WMS Tile Layer Example

Artikkeli
05/22/2024

Note

Bing Maps Web Control SDK retirement

Bing Maps Web Control SDK is deprecated and will be retired. Free (Basic) account customers can continue to use Bing Maps Web Control SDK until June 30th, 2025. Enterprise account customers can continue to use Bing Maps Web Control SDK until June 30th, 2028. To avoid service disruptions, all implementations using Bing Maps Web Control SDK will need to be updated to use Azure Maps Web SDK by the retirement date that applies to your Bing Maps for Enterprise account type. For detailed migration guidance, see Migrate from Bing Maps Web Control SDK and Migrate Bing Maps Enterprise applications to Azure Maps with GitHub Copilot.

Azure Maps is Microsoft's next-generation maps and geospatial services for developers. Azure Maps has many of the same features as Bing Maps for Enterprise, and more. To get started with Azure Maps, create a free Azure subscription and an Azure Maps account. For more information about azure Maps, see Azure Maps Documentation. For migration guidance, see Bing Maps Migration Overview.

Web Mapping Services (WMS) is an Open Geospatial Consortium (OGC) standard for serving georeferenced map images. There are lots of data available in this format that can be overlaid on top of Bing Maps.

WMS services usually require that certain information is specified such as the image width, height, bounding box and coordinate system. When using a WMS service as a tile layer, the width and height can be set to 256, which is the size of the map tiles used in Bing Maps. Coordinate systems supported by a WMS service varies from service to service. One that works well with Bing Maps in many cases is CRS:84 which is for the WGS 84 projection system which is used by GPS devices. When using a WMS service as a tile layer, the bounding box information of each map tile is used to request an image. When creating the WMS URL “{bbox}“ can be used as a placeholder for the bounding box information. The tile layer in Bing Maps will automatically file this in as needed.

Note to be confused with the bounding box of the map tiles, WMS services usually publish the bounding box in which data is available. It is a good practice to specify this information when creating a tile layer as it will limit the tiles it requests to that area.

This example shows how to take the NOAA Base Reflective Weather Radar WMS service and display it as a tile layer on the map.

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <meta charset="utf-8" />
	<script type='text/javascript'>
        function GetMap() {
            var map = new Microsoft.Maps.Map('#myMap', {
                credentials: 'Your Bing Maps Key',
                center: new Microsoft.Maps.Location(40, -99),
                zoom: 4
            });

            var NOAAWeatherRadar = new Microsoft.Maps.TileLayer({
                mercator: new Microsoft.Maps.TileSource({
                    uriConstructor: 'http://idpgis.ncep.noaa.gov/arcgis/services/NWS_Observations/radar_base_reflectivity/MapServer/WmsServer?REQUEST=GetMap&SERVICE=WMS&VERSION=1.3.0&LAYERS=1&STYLES=default&FORMAT=image/png&TRANSPARENT=TRUE&CRS=CRS:84&BBOX={bbox}&WIDTH=256&HEIGHT=256',
                    minZoom: 3,
                    maxZoom: 10,
                    bounds: Microsoft.Maps.LocationRect.fromEdges(50.415613, -127.629361, 21.661516, -66.526907)
                })
            });

            map.layers.insert(NOAAWeatherRadar);
        }
    </script>
    <script type='text/javascript' src='http://www.bing.com/api/maps/mapcontrol?callback=GetMap' async defer></script>
</head>
<body>
    <div id="myMap" style="position:relative;width:600px;height:400px;"></div>
</body>
</html>

Running this code will display weather radar data over the USA.

Screenshot of a Bing map that shows weather radar data over the physical map of the United States of America.

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WMS Tile Layer Example

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