ClemensFischer/XAML-Map-Control
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Updated WMTS implementation

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This commit is contained in:
ClemensF 2020-04-15 20:46:16 +02:00
parent 375c5d0b58
commit 209d06adf5
6 changed files with 243 additions and 205 deletions
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109
MapControl/Shared/WmtsTileLayer.cs
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@ -6,7 +6,6 @@ using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Xml.Linq;
#if WINDOWS_UWP
using Windows.Foundation;
using Windows.UI.Xaml;
@ -79,6 +78,7 @@ namespace MapControl
protected override void TileSourcePropertyChanged()
{
UpdateTileLayer();
}
protected override void UpdateTileLayer()
@ -160,7 +160,6 @@ namespace MapControl
foreach (var layer in ChildLayers)
{
layer.UpdateTiles();
tiles.AddRange(layer.Tiles);
}
@ -177,7 +176,7 @@ namespace MapControl
}
}
TileImageLoader.LoadTilesAsync(tiles, TileSource, sourceName);
TileImageLoader.LoadTilesAsync(tiles, tileSource, sourceName);
}
private async void OnLoaded(object sender, RoutedEventArgs e)
@ -186,17 +185,13 @@ namespace MapControl
{
try
{
if (CapabilitiesUri.IsAbsoluteUri && (CapabilitiesUri.Scheme == "http" || CapabilitiesUri.Scheme == "https"))
{
using (var stream = await ImageLoader.HttpClient.GetStreamAsync(CapabilitiesUri))
{
ReadCapabilities(XDocument.Load(stream).Root);
}
}
else
{
ReadCapabilities(XDocument.Load(CapabilitiesUri.ToString()).Root);
}
var capabilities = await WmtsCapabilities.ReadCapabilities(CapabilitiesUri, LayerIdentifier);
TileMatrixSets.Clear();
capabilities.TileMatrixSets.ForEach(s => TileMatrixSets.Add(s.SupportedCrs, s));
LayerIdentifier = capabilities.LayerIdentifier;
TileSource = capabilities.TileSource;
}
catch (Exception ex)
{
@ -204,91 +199,5 @@ namespace MapControl
}
}
}
private void ReadCapabilities(XElement capabilitiesElement)
{
TileMatrixSets.Clear();
XNamespace ns = capabilitiesElement.Name.Namespace;
XNamespace ows = "http://www.opengis.net/ows/1.1";
var contentsElement = capabilitiesElement.Element(ns + "Contents");
if (contentsElement == null)
{
throw new ArgumentException("Contents element not found.");
}
XElement layerElement;
if (!string.IsNullOrEmpty(LayerIdentifier))
{
layerElement = contentsElement.Descendants(ns + "Layer")
.FirstOrDefault(e => e.Element(ows + "Identifier")?.Value == LayerIdentifier);
if (layerElement == null)
{
throw new ArgumentException("Layer element \"" + LayerIdentifier + "\" not found.");
}
}
else
{
layerElement = capabilitiesElement.Descendants(ns + "Layer").FirstOrDefault();
if (layerElement == null)
{
throw new ArgumentException("No Layer element found.");
}
LayerIdentifier = layerElement.Element(ows + "Identifier")?.Value ?? "";
}
var urlTemplate = layerElement.Element(ns + "ResourceURL")?.Attribute("template")?.Value;
if (string.IsNullOrEmpty(urlTemplate))
{
throw new ArgumentException("No valid ResourceURL element found in Layer \"" + LayerIdentifier + "\".");
}
var styleElement = layerElement.Descendants(ns + "Style")
.FirstOrDefault(e => e.Attribute("isDefault")?.Value == "true");
if (styleElement == null)
{
styleElement = layerElement.Descendants(ns + "Style").FirstOrDefault();
}
var style = styleElement?.Element(ows + "Identifier")?.Value;
if (string.IsNullOrEmpty(style))
{
throw new ArgumentException("No valid Style element found in Layer \"" + LayerIdentifier + "\".");
}
var tileMatrixSetIds = layerElement
.Descendants(ns + "TileMatrixSetLink")
.Select(e => e.Element(ns + "TileMatrixSet")?.Value)
.Where(id => !string.IsNullOrEmpty(id))
.ToList();
foreach (var tileMatrixSetId in tileMatrixSetIds)
{
var tileMatrixSetElement = capabilitiesElement.Descendants(ns + "TileMatrixSet")
.FirstOrDefault(e => e.Element(ows + "Identifier")?.Value == tileMatrixSetId);
if (tileMatrixSetElement == null)
{
throw new ArgumentException("Linked TileMatrixSet element not found in Layer \"" + LayerIdentifier + "\".");
}
var tileMatrixSet = WmtsTileMatrixSet.Create(tileMatrixSetElement);
TileMatrixSets.Add(tileMatrixSet.SupportedCrs, tileMatrixSet);
}
TileSource = new WmtsTileSource(urlTemplate.Replace("{Style}", style));
UpdateTileLayer();
}
}
}