topic Query Task Fails Unless I pass in exact coordinates... in ArcGIS JavaScript Maps SDK Questions

Query Task Fails Unless I pass in exact coordinates...

GISAdmin1 — Tue, 01 Feb 2011 18:18:13 GMT

Hi there,

I have a simple query task defined for a point layer. When I override the xy returned from the map with the exact coordinates of the feature, the task works. Otherwise, no features are identified. Is there a tolerance parameter I can apply?


function executeQueryTask(evt) {
      
         query.geometry = evt.mapPoint;
                //alert (evt.mapPoint.x + " - " + evt.mapPoint.y )
        evt.mapPoint.x= 511704.446;
        evt.mapPoint.y = 5437075.128;
  queryTask.execute(query, showResults);
 
}

Re: Query Task Fails Unless I pass in exact coordinates...

KellyHutchins — Wed, 02 Feb 2011 01:08:28 GMT

The identify task allows you to specify a tolerance but the query task does not.

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

If you want to use the query task to query points you'll have to generate a tolerance. This blog post has some sample code that does this:

http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/01/15/Querying-points-and-lines-on-click-with-the-ArcGIS-JavaScript-API.aspx