Sample cartography updates (#526)

* WMS layer URL updates for all platforms

Only tested and screenshotted for Windows.

* Open Scene (portal item) data updated

Tested and screenshots taken for Windows only

* Raster layer URL - data update

Tested and screenshots taken for Windows only

* Update data for show labels on layer

Tested and screenshots taken for Windows only

* Feature layer selection data update

Tested and screenshots taken on Windows only

* Updated data for stats query group sort

Tested on Windows only

* Update data source for feature layer query

No substantive code changes. Tested on Windows

* Android screenshots

* Forms screenshots

* iOS screenshots

* Readme updates

* Update UWP viewer to better handle different readme formats

Problem was related to how image tags are rendered by the markdown tool.

* Update forms viewer to better handle diff. readme formats

src/Android/Xamarin.Android/Samples/Data/FeatureLayerQuery/FeatureLayerQuery.cs

@@ -28,12 +28,12 @@ namespace ArcGISRuntime.Samples.FeatureLayerQuery
     [ArcGISRuntime.Samples.Shared.Attributes.Sample(
         "Feature layer query",
         "Data",
-        "This sample demonstrates how to query a feature layer via feature table.",
+        "Query a feature layer via a feature table.",
         "The sample provides a search bar on the top, where you can input the name of a US State. When you hit search the app performs a query on the feature table and based on the result either highlights the state geometry or provides an error.")]
     public class FeatureLayerQuery : Activity
     {
         // Create reference to service of US States
-        private string _statesUrl = "http://sampleserver6.arcgisonline.com/arcgis/rest/services/USA/MapServer/2";
+        private string _statesUrl = "https://services.arcgis.com/jIL9msH9OI208GCb/arcgis/rest/services/USA_Daytime_Population_2016/FeatureServer/0";
 
         // Create and hold reference to the used MapView
         private MapView _myMapView = new MapView();
@@ -73,9 +73,10 @@ private void Initialize()
             // Create feature layer using this feature table
             _featureLayer = new FeatureLayer(_featureTable)
             {
-
                 // Set the Opacity of the Feature Layer
-                Opacity = 0.6
+                Opacity = 0.6,
+                // Work around service setting
+                MaxScale = 10
             };
 
             // Create a new renderer for the States Feature Layer.

src/Android/Xamarin.Android/Samples/Data/StatsQueryGroupAndSort/StatsQueryGroupAndSort.cs

@@ -25,12 +25,12 @@ namespace ArcGISRuntime.Samples.StatsQueryGroupAndSort
     [ArcGISRuntime.Samples.Shared.Attributes.Sample(
         "Statistical query group and sort results",
         "Data",
-        "This sample demonstrates how to query a feature table to get statistics for a specified field and to group and sort the results.",
+        "Query a feature table to get grouped, sorted statistics.",
         "")]
     public class StatsQueryGroupAndSort : Activity
     {
         // URI for the US states map service
-        private Uri _usStatesServiceUri = new Uri("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3");
+        private Uri _usStatesServiceUri = new Uri("https://services.arcgis.com/jIL9msH9OI208GCb/arcgis/rest/services/Counties_Obesity_Inactivity_Diabetes_2013/FeatureServer/0");
 
         // US states feature table
         private FeatureTable _usStatesTable;
@@ -242,6 +242,9 @@ private async void ExecuteStatisticsQuery(object sender, EventArgs e)
                 }
             }
 
+            // Ignore counties with missing data
+            statQueryParams.WhereClause = "\"State\" IS NOT NULL";
+
             // Execute the statistical query with these parameters and await the results
             StatisticsQueryResult statQueryResult = await _usStatesTable.QueryStatisticsAsync(statQueryParams);
 

src/Android/Xamarin.Android/Samples/Layers/FeatureLayerSelection/FeatureLayerSelection.cs

@@ -16,21 +16,22 @@
 using Esri.ArcGISRuntime.UI.Controls;
 using System;
 using System.Drawing;
+using Esri.ArcGISRuntime;
 
 namespace ArcGISRuntime.Samples.FeatureLayerSelection
 {
     [Activity]
     [ArcGISRuntime.Samples.Shared.Attributes.Sample(
         "Feature layer selection",
         "Layers",
-        "This sample demonstrates how to select features in a feature layer by tapping a MapView.",
+        "Select features by tapping a MapView.",
         "")]
     public class FeatureLayerSelection : Activity
     {
-        // Create and hold reference to the used MapView
-        private MapView _myMapView = new MapView();
+        // Create and hold reference to the used MapView.
+        private readonly MapView _myMapView = new MapView();
 
-        // Create and hold reference to the feature layer
+        // Hold reference to the feature layer.
         private FeatureLayer _featureLayer;
 
         protected override void OnCreate(Bundle bundle)
@@ -39,107 +40,103 @@ protected override void OnCreate(Bundle bundle)
 
