ArcGISDynamicMapLayer disappears

AlexShiplett — Tue, 17 Aug 2010 18:21:38 GMT

I am trying to integrate the Javascript sample for the locator, with our ArcGIS server. I've been successful, to a point.

I've replaced the TileLayer from that sample with a dynamic layer. Now, whenever I click on the locate button, the points appear, but the map disappears.

Everything else appears to work correctly.

Here is the code:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <meta http-equiv="X-UA-Compatible" content="IE=7" />
    <title>Find Address</title>
    <link rel="stylesheet" type="text/css" href="http://serverapi.arcgisonline.com/jsapi/arcgis/2.0/js/dojo/dijit/themes/tundra/tundra.css">
    <script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=2.0"></script>
    <script type="text/javascript">
        dojo.require("esri.map");
        dojo.require("esri.tasks.locator");

        var locator, initExtent;
        var layer, map, visible = [];

        function init() {
            initExtent = new esri.geometry.Extent({ "xmin": 2315314.74138065, "ymin": 137872.200380653, "xmax": 2365752.73138066, "ymax": 189933.162380651, "spatialReference": { "wkid": 2264} });
            map = new esri.Map("map", { extent: initExtent });
            dojo.connect(map, "onExtentChange", showExtent);
             locator = new esri.tasks.Locator("http://it-gis2.wilmingtonnc.gov/ArcGIS/rest/services/Wilmington/AddrPointsCenterlineComposite/GeocodeServer");
             dojo.connect(locator, "onAddressToLocationsComplete", showResults);
            layer = new esri.layers.ArcGISDynamicMapServiceLayer("http://it-gis2.wilmingtonnc.gov/ArcGIS/rest/services/Wilmington/general/MapServer", { disableClientCaching: false });

            visible = [20, 19, 16, 12, 11, 10, 6, 4];
            layer.setVisibleLayers(visible);
            map.addLayer(layer);
          
        }

        function buildLayerList(layer) {
            var infos = layer.layerInfos, info;
            /*var items = [];
            for (var i = 0, il = infos.length; i < il; i++) {
                info = infos;
                if (info.defaultVisibility) {
                    visible.push(info.id);
                }
                items = "<input type='checkbox' class='list_item' checked='" + (info.defaultVisibility ? "checked" : "") + "' id='" + info.id + "' onclick='updateLayerVisibility();' /><label for='" + info.id + "'>" + info.name + "</label>";
            }
            dojo.byId("layer_list").innerHTML = items.join();*/
            visible = [20, 19, 16, 12, 11, 10, 6, 5, 4];
            layer.setVisibleLayers(visible);
            map.addLayer(layer);
        }

        function updateLayerVisibility() {
            var inputs = dojo.query(".list_item"), input;
            visible = [];
            for (var i = 0, il = inputs.length; i < il; i++) {
                if (inputs.checked) {
                    visible.push(inputs.id);
                }
            }
            layer.setVisibleLayers(visible);
        }

        function locate() {
            map.graphics.clear();
            var add = dojo.byId("address").value
            var address = {
                street: add
            };
            locator.addressToLocations(address, ["Loc_name"]);

        }

        function showExtent(extent) {
            var s = "";
            s = "XMin: " + extent.xmin.toFixed(2) + " "
           + "YMin: " + extent.ymin.toFixed(2) + " "
           + "XMax: " + extent.xmax.toFixed(2) + " "
           + "YMax: " + extent.ymax.toFixed(2);
            dojo.byId("extents").innerHTML = s;

        }

        function showResults(candidates) {
            var candidate;
            var symbol = new esri.symbol.SimpleMarkerSymbol();
            var infoTemplate = new esri.InfoTemplate("Location", "Address: ${address}<br />Score: ${score}<br />Source locator: ${locatorName}");

            symbol.setStyle(esri.symbol.SimpleMarkerSymbol.STYLE_CIRCLE);
            symbol.setColor(new dojo.Color([255, 0, 0, 0.75]));

            var points = new esri.geometry.Multipoint(map.spatialReference);

            for (var i = 0, il = candidates.length; i < il; i++) {
                candidate = candidates;
                if (candidate.score > 70) {
                    var attributes = { address: candidate.address, score: candidate.score, locatorName: candidate.attributes.Loc_name };
                    var geom = esri.geometry.geographicToWebMercator(candidate.location);
                    var graphic = new esri.Graphic(geom, symbol, attributes, infoTemplate);
                    map.graphics.add(graphic);
                    map.graphics.add(new esri.Graphic(geom, new esri.symbol.TextSymbol(attributes.address).setOffset(0, 8)));
                    points.addPoint(geom);
                }
            }
            map.setExtent(points.getExtent().expand(2));
            
        }

        dojo.addOnLoad(init);
    </script>
  </head>
  <body class="tundra">
    Address : <input type="text" id="address" size="60" value="305 chestnut st, wilmington, nc 28401" /> <i>(Address, City, State, Zip)</i>
    <input type="button" value="Locate" onclick="locate()" /><br />
    Layer List : <span id="layer_list"></span><br />
    <br />
    <div id="map" style="width:600px; height:500px; border:1px solid #000;"></div>
    <div id="extents"></div>
  </body>
</html>

Any assistance is appreciated!
Thanks,
Alex

Re: ArcGISDynamicMapLayer disappears

KellyHutchins — Sat, 11 Dec 2021 17:48:53 GMT

Alex,

Not sure if this is the issue but it's something to check out. In the showResults function the address candidates returned by the locater are converted from geographic to Web Mercator. However it looks like your map is using wkid 2264 not Web Mercator.

  
var geom = esri.geometry.geographicToWebMercator(candidate.location);
var graphic = new esri.Graphic(geom, symbol, attributes, infoTemplate);

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Re: ArcGISDynamicMapLayer disappears