WmsOverlay¶

Namespace: ThinkGeo.Core

Represents an overlay object that gets map images from the WMS server you specify.

public class WmsOverlay : TileOverlay, System.IDisposable, IWmsEntity

Inheritance Object → Overlay → TileOverlay → WmsOverlay
Implements IDisposable, IWmsEntity

Remarks:

The WmsOverlay gets images from one or more WMS servers that you specify. Usually, you add a WMS server URI to the ServerUris collection and the WmsOverlay will make a request to that WMS server to get its tile images.

You can also add multiple WMS server URIs to the ServerUris collection. The WmsOverlay will randomly send requests to those WMS servers in a concurrent fashion. This means that the tile images can come from different WMS servers, thus greatly enhancing performance. Do not add URIs of differently-configured WMS servers to the ServerUris collection.

Properties¶

Parameters¶

Gets a dictionary whose items will be passed to the WMS server as parameters.

public Dictionary<string, string> Parameters { get; }

Property Value¶

Dictionary<String, String>
A dictionary whose items will be passed to the WMS server as parameters.

IsTransparent¶

public bool IsTransparent { get; set; }

Property Value¶

Boolean

ServerUri¶

public Uri ServerUri { get; set; }

Property Value¶

Uri

Uri¶

Gets or Set a URI that specifies the location of the WMS server.

public Uri Uri { get; set; }

Property Value¶

Uri

Version¶

This property gets the version.

public string Version { get; }

Property Value¶

String

Exceptions¶

This property indicates the format in which the client wishes to be notified of service exceptions.

public string Exceptions { get; set; }

Property Value¶

String

Remarks:

Upon receiving a request that is invalid according to the OGC standard, the server shall issue a service exception report. The service report is meant to describe to the client application or its human user the reason(s) that the request is invalid.

CapabilitesCacheTimeout¶

public TimeSpan CapabilitesCacheTimeout { get; set; }

Property Value¶

TimeSpan

TimeoutInSecond¶

This property specifies the timeout of the web request in seconds. The default timeout value is 20 seconds.

public int TimeoutInSecond { get; set; }

Property Value¶

Int32

SpecificLayerBoundingBox¶

This property gets or sets whether return the specific layer's bounding box or not.

public bool SpecificLayerBoundingBox { get; set; }

Property Value¶

Boolean

ActiveLayerNames¶

This property represents the available layers that can be requested from the client and shown on the map.

public Collection<string> ActiveLayerNames { get; }

Property Value¶

Collection<String>

Remarks:

When requesting a map, a client may specify the layers to be shown on the map.

ActiveStyleNames¶

This property represents the available styles that can be requested from the client and shown on the map.

public Collection<string> ActiveStyleNames { get; }

Property Value¶

Collection<String>

Remarks:

When requesting a map, a client may specify the styles to be shown on the map.

OutputFormat¶

This property gets or sets the desired output format for the map requested from the WMS.

public string OutputFormat { get; set; }

Property Value¶

String

Remarks:

When requesting a map, a client may specify the output format in which to show the map. Format are specified as MIME types such as "image/gif" or "image/png".

WebProxy¶

This property gets or sets the proxy used for requesting a Web Response.

public IWebProxy WebProxy { get; set; }

Property Value¶

IWebProxy

UserAgent¶

public string UserAgent { get; set; }

Property Value¶

String

TimeoutInSeconds¶

Gets or sets the length of time, in seconds, before the request times out.

public int TimeoutInSeconds { get; set; }

Property Value¶

Int32

AxisOrder¶

This property specifies the order in which the coordinate axes are arranged when making requests to a Web Map Service (WMS) server. It is used to define the spatial reference system for the layer.

public WmsAxisOrder AxisOrder { get; set; }

Property Value¶

WmsAxisOrder

Projection¶

Gets or sets a string that will be sent to the WMS server to get the images in the specific projection. This property is the same as Crs.

public string Projection { get; set; }

Property Value¶

String
A string that represents the projection that the images use.