             Title = "Feature layer selection";
 
-            // Create the UI, setup the control references and execute initialization
             CreateLayout();
             Initialize();
         }
 
         private async void Initialize()
         {
-            // Create new Map with basemap
-            Map myMap = new Map(Basemap.CreateTopographic());
+            // Create new Map with basemap.
+            Map myMap = new Map(Basemap.CreateLightGrayCanvas());
 
-            // Create envelope to be used as a target extent for map's initial viewpoint
-            Envelope myEnvelope = new Envelope(-128, 50, -62, 18, SpatialReferences.Wgs84);
+            // Create envelope to be used as a target extent for map's initial viewpoint.
+            Envelope myEnvelope = new Envelope(-6603299.491810, 1679677.742046, 9002253.947487, 8691318.054732, SpatialReferences.WebMercator);
 
-            // Set the initial viewpoint for map
+            // Set the initial viewpoint for map.
             myMap.InitialViewpoint = new Viewpoint(myEnvelope);
 
-            // Provide used Map to the MapView
+            // Provide used Map to the MapView.
             _myMapView.Map = myMap;
 
-            // Create Uri for the feature service
+            // Create Uri for the feature service.
             Uri featureServiceUri = new Uri(
-                "http://sampleserver6.arcgisonline.com/arcgis/rest/services/DamageAssessment/FeatureServer/0");
+                "https://services1.arcgis.com/4yjifSiIG17X0gW4/arcgis/rest/services/GDP_per_capita_1960_2016/FeatureServer/0");
 
-            // Initialize feature table using a url to feature server url
+            // Initialize feature table using a URL to feature server.
             ServiceFeatureTable featureTable = new ServiceFeatureTable(featureServiceUri);
 
-            // Initialize a new feature layer based on the feature table
+            // Initialize a new feature layer based on the feature table.
             _featureLayer = new FeatureLayer(featureTable)
             {
-                // Set the selection color for feature layer
                 SelectionColor = Color.Cyan,
-
-                // Set the selection width
                 SelectionWidth = 3
             };
 
-            // Make sure that used feature layer is loaded before we hook into the tapped event
-            // This prevents us trying to do selection on the layer that isn't initialized
+            // Make sure that used feature layer is loaded before hooking into the tapped event
+            // This prevents trying to do selection on the layer that isn't initialized.
             await _featureLayer.LoadAsync();
 
-            // Check for the load status. If the layer is loaded then add it to map
-            if (_featureLayer.LoadStatus == Esri.ArcGISRuntime.LoadStatus.Loaded)
+            // Check for the load status. If the layer is loaded then add it to map.
+            if (_featureLayer.LoadStatus == LoadStatus.Loaded)
             {
-                // Add the feature layer to the map
+                // Add the feature layer to the map.
                 myMap.OperationalLayers.Add(_featureLayer);
 
-                // Add tap event handler for mapview
+                // Add tap event handler for mapview.
                 _myMapView.GeoViewTapped += OnMapViewTapped;
             }
         }
 
         private async void OnMapViewTapped(object sender, GeoViewInputEventArgs e)
         {
-            // Define the selection tolerance
+            // Define the selection tolerance.
             double tolerance = 15;
 
-            // Convert the tolerance to map units
+            // Convert the tolerance to map units.
             double mapTolerance = tolerance * _myMapView.UnitsPerPixel;
 
-            // Get the tapped point
+            // Get the tapped point.
             MapPoint geometry = e.Location;
 
-            // Normalize the geometry if wrap-around is enabled
-            //    This is necessary because of how wrapped-around map coordinates are handled by Runtime
+            // Normalize the geometry if wrap-around is enabled.
+            //    This is necessary because of how wrapped-around map coordinates are handled by Runtime.
             //    Without this step, querying may fail because wrapped-around coordinates are out of bounds.
             if (_myMapView.IsWrapAroundEnabled)
             {
                 geometry = (MapPoint)GeometryEngine.NormalizeCentralMeridian(geometry);
             }
 
-            // Define the envelope around the tap location for selecting features
+            // Define the envelope around the tap location for selecting features.
             Envelope selectionEnvelope = new Envelope(geometry.X - mapTolerance, geometry.Y - mapTolerance, geometry.X + mapTolerance,
                 geometry.Y + mapTolerance, _myMapView.Map.SpatialReference);
 
-            // Define the query parameters for selecting features
+            // Define the query parameters for selecting features.
             QueryParameters queryParams = new QueryParameters
             {
-                // Set the geometry to selection envelope for selection by geometry
+                // Set the geometry to selection envelope for selection by geometry.
                 Geometry = selectionEnvelope
             };
 
-            // Select the features based on query parameters defined above
+            // Select the features based on query parameters defined above.
             await _featureLayer.SelectFeaturesAsync(queryParams, SelectionMode.New);
         }
 
         private void CreateLayout()
         {
-            // Create a new vertical layout for the app
+            // Create a new vertical layout for the app.
             LinearLayout layout = new LinearLayout(this) { Orientation = Orientation.Vertical };
 
