ClemensFischer/XAML-Map-Control
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Version 4.16.0. Improved MapProjection.

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ClemensF 2019-12-12 19:23:41 +01:00
parent 60e0093785
commit 12566506f8
14 changed files with 136 additions and 121 deletions
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61
MapControl/Shared/WmsImageLayer.cs
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@ -7,7 +7,6 @@ using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using System.Globalization;
using System.Xml.Linq;
#if WINDOWS_UWP
using Windows.Foundation;
@ -65,17 +64,17 @@ namespace MapControl
/// <summary>
/// Gets a list of all layer names returned by a GetCapabilities response.
/// </summary>
public async Task<IList<string>> GetLayerNamesAsync()
public async Task<List<string>> GetLayerNamesAsync()
{
IList<string> layerNames = null;
List<string> layerNames = null;
if (ServiceUri != null)
{
var capabilitiesUri = GetRequestUri("GetCapabilities").Replace(" ", "%20");
var uri = GetRequestUri("GetCapabilities").Replace(" ", "%20");
try
{
var stream = await ImageLoader.HttpClient.GetStreamAsync(capabilitiesUri);
var stream = await ImageLoader.HttpClient.GetStreamAsync(uri);
var capabilities = XDocument.Load(stream).Root;
var ns = capabilities.Name.Namespace;
@ -88,31 +87,36 @@ namespace MapControl
}
catch (Exception ex)
{
Debug.WriteLine("WmsImageLayer: {0}: {1}", capabilitiesUri, ex.Message);
Debug.WriteLine("WmsImageLayer: {0}: {1}", uri, ex.Message);
}
}
return layerNames;
}
/// <summary>
/// Calls GetImageUri() and asynchronously loads an ImageSource from the returned GetMap URL.
/// </summary>
protected override async Task<ImageSource> GetImageAsync()
{
var uri = GetImageUri();
return uri != null ? await ImageLoader.LoadImageAsync(uri) : null;
return uri != null
? await ImageLoader.LoadImageAsync(new Uri(uri.Replace(" ", "%20")))
: null;
}
/// <summary>
/// Returns a GetMap request URL for the current BoundingBox.
/// Returns a GetMap request URL string.
/// </summary>
protected virtual Uri GetImageUri()
protected virtual string GetImageUri()
{
Uri imageUri = null;
string uri = null;
var projection = ParentMap?.MapProjection;
if (ServiceUri != null && projection != null && !string.IsNullOrEmpty(projection.CrsId))
{
var uri = GetRequestUri("GetMap");
uri = GetRequestUri("GetMap");
if (uri.IndexOf("LAYERS=", StringComparison.OrdinalIgnoreCase) < 0 && Layers != null)
{
@ -131,42 +135,13 @@ namespace MapControl
var rect = projection.BoundingBoxToRect(BoundingBox);
uri += "&" + GetCrsParam(projection);
uri += "&" + GetBboxParam(projection, rect);
uri += "&CRS=" + projection.GetCrsValue();
uri += "&BBOX=" + projection.GetBboxValue(rect);
uri += "&WIDTH=" + (int)Math.Round(projection.ViewportScale * rect.Width);
uri += "&HEIGHT=" + (int)Math.Round(projection.ViewportScale * rect.Height);
imageUri = new Uri(uri.Replace(" ", "%20"));
}
return imageUri;
}
/// <summary>
/// Gets the effective value of the CRS query parameter.
/// </summary>
/// <returns></returns>
protected virtual string GetCrsParam(MapProjection projection)
{
var crs = "CRS=" + projection.CrsId;
if (projection.CrsId.StartsWith("AUTO2:"))
{
crs += string.Format(CultureInfo.InvariantCulture, ",1,{0},{1}",
projection.ProjectionCenter.Longitude, projection.ProjectionCenter.Latitude);
}
return crs;
}
/// <summary>
/// Gets the effective value of the BBOX (or some equivalent) query parameter.
/// </summary>
protected virtual string GetBboxParam(MapProjection projection, Rect bbox)
{
return string.Format(CultureInfo.InvariantCulture,
projection.HasLatLonBoundingBox ? "BBOX={1},{0},{3},{2}" : "BBOX={0},{1},{2},{3}",
bbox.X, bbox.Y, (bbox.X + bbox.Width), (bbox.Y + bbox.Height));
return uri;
}
private string GetRequestUri(string request)