nowCOAST Map Services

WendiYoung · ‎12-12-2016

I am using the nowCOAST Map Server to display the recent Weather Radar image. nowcoast/radar_meteo_imagery_nexrad_time (MapServer) I'm having trouble with adding the corresponding Legend?

RobertScheitlin__GISP · ‎12-12-2016

Wendi,

Here is a sample using 4.1:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
  <title>View padding - 4.1</title>
  <style>
    html,
    body,
    #viewDiv {
      padding: 0;
      margin: 0;
      height: 100%;
      width: 100%;
    }

    #sidebar {
      z-index: 99;
      position: absolute;
      top: 0;
      right: 0;
      height: 100%;
      background: rgba(0, 0, 0, 0.5);
      width: 320px;
      overflow-y: auto;
    }

    #text {
      color: white;
      padding: 3%;
    }

    .esri-legend.esri-widget {
      background-color: rgba(255,255,255,0);
    }
  </style>
  <link rel="stylesheet" href="https://js.arcgis.com/4.1/esri/css/main.css">
  <script src="https://js.arcgis.com/4.1/"></script>
  <script>
    require([
      "esri/Map",
      "esri/views/MapView",
      "esri/widgets/Legend",
      "dojo/dom",
      "esri/layers/MapImageLayer",
      "esri/renderers/SimpleRenderer",
      "esri/symbols/SimpleLineSymbol",
      "dojo/domReady!"
    ], function(
      Map,
      MapView,
      Legend,
      dom,
      MapImageLayer,
      SimpleRenderer,
      SimpleLineSymbol
    ) {

      var renderer = new SimpleRenderer({
        symbol: new SimpleLineSymbol({
          color: [255, 255, 255, 0.5],
          width: 0.75,
          style: "long-dash-dot-dot"
        })
      });

      var layer = new MapImageLayer({
        url: "https://nowcoast.noaa.gov/arcgis/rest/services/nowcoast/radar_meteo_imagery_nexrad_time/MapServer"
      });

      // Create the Map
      var map = new Map({
        basemap: "topo",
        layers: [layer]
      });

      // Create the view set the view padding to be 320 px from the right
      var view = new MapView({
        container: "viewDiv",
        map: map,
        center: [-74.045459, 40.690083], // Liberty Island, NY, USA
        zoom: 16,
        padding: {
          right: 320 // Same value as the #sidebar width in CSS
        }
      });

      view.then(function() {
          var legend = new Legend({
            view: view,
            layerInfos: [{
              layer: layer,
              title: "nowcoast/radar meteo imagery nexrad time"
            }]
          }, "text");
        });

    });
  </script>
</head>

<body>
  <div id="viewDiv">
    <div id="sidebar">
      <div id="text">
      </div>
    </div>
  </div>
</body>
</html>
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WendiYoung · ‎12-12-2016

Thank you Robert! I am using 3.9 but will look into updating to 4.1. Also, I was using "DynamicMapServiceLayer" which probably isn't necessary.

RobertScheitlin__GISP · ‎12-12-2016

Wendi,

It is hard to guess now a days which version people are using. Here is a sample for 3.18 then:

<!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>Map with legend</title>

  <link rel="stylesheet" href="https://js.arcgis.com/3.18/dijit/themes/claro/claro.css">
  <link rel="stylesheet" href="https://js.arcgis.com/3.18/esri/css/esri.css">

  <style>
    html, body {
      height: 97%;
      width: 98%;
      margin: 1%;
    }

    #rightPane {
      width: 20%;
    }

    #legendPane {
      border: solid #97DCF2 1px;
    }
  </style>

  <script src="https://js.arcgis.com/3.18/"></script>
  <script>
    var map;
    require([
      "esri/map", "esri/layers/ArcGISDynamicMapServiceLayer", "esri/dijit/Legend",
      "dojo/_base/array", "dojo/parser",
      "dijit/layout/BorderContainer", "dijit/layout/ContentPane",
      "dijit/layout/AccordionContainer", "dojo/domReady!"
    ], function(
      Map, ArcGISDynamicMapServiceLayer, Legend,
      arrayUtils, parser
    ) {
      parser.parse();

      map = new Map("map", {
        basemap:"topo",
        center: [-96.53, 38.374],
        zoom: 4
      });

      var radar = new ArcGISDynamicMapServiceLayer("https://nowcoast.noaa.gov/arcgis/rest/services/nowcoast/radar_meteo_imagery_nexrad_time/MapServer");

      //add the legend
      map.on("layers-add-result", function (evt) {
        var layerInfo = arrayUtils.map(evt.layers, function (layer, index) {
          return {layer:layer.layer, title:layer.layer.name};
        });
        if (layerInfo.length > 0) {
          var legendDijit = new Legend({
            map: map,
            layerInfos: layerInfo
          }, "legendDiv");
          legendDijit.startup();
        }
      });

      map.addLayers([radar]);
    });
  </script>
</head>

<body class="claro">
<div id="content"
     data-dojo-type="dijit/layout/BorderContainer"
     data-dojo-props="design:'headline', gutters:true"
     style="width: 100%; height: 100%; margin: 0;">

  <div id="rightPane"
       data-dojo-type="dijit/layout/ContentPane"
       data-dojo-props="region:'right'">

    <div data-dojo-type="dijit/layout/AccordionContainer">
      <div data-dojo-type="dijit/layout/ContentPane" id="legendPane"
           data-dojo-props="title:'Legend', selected:true">
        <div id="legendDiv"></div>
      </div>
      <div data-dojo-type="dijit/layout/ContentPane"
           data-dojo-props="title:'Pane 2'">
        This pane could contain tools or additional content
      </div>
    </div>
  </div>
  <div id="map"
       data-dojo-type="dijit/layout/ContentPane"
       data-dojo-props="region:'center'"
       style="overflow:hidden;">
  </div>
</div>
</body>

</html>
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RobertScheitlin__GISP · ‎12-12-2016

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