ClemensFischer/XAML-Map-Control
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TileSources, WMTS

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ClemensFischer 2025-10-29 18:59:19 +01:00
parent 605185db6e
commit ce7c33f6e4
7 changed files with 70 additions and 63 deletions
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64
MapControl/Shared/WmtsCapabilities.cs
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@ -23,28 +23,28 @@ namespace MapControl
private static readonly XNamespace xlink = "http://www.w3.org/1999/xlink";
public string Layer { get; private set; }
public string UrlTemplate { get; private set; }
public string UriTemplate { get; private set; }
public List<WmtsTileMatrixSet> TileMatrixSets { get; private set; }
public static async Task<WmtsCapabilities> ReadCapabilitiesAsync(Uri uri, string layer)
{
Stream xmlStream;
string defaultUrl = null;
string defaultUri = null;
if (!uri.IsAbsoluteUri)
{
xmlStream = File.OpenRead(uri.OriginalString);
}
else if (uri.Scheme == Uri.UriSchemeHttp || uri.Scheme == Uri.UriSchemeHttps)
{
defaultUrl = uri.OriginalString.Split('?')[0];
xmlStream = await ImageLoader.HttpClient.GetStreamAsync(uri);
}
else if (uri.IsFile)
{
xmlStream = File.OpenRead(uri.LocalPath);
}
else if (uri.Scheme == Uri.UriSchemeHttp || uri.Scheme == Uri.UriSchemeHttps)
{
defaultUri = uri.OriginalString.Split('?')[0];
xmlStream = await ImageLoader.HttpClient.GetStreamAsync(uri);
}
else
{
throw new ArgumentException($"Invalid Capabilities URI: {uri}");
@ -54,10 +54,10 @@ namespace MapControl
var element = await XDocument.LoadRootElementAsync(stream);
return ReadCapabilities(element, layer, defaultUrl);
return ReadCapabilities(element, layer, defaultUri);
}
public static WmtsCapabilities ReadCapabilities(XElement capabilitiesElement, string layer, string defaultUrl)
public static WmtsCapabilities ReadCapabilities(XElement capabilitiesElement, string layer, string defaultUri)
{
var contentsElement = capabilitiesElement.Element(wmts + "Contents") ??
throw new ArgumentException("Contents element not found.");
@ -68,23 +68,15 @@ namespace MapControl
{
layerElement = contentsElement
.Elements(wmts + "Layer")
.FirstOrDefault(l => l.Element(ows + "Identifier")?.Value == layer);
if (layerElement == null)
{
.FirstOrDefault(l => l.Element(ows + "Identifier")?.Value == layer) ??
throw new ArgumentException($"Layer element \"{layer}\" not found.");
}
}
else
{
layerElement = contentsElement
.Elements(wmts + "Layer")
.FirstOrDefault();
if (layerElement == null)
{
.FirstOrDefault() ??
throw new ArgumentException("No Layer element found.");
}
layer = layerElement.Element(ows + "Identifier")?.Value ?? "";
}
@ -98,7 +90,7 @@ namespace MapControl
var style = styleElement?.Element(ows + "Identifier")?.Value ?? "";
var urlTemplate = ReadUrlTemplate(capabilitiesElement, layerElement, layer, style, defaultUrl);
var uriTemplate = ReadUriTemplate(capabilitiesElement, layerElement, layer, style, defaultUri);
var tileMatrixSetIds = layerElement
.Elements(wmts + "TileMatrixSetLink")
@ -120,16 +112,16 @@ namespace MapControl
return new WmtsCapabilities
{
Layer = layer,
UrlTemplate = urlTemplate,
UriTemplate = uriTemplate,
TileMatrixSets = tileMatrixSets
};
}
public static string ReadUrlTemplate(XElement capabilitiesElement, XElement layerElement, string layer, string style, string defaultUrl)
public static string ReadUriTemplate(XElement capabilitiesElement, XElement layerElement, string layer, string style, string defaultUri)
{
const string formatPng = "image/png";
const string formatJpg = "image/jpeg";
string urlTemplate = null;
string uriTemplate = null;
var resourceUrls = layerElement
.Elements(wmts + "ResourceURL")
@ -141,15 +133,15 @@ namespace MapControl
if (resourceUrls.Count != 0)
{
var urlTemplates = resourceUrls.Contains(formatPng) ? resourceUrls[formatPng]
var uriTemplates = resourceUrls.Contains(formatPng) ? resourceUrls[formatPng]
: resourceUrls.Contains(formatJpg) ? resourceUrls[formatJpg]
: resourceUrls.First();
urlTemplate = urlTemplates.First().Replace("{Style}", style);
uriTemplate = uriTemplates.First().Replace("{Style}", style);
}
else
{
urlTemplate = capabilitiesElement
uriTemplate = capabilitiesElement
.Elements(ows + "OperationsMetadata")
.Elements(ows + "Operation")
.Where(o => o.Attribute("name")?.Value == "GetTile")
@ -163,9 +155,9 @@ namespace MapControl
.Where(h => !string.IsNullOrEmpty(h))
.Select(h => h.Split('?')[0])
.FirstOrDefault() ??
defaultUrl;
defaultUri;
if (urlTemplate != null)
if (uriTemplate != null)
{
var formats = layerElement
.Elements(wmts + "Format")
@ -180,7 +172,7 @@ namespace MapControl
format = formatPng;
}
urlTemplate += "?Service=WMTS"
uriTemplate += "?Service=WMTS"
+ "&Request=GetTile"
+ "&Version=1.0.0"
+ "&Layer=" + layer
@ -193,12 +185,12 @@ namespace MapControl
}
}
if (string.IsNullOrEmpty(urlTemplate))
if (string.IsNullOrEmpty(uriTemplate))
{
throw new ArgumentException($"No ResourceURL element in Layer \"{layer}\" and no GetTile KVP Operation Metadata found.");
}
return urlTemplate;
return uriTemplate;
}
public static WmtsTileMatrixSet ReadTileMatrixSet(XElement tileMatrixSetElement)
@ -301,8 +293,12 @@ namespace MapControl
? new Point(MapProjection.Wgs84MeterPerDegree * top, MapProjection.Wgs84MeterPerDegree * left)
: new Point(left, top);
return new WmtsTileMatrix(
identifier, scaleDenominator, topLeft, tileWidth, tileHeight, matrixWidth, matrixHeight);
// See 07-057r7_Web_Map_Tile_Service_Standard.pdf, section 6.1.a, page 8:
// "standardized rendering pixel size" is 0.28 mm.
//
return new WmtsTileMatrix(identifier,
1d / (scaleDenominator * 0.00028),
topLeft, tileWidth, tileHeight, matrixWidth, matrixHeight);
}
}
}