Latest Contributions by DavidElies

Hello, I have a map service with many layers including 2 raster layers.  I've noticed that REST requests return no Display Field for the raster layers.  Is this working as expected?  Is the display field not defined for raster layers?  I apologize if this is a stupid question.  I just want to be able to show the display field of layers to users of my javascript app regardless of whether the layer contains vector or raster data. ... View more

Hi all! I have been trying to send dozens of queries to retrieve data points with different parameters.  I can't figure out how to tell which response came from which query.  The exact number of queries will be unknown, but it will most likely be 100+.  I can't see creating over 100 named functions to callback, and I can't figure out how to get external information into a shared callback or anonymous inline function.  As I loop through the array containing the data that will make up the queries, I have an index.  If I use  the index value within an inline function, by the time the callback function is called, the index is always max.  for(var i = 0; i < queryArray.length; i++) {    queryTask.execute(query, function(featureSet) {       ...       alert("Query Task #" + i);    }); } If queryArray.length = 25, I get 25 alert windows with "Query Task #24". Does anybody know how to know which response corresponds to which request? Thanks! ... View more

Hi all! I have over a million species occurrence points, and users are supposed to be able to select points by species.  Problem is our most common species show well over 100k points.  In the past I've created an arbitrary grid where each cell has the total number of points within that cell.  Then I just show the grid cells that contain at least 1 point.  Queries weren't allowed until the user zoomed to a specific level, where the individual points were limited to a few thousand.  This time I can't limit queries to certain zoom level, nor can I afford to use thousands of separate grids with the point counts for each individual species.  I would love to use some form of heat map (my grids were a rudimentary sort of heat map), or something else to summarize the points when zoomed way out. I was thinking of using the grid to query all the matching features in each cell, but I didn't know if I could send 150 or so queries at the same time. Has anyone done something like this before?  I could use any guidance you can provide.  I'm using ArcGIS Server 9.3. Thanks for your help! ... View more

Hi all, I'm trying to figure out how to use the Draw toolbar to allow a user to draw either a point or an extent.  I'm trying to use this for the identify tool.  I don't want the user to have to select either point or extent, I want the application to be intelligent enough to determine if the user has clicked a single point, or clicked and dragged the mouse to enclose an extent.  The problem I'm running into is if the Draw toolbar is in EXTENT mode, a single click starts drawing, and another single click finishes the drawing.  I want a single click to represent a point.  Is this possible?  Also, am I doing this the wrong way?  Is there a better way for the user to be able to identify from either a point or an extent? This code seems like it would work, but since the Draw toolbar doesn't fire the "onDrawEnd" event on a single click if drawing an EXTENT, it doesn't. var drawToolbar = new esri.toolbars.Draw(map);     drawToolbar.activate(esri.toolbars.Draw.EXTENT);     dojo.connect(drawToolbar, "onDrawEnd", function (geom) {         if(geom.xmin == geom.xmax && geom.ymin == geom.ymax) {             geom = new esri.geometry.Point(geom.xmin, geom.ymin, geom.spatialReference);         }         // execute an identifyTask using geom     }); Thanks for your help. ... View more

Aloha, I've created a sample map service out of US state and county boundaries. http://166.122.241.243/ArcGIS/rest/services/National/MapServer I'm trying to display it on a flex map using either GraphicLayer or FeatureLayer.  I can't get the FeatureLayer to show up at all, and if I use a GraphicLayer, I can query a single state, sometimes, but usually, the query times out.  I thought this might have to do with the spatial reference of my map or base layer (an ArcGISTiledMapServerLayer) not matching, but I've since changed my map service to match the tiled layer, and I don't see any difference.  I have another FeatureLayer from an ArcGIS server, and it works fine--and it uses a different spatial reference from either.  Can someone here point me in the right direction?  Any hints will be helpful! Edit: I've since discovered that the FeatureLayer does "load" and the LayerDetails are populated, but no graphics are returned.  I'm still stumped. Mahalo! ... View more

I've created a map with an ArcGISTiledMapServiceLayer.  Instead of using the explicit extent for the map, it appears to be using the extent from the ArcGISTiledMapServiceLayer.  I need to know how to explicitly set the extent that the map uses when it is first displayed.  This is the code I'm using with the service url hidden. <esri:Map id="map">    <esri:extent>       <esri:Extent xmin="-60884403.02"       ymin="657021.19"       xmax="45425778.42"       ymax="12202069.94"       spatialReference="{new SpatialReference(102113)}"/>    </esri:extent>    <esri:ArcGISTiledMapServiceLayer             url="http://DOMAIN/ArcGIS/rest/services/SERVICE/MapServer" /> </esri:Map> Any help will be greatly appreciated. ... View more