topic Re: Failed to load layer - Ordnance Survey API in ArcGIS Online Questions

Failed to load layer - Ordnance Survey API

Vani — Fri, 13 Dec 2024 12:41:47 GMT

Hi,

I am trying to implement ARC GIS maps with Ordnance survey base map by calling API using API key. I am calling the Ordnance survey API throw WMTSLayer function. However I get error as below:

4.31/:132 [esri.layers.WMTSLayer] #load() Failed to load layer (title: 'Layer', id:

Would like to know what is causing this error.

Below is the code I am testing.

<head>

<title>WMTS Layer with Ordnance Survey</title>

<style>

html, body, #viewDiv {

height: 100%;

margin: 0;

padding: 0;

}

</style>

</head>

<body>

require([

"esri/Map",

"esri/views/MapView",

"esri/layers/WMTSLayer"

], function(Map, MapView, WMTSLayer) {

// Define the WMTS layer using the OS API

const wmtsLayer = new WMTSLayer({

url: "https://api.os.uk/maps/wmts/v1?key=API_KEY",

activeLayer: "OS Outdoor 27700",

tileMatrixSet: "BritishNationalGrid",

spatialReference: {

wkid: 27700 // EPSG:27700

}

});

// Create a map and add the WMTS layer

const map = new Map({

basemap: {

baseLayers: [wmtsLayer]

}

});

// Create a MapView for the map

const view = new MapView({

container: "viewDiv", // Div element id

map: map,

center: [400000, 400000],

zoom: 10,

spatialReference: {

wkid: 27700

}

});

</script>

</body>

</html>

Re: Failed to load layer - Ordnance Survey API

David_McRitchie — Wed, 18 Dec 2024 12:51:19 GMT

Hey Vani,

For this since there is a key within the WMTS you won't be able to put this in with the WTMS URL request, instead you will need to add the key as a Custom Parameter.

For example

const wmtsLayer = new WMTSLayer({ url: "https://api.os.uk/maps/raster/v1/wmts", customParameters: { key: "xxxxxxxxxxxxxxxxxxxxxxxxxxx" }, activeLayer: "OS Outdoor 27700", tileMatrixSet: "BritishNationalGrid", spatialReference: { wkid: 27700 // EPSG:27700 } });

I would also check the URL you are using for the WMTS.

Hope that helps!

David

Re: Failed to load layer - Ordnance Survey API

LouisJohnston — Wed, 16 Apr 2025 10:25:38 GMT

Hi - I have been having an awful time uploading a WMTS feed from OS onto Arcgis online. THANK you for this! Using the key as a separate attribute works!