-            // Create and add a help label
+            // Create and add a help label.
             TextView helpLabel = new TextView(this)
             {
                 Text = "Tap to select features."
             };
             layout.AddView(helpLabel);
 
-            // Add the map view to the layout
+            // Add the map view to the layout.
             layout.AddView(_myMapView);
 
-            // Show the layout in the app
+            // Show the layout in the app.
             SetContentView(layout);
         }
     }

src/Android/Xamarin.Android/Samples/Layers/RasterLayerImageServiceRaster/RasterLayerImageServiceRaster.cs

@@ -10,9 +10,9 @@
 using Android.App;
 using Android.OS;
 using Android.Widget;
+using Esri.ArcGISRuntime.Geometry;
 using Esri.ArcGISRuntime.Mapping;
 using Esri.ArcGISRuntime.Rasters;
-using Esri.ArcGISRuntime.ArcGISServices;
 using Esri.ArcGISRuntime.UI.Controls;
 using System;
 
@@ -22,68 +22,59 @@ namespace ArcGISRuntime.Samples.RasterLayerImageServiceRaster
     [ArcGISRuntime.Samples.Shared.Attributes.Sample(
         "ArcGIS raster layer (service)",
         "Layers",
-        "This sample demonstrates how to show a raster layer on a map based on an image service layer.",
+        "Add a raster layer from an image service to a map.",
         "")]
     public class RasterLayerImageServiceRaster : Activity
     {
-        // Create and hold reference to the used MapView
-        private MapView _myMapView = new MapView();
+        // Create and hold reference to the used MapView.
+        private readonly MapView _myMapView = new MapView();
 
         protected override void OnCreate(Bundle bundle)
         {
             base.OnCreate(bundle);
 
             Title = "ArcGIS raster layer (service)";
 
-            // Create the UI, setup the control references and execute initialization 
             CreateLayout();
             Initialize();
         }
 
         private async void Initialize()
         {
-            // Create new map with the dark gray canvas basemap
+            // Create new map with the dark gray canvas basemap.
             Map myMap = new Map(Basemap.CreateDarkGrayCanvasVector());
 
-            // Create a Uri to the image service raster
-            Uri myUri = new Uri("http://sampleserver6.arcgisonline.com/arcgis/rest/services/NLCDLandCover2001/ImageServer");
+            // Create a Uri to the image service raster.
+            Uri myUri = new Uri("https://gis.ngdc.noaa.gov/arcgis/rest/services/bag_hillshades/ImageServer");
 
-            // Create new image service raster from the Uri
+            // Create new image service raster from the Uri.
             ImageServiceRaster myImageServiceRaster = new ImageServiceRaster(myUri);
 
-            // Load the image service raster
+            // Load the image service raster.
             await myImageServiceRaster.LoadAsync();
 
-            // Get the service information (aka. metadata) about the image service raster
-            ArcGISImageServiceInfo myArcGISImageServiceInfo = myImageServiceRaster.ServiceInfo;
-
-            // Create a new raster layer from the image service raster
+            // Create a new raster layer from the image service raster.
             RasterLayer myRasterLayer = new RasterLayer(myImageServiceRaster);
 
-            // Add the raster layer to the maps layer collection
+            // Add the raster layer to the maps layer collection.
             myMap.Basemap.BaseLayers.Add(myRasterLayer);
 
-            // Assign the map to the map view
+            // Assign the map to the map view.
             _myMapView.Map = myMap;
 
-            // Zoom the map to the extent of the image service raster (which also the extent of the raster layer)
-            await _myMapView.SetViewpointGeometryAsync(myArcGISImageServiceInfo.FullExtent);
-
-            // NOTE: The sample zooms to the extent of the ImageServiceRaster. Currently the ArcGIS Runtime does not 
-            // support zooming a RasterLayer out beyond 4 times it's published level of detail. The sample uses 
-            // MapView.SetViewpointCenterAsync() method to ensure the image shows when the app starts. You can see 
-            // the effect of the image service not showing when you zoom out to the full extent of the image and beyond.        }
+            // zoom in to the San Francisco Bay.
+            await _myMapView.SetViewpointCenterAsync(new MapPoint(-13643095.660131, 4550009.846004, SpatialReferences.WebMercator), 100000);
         }
 
         private void CreateLayout()
         {
-            // Create a new vertical layout for the app
+            // Create a new vertical layout for the app.
             LinearLayout layout = new LinearLayout(this) { Orientation = Orientation.Vertical };
 
-            // Add the map view to the layout
+            // Add the map view to the layout.
             layout.AddView(_myMapView);
 
-            // Show the layout in the app
+            // Show the layout in the app.
             SetContentView(layout);
         }
     }