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Level of details (LOD) for dynamic layer

SunilPalkar

Hi

I am working on Dynamic layers and I want to make similar example @ http://help.arcgis.com/en/webapi/javascript/arcgis/samples/map_switch_layer_on_zoom/index.html

I know its possible in Tiled map service but I am using ArcGIS Online (as base map) and two dynamic services on top of ArcGIS Online and in API reference (3.0) its not mentioned so any help will be great !!

Thank you..

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Accepted answers

SunilPalkar

Thanks for your reply..I am working on your idea..

Also I think that I can set zoom levels in desktop itself (BCoz those .mxd's are available in Desktop 10.0) so let you know soon something good : )

Hi,

EDIT: I think that is better to use the property setMinScale(scale) and setMaxScale(scale) for your Dynamic layers. This methods are avaiable from 3.1

All comments

DavideLimosani

Hi,

EDIT: I think that is better to use the property setMinScale(scale) and setMaxScale(scale) for your Dynamic layers. This methods are avaiable from 3.1

SunilPalkar

Thanks for your reply..I am working on your idea..

Also I think that I can set zoom levels in desktop itself (BCoz those .mxd's are available in Desktop 10.0) so let you know soon something good : )

Hi,

EDIT: I think that is better to use the property setMinScale(scale) and setMaxScale(scale) for your Dynamic layers. This methods are avaiable from 3.1

SunilPalkar

Hello,

I tried 1st in ArcMap (Save msd file with custom zoom) and updated existing service still its not working..

Tried 2nd way : inserted the properties in as per mention in API (3.2) doc.

Here is the code

var dynamicMapServiceLayer1 = new esri.layers.ArcGISDynamicMapServiceLayer("http://my server:6080/arcgis/rest/services/layer11/MapServer",{"opacity":0.25});


         dynamicMapServiceLayer1.setVisibleLayers([0,1]);
          dynamicMapServiceLayer1.maxScale = 3000.988; // confirmed this scale in RESET api
          dynamicMapServiceLayer1.minScale = 1.479;   // confirmed this scale in RESET api


        map.addLayer(dynamicMapServiceLayer1);

Any more workaround will great !!

thanks in advance..

SunilPalkar

Hi All,

I have one question regarding dynamic layer that

what is the exact scale of particular dynamic service ?

>> because I check the REST service for details its showing different value and I tried using

 var currentScale = map.getScale();
  console.log('Scale: ' + currentScale);

its showing different scale.

>>After that I have used the following code

var dynamicLayerInfo = new esri.layers.DynamicLayerInfo({
        "defaultVisibility":true,
        "id":0,"maxScale":1000000,
        "minScale":0,
        "parentLayerId":-1
});

its showing some different value.

As per mention the API doc.

How should I proceed ? I want to apply LOD for dynamic layer

SunilPalkar

Hello All,

I followed following post and its resolved : )

Thanks every one and Kelly H & Derek.

<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=7,IE=9" />
    <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no"/>
    <title></title>
    <link rel="stylesheet" type="text/css" href="http://serverapi.arcgisonline.com/jsapi/arcgis/3.1/js/dojo/dijit/themes/tundra/tundra.css" />
    <style>
      html, body { height: 100%; width: 100%; margin: 0; padding: 0; }
      h3 { margin: 0 0 5px 0; border-bottom: 1px solid #444; text-align: center }
      .shadow {
        -moz-box-shadow: 0 0 5px #888;
        -webkit-box-shadow: 0 0 5px #888;
        box-shadow: 0 0 5px #888;
      }
      #map{ margin: 0; padding: 0; }
      #feedback {
        background: #fff;
        color: #444;
        position: absolute;
        font-family: arial;
        height: 40px;
        left: 30px;
        margin: 5px;
        padding: 10px;
        bottom: 30px;
        text-align: center;
        width: 320px;
        z-index: 40;
      }
      .note { font-size: 80%; padding: 0 0 10px 0; }
      #slider {
        color: #666;
        margin: 5px auto;
        padding: 3px;
      }
      #appSliderLabel { padding: 0 0 10px 0; }
      #maxLabel { display: inline-block; margin: 0 0 0 -30px;}
      #minLabel { display: inline-block; margin: 0 0 0 30px;}
      #breakInfo { padding: 20px 0 0 0; }

    </style>
    <script>var dojoConfig = { parseOnLoad: true };</script>
    <script src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=3.1"></script>
    <script>
      dojo.require("dijit.layout.BorderContainer");
      dojo.require("dijit.layout.ContentPane");
      dojo.require("esri.map");

      // one global for persistent app variables
      var app = {};

      function init() {
        var ext, basemap, usaUrl;
        ext = new esri.geometry.Extent({"xmin":-14332474,"ymin":3248843,"xmax":-8070752,"ymax":5464906,"spatialReference":{"wkid":102100}});

        app.map = new esri.Map("map", {
          "extent": ext,
          "slider": false
        });
        dojo.connect(app.map, "onLoad", function() {
          dojo.connect(dijit.byId("map"), "resize", app.map, app.map.resize);
          dojo.connect(app.map, "onZoomEnd", updateScale);
          updateScale();
        });

        basemap = new esri.layers.ArcGISTiledMapServiceLayer("http://services.arcgisonline.com/ArcGIS/rest/services/Ocean_Basemap/MapServer");
        app.map.addLayer(basemap);

        // set up a layer to show counties as a dynamic map service
        // set visible layers to [2]
        usaUrl = "http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer";
        app.usaLayer = new esri.layers.ArcGISDynamicMapServiceLayer(usaUrl, {
          "id": "usa",
          "opacity": 0.7
        });
        dojo.connect(app.usaLayer, "onLoad", function() {
          app.usaLayer.setVisibleLayers([2]);
          app.usaLayer.maxScale = 10000000;
          app.usaLayer.minScale = 20000000;
          // console.log("set dyn layer infos...", infos);
        });
        app.map.addLayer(app.usaLayer);
      }

      function updateScale() {
        dojo.byId("map-scale").innerHTML = dojo.number.format(parseInt(app.map.getScale()));
      }

      function errorHandler(err) {
        console.log('Oops, error: ', err);
      }

      dojo.ready(init);
    </script>
</head>

<body class="tundra">
    <div data-dojo-type="dijit.layout.BorderContainer"
         data-dojo-props="design:'headline',gutters:false"
         style="width: 100%; height: 100%; margin: 0;">
      <div id="map"
           data-dojo-type="dijit.layout.ContentPane"
           data-dojo-props="region:'center'">

        <div id="feedback" class="shadow">
          Map scale: <span id="map-scale">unknown</span>
        </div>
      </div>
    </div>
</body>
</html>

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