Credentials¶

This property gets or sets the base authentication interface for retrieving credentials for Web Client authentication.

public ICredentials Credentials { get; set; }

Property Value¶

ICredentials

Crs¶

This property gets or sets the projected or geographic coordinate reference system to be used.

public string Crs { get; set; }

Property Value¶

String

FastMode¶

This property gets or sets whether request and parse capabilities.

public bool FastMode { get; set; }

Property Value¶

Boolean

ImageFormat¶

Gets and sets drawing format for the tiles.

public RasterTileFormat ImageFormat { get; set; }

Property Value¶

RasterTileFormat

JpegQuality¶

Gets or sets the image quality when the TileImageFormat is Jpeg; otherwise this property has no effects. Its default value is 80.

public int JpegQuality { get; set; }

Property Value¶

Int32

IsCacheOnly¶

Gets or sets a value indicating whether this instance is cache only.

public bool IsCacheOnly { get; set; }

Property Value¶

Boolean
true if this instance is cache only; otherwise, false.

IsVisible¶

Gets or sets if this overlay is visible.

public bool IsVisible { get; set; }

Property Value¶

Boolean

DrawingQuality¶

public DrawingQuality DrawingQuality { get; set; }

Property Value¶

DrawingQuality

TileSizeMode¶

Gets or sets the tile size mode.

public TileSizeMode TileSizeMode { get; set; }

Property Value¶

TileSizeMode

        The tile size mode.

TileResolution¶

Gets or sets the tile resolution.

public TileResolution TileResolution { get; set; }

Property Value¶

TileResolution

        The tile resolution.

TileType¶

Gets and sets the overlay is formed by multiple tiles or single tile.

public TileType TileType { get; set; }

Property Value¶

TileType

TileWidth¶

Gets and sets the width of the tile.

public int TileWidth { get; set; }

Property Value¶

Int32

TileHeight¶

Gets and sets the height of the tile.

public int TileHeight { get; set; }

Property Value¶

Int32

TileCache¶

Gets and sets a tile cache object for saving the tiles.

public RasterTileCache TileCache { get; set; }

Property Value¶

RasterTileCache

TileSnappingMode¶

Gets or sets the tileView snapping mode.

public TileSnappingMode TileSnappingMode { get; set; }

Property Value¶

TileSnappingMode

TileBuffer¶

This property gets and sets the number of extra rows and colums of tiles on each side which will surround the minimum grid tiles to cover the map.

public int TileBuffer { get; set; }

Property Value¶

Int32

MaxExtent¶

This property gets or sets the max extent of matrix to calculate the tiles.

public RectangleShape MaxExtent { get; set; }

Property Value¶

RectangleShape

Remarks:

By default, MaxExtent is null; the matrix is created depending on the GeographyUnit of current map. When it's DecimalDegree, the matrix' is calculated as (-180, 90, 180, -90) as MaxExtent. While it's not DecimalDegree, the matrix is (-20037508.2314698, 20037508.2314698, 20037508.2314698, -20037508.2314698); It's allowed to modify it to customize the matrix.

WrappingMode¶

Thie property gets or sets whether allow wrap date line.

public WrappingMode WrappingMode { get; set; }

Property Value¶

WrappingMode

WrappingExtent¶

public RectangleShape WrappingExtent { get; set; }

Property Value¶

RectangleShape

CanRefreshRegion¶

public bool CanRefreshRegion { get; protected set; }

Property Value¶

Boolean

IsBase¶

public bool IsBase { get; set; }

Property Value¶

Boolean

Name¶

Gets or sets the name of this overaly.

public string Name { get; set; }

Property Value¶

String

MapArguments¶

Gets or sets current map information which will be used for calculating mechanism.

public MapArguments MapArguments { get; set; }

Property Value¶

MapArguments

OverlayCanvas¶

Gets or sets the actual canvas which maintains all the visual elements on the overlay.

public Canvas OverlayCanvas { get; set; }

Property Value¶

Canvas

DrawingExceptionMode¶

This property gets and sets the DrawingExceptionMode used when an exception occurs during drawing.

public DrawingExceptionMode DrawingExceptionMode { get; set; }

Property Value¶

DrawingExceptionMode

RefreshTypeOnResize¶

public OverlayRefreshType RefreshTypeOnResize { get; set; }

Property Value¶

OverlayRefreshType

Attribution¶

public string Attribution { get; set; }

Property Value¶

String

IsEmpty¶

This property gets if this overlay is empty or not.

public bool IsEmpty { get; }

Property Value¶

Boolean

Remarks:

This property enhances the performance of the overlay while drawing. If is true, we will skip drawing this overlay and continue drawing the next overlay.

