topic Re: how to set spatial filter for a featurelayer in ArcGIS JavaScript Maps SDK Questions

how to set spatial filter for a featurelayer

RaviKonaparthi — Mon, 26 Apr 2010 16:08:24 GMT

Hi,

I am able to set spatial filters by providing input geometry and spatial relationship to a FeatureLayer in snapshot mode in silverlight api. How do i do this in JSAPI 2.0? The feature layer doesnt have any geometry property. Is there an elegant way of achieving this by some other means?

regards
Ravi

how to set spatial filter for a featurelayer

KellyHutchins — Mon, 26 Apr 2010 17:05:50 GMT

Ravi,

You can use the queryFeatures method to query the feature layer using a spatial filter. The queryFeatures method takes in input query that has a geometry property you can use to define the filter geometry.

http://help.arcgis.com/EN/webapi/javascript/arcgis/help/jsapi_start.htm#jsapi/query.htm

how to set spatial filter for a featurelayer

RaviKonaparthi — Tue, 27 Apr 2010 13:35:46 GMT

Hi kelly, thanks for the input.

I am actually looking for an equivalent of spatial filter (geometry) functionality provided in flex and silverlight api for a FeatureLayer. If I use queryFeatures method to query the feature layer, then I have to deal with results.

This is not so for a featureLayer in silverlight and flex api where I can set the geometry and spatialrelationship and it works!. Its pretty straightforward there.

I have noticed that jsapi 2.0 provides a datalayer class (esri.tasks.DataLayer) which has geometry and spatialrelationship property. But I am unable to get it to work and couldnt find any sample which uses a datalayer.

regards
Ravi

how to set spatial filter for a featurelayer

KellyHutchins — Fri, 10 Dec 2021 21:00:02 GMT

Ravi,
We don't have a method directly on the feature layer to apply a spatial filter - I don't see one in Flex either. However if you want to apply a spatial query directly to the feature layer one approach would be to add a feature layer in selection mode then use selectFeatures to perform a spatial query. Here's a sample that shows how this works, here only features within the specified extent are drawn on the map.

  <!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"/> 
    <title>FeatureLayer On Demand</title> 
    <script type="text/javascript">djConfig = { parseOnLoad:true };</script> 
    <script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=2.0"></script> 
    <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"> 
      dojo.require("esri.map");
      dojo.require("esri.layers.FeatureLayer");
      dojo.require("dijit.form.Button");
      dojo.require("dijit.Dialog");

      var mapLayers = [];  //array of layers in client map
      var map;
      function init() {
        var extent = new esri.geometry.Extent({"xmin":-13337231.937022427,"ymin":3914529.1302062804,"xmax":-12909184.578625461,"ymax":4220277.2433469705,"spatialReference":{"wkid":102100}});
        map = new esri.Map("map", { extent:extent});
        dojo.connect(map, "onLoad", initOperationalLayer);

        var imagery = new esri.layers.ArcGISTiledMapServiceLayer("http://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer");
        map.addLayer(imagery);

      }

      function initOperationalLayer(map) {
      

        var featureLayer = new esri.layers.FeatureLayer("http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Earthquakes/Since_1970/MapServer/0",{
          mode: esri.layers.FeatureLayer.MODE_SELECTION,
          outFields: ["*"]
        });
        map.addLayer(featureLayer);
        var extent = new esri.geometry.Extent({"xmin":-13228997.10497058,"ymin":3961002.843403707,"xmax":-13014973.425772188,"ymax":4113876.899973986,"spatialReference":{"wkid":102100}});
        var query = new esri.tasks.Query();
        query.geometry = extent;
        featureLayer.selectFeatures(query,esri.layers.FeatureLayer.SELECTION_NEW);

      }



      dojo.addOnLoad(init);
    </script> 
  </head> 
  <body class="tundra"> 
    <div style="position:relative;"> 
      <div id="map" style="width:700px; height:500px; border:1px solid #000;"></div> 
   
    </div> 
  </body> 
</html>

how to set spatial filter for a featurelayer

RaviKonaparthi — Thu, 29 Apr 2010 13:35:03 GMT

Hi Kelly,

I have tried the following code and it was working fine in my scenario. But when i buffer a point for a radius of 10 KM using geometry service and pass the resultant polygon (in my case a circle) to the query filter it doesn't filter. But the same polygon if i convert to extent it works fine. Any idea why this behavior is?

Regards,
Ravi.

Re: how to set spatial filter for a featurelayer

BenStuder — Fri, 13 Aug 2010 16:47:44 GMT

Hi Kelly,

I have tried the following code and it was working fine in my scenario. But when i buffer a point for a radius of 10 KM using geometry service and pass the resultant polygon (in my case a circle) to the query filter it doesn't filter. But the same polygon if i convert to extent it works fine. Any idea why this behavior is?

Regards,
Ravi.

Ravi, did you set up a proxy server and reference it in your code?
http://resources.esri.com/help/9.3/ArcGISServer/apis/javascript/arcgis/help/jshelp_start.htm#jshelp/ags_proxy.htm

Any querystring longer than 2000 characters just won't work due to Web browser limitations.

Re: how to set spatial filter for a featurelayer

RaviKonaparthi — Sat, 14 Aug 2010 03:28:22 GMT

Ben,

I am using proxy file for this functionality and i have fixed my issue, now i am able to apply spatial filter on a feature layer.

Thank you,
Ravi.

Re: how to set spatial filter for a featurelayer

AlessioDi_Lorenzo — Wed, 22 Sep 2010 08:06:09 GMT

Ben,
I am using proxy file for this functionality and i have fixed my issue, now i am able to apply spatial filter on a feature layer.

Ravi, I'll really appreciate if you would explain your solution.

I'm going to port my apps to arcgis 10 and js apis 2.1 and I need a way to use spatial filters and obtain a server-side rendering; if understood correctly this solution could work also for me.

thx

Re: how to set spatial filter for a featurelayer

JulianoKersting — Fri, 03 Jun 2011 18:21:02 GMT

I have noticed that jsapi 2.0 provides a datalayer class (esri.tasks.DataLayer) which has geometry and spatialrelationship property. But I am unable to get it to work and couldnt find any sample which uses a datalayer.
Ravi

Yeah I am trying to use DataLayer as well but could not find any code samples using this.

Did you find Anything?

Re: how to set spatial filter for a featurelayer

HamidMokdes — Thu, 06 Oct 2011 17:09:39 GMT

Hi,

I am able to set spatial filters by providing input geometry and spatial relationship to a FeatureLayer in snapshot mode in silverlight api. How do i do this in JSAPI 2.0? The feature layer doesnt have any geometry property. Is there an elegant way of achieving this by some other means?

regards
Ravi

Hi;

There is no spatialRelationship property exposed through FeatureLayer object. How did you set that in silverlight ? I can only see the Geometry property .

Thanks,