Elevation not loaded + Profile Job

MichaelVowles — Tue, 05 Apr 2022 11:50:37 GMT

Hi,

I am trying to get the elevation at a point using code very similar to Get elevation at a point | ArcGIS Runtime API for .NET | ArcGIS Developer.

However the following throws an exception "Elevation must be loaded before you can get the elevation".

I am behind a proxy, could that be getting in the way of this working?

Code:

public class ArcGisAdapter { Surface Surface = new Surface(); Uri _elevationUri = new Uri("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer"); public async System.Threading.Tasks.Task<bool> InitializeAsync() { ArcGISRuntimeEnvironment.ApiKey = "<mykey>"; ArcGISRuntimeEnvironment.Initialize(); Surface.ElevationSources.Add(new ArcGISTiledElevationSource(_elevationUri)); await Surface.LoadAsync(); if (( Surface.LoadStatus == LoadStatus.FailedToLoad ) || Surface.LoadStatus == LoadStatus.NotLoaded) { Console.WriteLine($"Failed to load {Surface.LoadError.Message}"); return false; } else { Console.WriteLine($"Loaded elevation {Surface.LoadStatus.ToString()}"); return true; } } public async System.Threading.Tasks.Task<double> GetElevation() { try { // Get the elevation value. var point = new MapPoint(83.9, 28.42); var elevation = await Surface.GetElevationAsync(point); // Set the text displaying the elevation. Console.WriteLine($"{Math.Round(elevation)} m"); return elevation; } catch (Exception e) { Console.WriteLine(e.ToString()); return -1; } } } }

Stack trace:

Re: Elevation not loaded + Profile Job

KoushikHajra — Thu, 07 Apr 2022 18:44:04 GMT

Hi @MichaelVowles,

Thank you for reaching out to us. After taking a look at your code, I have a quick question.

Where are you calling your `GetElevation()` from? Without getting a broader context, it seems like you are loading the surface on a different thread than where you're trying to get the elevation from the surface? What happens if you move these two lines

var point = new MapPoint(83.9, 28.42);
var elevation = await Surface.GetElevationAsync(point);

to after the

await Surface.LoadAsync();

in the InitializeAsync() func?

topic Elevation not loaded + Profile Job in .NET Maps SDK Questions

Elevation not loaded + Profile Job

Re: Elevation not loaded + Profile Job