AutoRefreshInterval¶

public TimeSpan AutoRefreshInterval { get; set; }

Property Value¶

TimeSpan

Constructors¶

WmsOverlay()¶

Constructore of WmsOverlay class.

public WmsOverlay()

WmsOverlay(Uri)¶

Constructore of WmsOverlay class.

public WmsOverlay(Uri uri)

Parameters¶

uri Uri
This parameter indicates a uri for the Wms server.

WmsOverlay(Uri, String, WmsAxisOrder)¶

This is the constructor the for the class.

public WmsOverlay(Uri uri, string crs, WmsAxisOrder axisOrder)

Parameters¶

uri Uri
URI of the WMS server.

crs String
the projected or geographic coordinate reference system to be used.

axisOrder WmsAxisOrder
the axis order of the layer

Remarks:

This constructor initializes a new wms overlay, then downloads and parses the service description. In an ASP.NET application, the service description is automatically cached for 24 hours when it is not specified.

WmsOverlay(Uri, String, WmsAxisOrder, String)¶

This is the constructor the for the class.

public WmsOverlay(Uri uri, string crs, WmsAxisOrder axisOrder, string version)

Parameters¶

uri Uri
URI of the WMS server.

crs String
The projected or geographic coordinate reference system to be used.

axisOrder WmsAxisOrder
The axis order of the overlay.

version String
The version of the WMS server.

Remarks:

This constructor initializes a new wms overlay with fast mode, it won't request and parse capabilities.

WmsOverlay(Uri, IWebProxy, String, WmsAxisOrder, String, Boolean)¶

Constructore of WmsOverlay class.

public WmsOverlay(Uri uri, IWebProxy webProxy, string crs, WmsAxisOrder axisOrder, string version, bool fastMode)

Parameters¶

uri Uri
URI of the WMS server.

webProxy IWebProxy
This parameter indicates the web proxy of the request

crs String
The projected or geographic coordinate reference system to be used.

axisOrder WmsAxisOrder
The axis order of the layer.

version String
The version of the WMS server, this only works when fastMode is true.

fastMode Boolean
Whether request and parse capabilities

Methods¶

OpenAsyncCore()¶

protected Task OpenAsyncCore()

Returns¶

Task

GetBoundingBoxCore()¶

protected RectangleShape GetBoundingBoxCore()

Returns¶

RectangleShape

GetServerLayers()¶

This method returns all layers at the server side.

public Collection<WmsServerLayer> GetServerLayers()

Returns¶

Collection<WmsServerLayer>
This method returns all layers at the server side.

Remarks:

None.

GetServerStyleNames()¶

This method returns the names of all styles at the server side.

public Collection<string> GetServerStyleNames()

Returns¶

Collection<String>
This method returns the names of all styles at the server side.

Remarks:

None.

GetServerOutputFormats()¶

This method returns the output format at the server side.

public Collection<string> GetServerOutputFormats()

Returns¶

Collection<String>
This method returns the output format at the server side.

Remarks:

None.

GetServerCrss()¶

This method returns the projected or geographic coordinate reference systems to be used.

public Collection<string> GetServerCrss()

Returns¶

Collection<String>

GetServerExceptionFormats()¶

This method returns the exception format at the server side.

public Collection<string> GetServerExceptionFormats()

Returns¶

Collection<String>
This method returns the exception format at the server side.

Remarks:

None.

GetServiceVersion()¶

This API gets the WMS server version of the service.

public string GetServiceVersion()

Returns¶

String
Returning a string reflecting the version of the service in WMS.

GetServerFeatureInfoFormats()¶

This API gets the WMS server FeatureInfo formats of the service.

public Collection<string> GetServerFeatureInfoFormats()

Returns¶

Collection<String>
This API returns the FeatureInfo formats supported on the server-side.

