Jim,
You are forgetting to create the graphic to add to the GraphicsLayer. You are trying to add the Polygon directly.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<title>Shapes and Symbols</title>
<link rel="stylesheet" href="https://js.arcgis.com/3.15/esri/css/esri.css">
<style>
html,
body,
#map{
padding: 0;
margin: 0;
height: 100%;
}
</style>
<script src="https://js.arcgis.com/3.15/"></script>
<script>
var map;
require([
"esri/map",
"esri/graphic",
"esri/geometry/Extent",
"esri/layers/FeatureLayer",
"esri/symbols/SimpleLineSymbol",
"esri/symbols/SimpleFillSymbol",
"esri/symbols/TextSymbol",
"esri/renderers/SimpleRenderer",
"esri/geometry/Polygon",
"esri/layers/GraphicsLayer",
"esri/layers/LabelClass",
"dojo/_base/Color",
"dojo/domReady!"
], function (Map, Graphic, Extent, FeatureLayer, SimpleLineSymbol, SimpleFillSymbol,
TextSymbol, SimpleRenderer, Polygon, GraphicsLayer, LabelClass, Color) {
map = new Map("map", {
showLabels: true, //very important that this must be set to true!
basemap: "streets",
center: [-79.746933, 40.446949],
zoom: 8
});
var graphicLayer = new GraphicsLayer();
var bCounty = new Polygon(loadBCounty());
var countyGraphic = new Graphic(bCounty, new SimpleFillSymbol(), {"Name": "Beaver"});
map.addLayer(graphicLayer);
graphicLayer.add(countyGraphic);
function loadBCounty() {
return [[-80.395815, 40.477370],
[-80.394242, 40.477313],
[-80.394242, 40.477313],
[-80.394050, 40.477306],
[-80.362057, 40.477539],
[-80.164173, 40.978097],
[-80.164226, 40.979473],
[-80.164877, 40.995214],
[-80.165292, 41.000474],
[-80.161159, 41.004532],
[-80.154676, 41.010891],
[-80.137160, 41.028076],
[-80.460466, 40.477488],
[-80.460466, 40.477488],
[-80.448980, 40.477701],
[-80.438175, 40.477783],
[-80.395815, 40.477370]];
}
});
</script>
</head>
<body>
<div id="map"></div>
</body>
</html>
