Hello Bjorn
Thanks for your answer.
Here is the sample code, which produces the error:
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<title>BasemapGallery widget - 4.10</title>
<link rel="stylesheet" href="https://js.arcgis.com/4.10/esri/css/main.css">
<style>
html,
body,
#viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
</style>
<script src="https://js.arcgis.com/4.10/"></script>
<script>
require([
"esri/Map",
"esri/Basemap",
"esri/views/MapView",
"esri/widgets/BasemapGallery",
"esri/widgets/BasemapGallery/support/LocalBasemapsSource",
"esri/layers/WMTSLayer"
], function(
Map, Basemap, MapView, BasemapGallery, LocalBasemapsSource, WMTSLayer
) {
var map = new Map();
var view = new MapView({
container: "viewDiv",
map: map
});
var mapBaseLayer2 = new WMTSLayer({
url: "https://gibs.earthdata.nasa.gov/wmts/epsg4326/best",
copyright: "<a target='_top' href='https://earthdata.nasa.gov'>Earthdata</a> by <a target='_top' href='https://www.nasa.gov'>NASA</a>",
activeLayer: {
id: "SRTM_Color_Index"
}
});
var mapBaseLayer1 = new WMTSLayer({
url: "https://gibs.earthdata.nasa.gov/wmts/epsg4326/best",
copyright: "<a target='_top' href='https://earthdata.nasa.gov'>Earthdata</a> by <a target='_top' href='https://www.nasa.gov'>NASA</a>",
activeLayer: {
id: "SRTM_Color_Index"
}
});
var stamen = new Basemap({
baseLayers: [ mapBaseLayer2 ],
title: "test2",
id: "test2",
thumbnailUrl: "icon"
});
var stamen1 = new Basemap({
baseLayers: [ mapBaseLayer1 ],
title: "test",
id: "test",
thumbnailUrl: "icon"
});
var basemapGallery = new BasemapGallery({
view: view,
source: [stamen, stamen1],
activeBasemap: stamen
});
view.ui.add(basemapGallery, {
position: "top-right"
});
});
</script>
</head>
<body>
<div id="viewDiv"></div>
</body>
</html>
I hope this helps, for reproducing the error. The basemaps in the sample code come from an esri sample. (ArcGIS API for JavaScript Sandbox )
regards