GetServerCapabilitiesXml()¶

This API gets the GetCapabilites document of the service.

public string GetServerCapabilitiesXml()

Returns¶

String
This API returns the GetCapabilites document of the service.

GetServiceBaseUrl()¶

This API gets the WMS base url of the service.

public string GetServiceBaseUrl()

Returns¶

String
Returns a string reflecting the WMS base url.

GetTileCore()¶

This method gets a specific tile object to form an overlay.

protected TileView GetTileCore()

Returns¶

TileView
A TileView object to form an overlay.

DrawTileAsyncCore(GeoCanvas, TileView)¶

This method redraws a tile by an extent and geography unit.

protected Task DrawTileAsyncCore(GeoCanvas geoCanvas, TileView tile)

Parameters¶

geoCanvas GeoCanvas

tile TileView
A tile which needs to be redrawn.

Returns¶

Task

SaveStateCore()¶

This method saves overlay state to a byte array.

protected Byte[] SaveStateCore()

Returns¶

Byte[]
A byte array indicates current overlay state.

LoadStateCore(Byte[])¶

This method restore the overlay state back from the specified state.

protected void LoadStateCore(Byte[] state)

Parameters¶

state Byte[]
This parameter indicates the state for restore the overlay.

OnSendingWebRequest(SendingWebRequestEventArgs)¶

protected void OnSendingWebRequest(SendingWebRequestEventArgs e)

Parameters¶

e SendingWebRequestEventArgs

OnSentWebRequest(SentWebRequestEventArgs)¶

protected void OnSentWebRequest(SentWebRequestEventArgs e)

Parameters¶

e SentWebRequestEventArgs

OnSendingHttpRequestMessage(SendingHttpRequestMessageEventArgs)¶

protected void OnSendingHttpRequestMessage(SendingHttpRequestMessageEventArgs e)

Parameters¶

e SendingHttpRequestMessageEventArgs

OnReceivedHttpResponseMessage(ReceivedHttpResponseMessageEventArgs)¶

protected void OnReceivedHttpResponseMessage(ReceivedHttpResponseMessageEventArgs e)

Parameters¶

e ReceivedHttpResponseMessageEventArgs

Events¶

SendingWebRequest¶

public event EventHandler<SendingWebRequestEventArgs> SendingWebRequest;

SentWebRequest¶

public event EventHandler<SentWebRequestEventArgs> SentWebRequest;

SendingHttpRequest¶

public event EventHandler<SendingHttpRequestMessageEventArgs> SendingHttpRequest;

ReceivedHttpResponse¶

public event EventHandler<ReceivedHttpResponseMessageEventArgs> ReceivedHttpResponse;

DrawTilesProgressChanged¶

This event raises when download progress is changed.

public event EventHandler<DrawTilesProgressChangedTileOverlayEventArgs> DrawTilesProgressChanged;

DrawingTile¶

This event raises before the tile is drawing.

public event EventHandler<DrawingTileTileOverlayEventArgs> DrawingTile;

DrawnTile¶

This event raises after the tile is drawn.

public event EventHandler<DrawnTileTileOverlayEventArgs> DrawnTile;

DrawingException¶

public event EventHandler<DrawingExceptionTileOverlayEventArgs> DrawingException;

DrawnException¶

public event EventHandler<DrawnExceptionTileOverlayEventArgs> DrawnException;

TileTypeChanged¶

public event EventHandler<TileTypeChangedTileOverlayEventArgs> TileTypeChanged;

TileTypeChanging¶

public event EventHandler<TileTypeChangingTileOverlayEventArgs> TileTypeChanging;

Drawing¶

This event raises before the overlay is drawing.

public event EventHandler<DrawingOverlayEventArgs> Drawing;

Drawn¶

This event raises after the overlay is drawn.

public event EventHandler<DrawnOverlayEventArgs> Drawn;

DrawingAttribution¶

public event EventHandler<DrawingAttributionOverlayEventArgs> DrawingAttribution;

DrawnAttribution¶

public event EventHandler<DrawnAttributionOverlayEventArgs> DrawnAttribution;

ThrowingException¶

public event EventHandler<ThrowingExceptionOverlayEventArgs> ThrowingException;