2017 05:00:25 GMT

Yeah, it could be an issue when there is no data, however I tried with the attached layer.tpk file by Michael and the same piece of code works with WPF project but not with UWP project.