Latest Contributions by derekswingley1

‎04-25-2011

Are you sure response is a string? What does the rest of your esri.request() code look like? In practice, especially when talking to ArcGIS Server endpoints, I don't think there are many (any?) times you'd want text over json. Why mess around with wrapping a response in parens and calling eval() when the server can return jsonp?

‎04-25-2011

True, we're not likely to find a solution to OP's question/problem in this thread. But I'd like to continue this discussion as I think we still need to clarify for anyone else who comes across this thread. A featureSet, in the context of the JavaScript API and as delivered to the client, is a JSON object. Let's look at this from another angle. How about we talk about this in terms of the REST API? If you want features from a layer in a map service, how do you get them? You use the query endpoint. If you use the endpoint via the JavaScript API's QueryTask (recommended) or through esri.request, you are getting back JSON (as long as you specify f=json when using esri.request).

‎04-25-2011

Posted an answer over on gis.stackexchange: http://gis.stackexchange.com/questions/8896/feature-layer-with-ondemand-mode/8912#8912

‎04-25-2011

@hzhu As you request more features (using either esri.request or a queryTask), the response size will grow. If the server only returned the extent of the features that satisfy a request, then the response size will be consistent if you ask for 10 or 1000 features. To my knowledge, there's not an out of the box way to get just a bounding box for features that satisfy a request w/o sending all of the geometries to the client. How is the return value of esri.request different than a queryTask? The JavaScript syntax for working with them differs but both fetch plain text from the server (you can verify this via firebug or chrome's dev tools) that is then turned into JavaScript objects on the client.

‎04-22-2011

@hzhu that still brings all the geometries across the wire, which is what OP is trying to avoid.

‎04-22-2011

Maybe "easier" was the wrong word... I think seeing the point move as you drag it provides a better user experience.

‎04-21-2011

There's an easier way to do this. I think the code below was originally posted in the old forums but I've hung on to it for a while: <!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>Moving a marker</title> <link rel="stylesheet" type="text/css" href="http://serverapi.arcgisonline.com/jsapi/arcgis/2.2/js/dojo/dijit/themes/tundra/tundra.css"> <script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=2.2"></script> <script type="text/javascript"> dojo.require("esri.map"); dojo.require("dojox.gfx.move"); dojo.addOnLoad(init); var map; function init() { map = new esri.Map("map"); dojo.connect(map, "onLoad", onMapLoad); var tiledMapServiceLayer = new esri.layers.ArcGISTiledMapServiceLayer("http://server.arcgisonline.com/ArcGIS/rest/services/ESRI_Imagery_World_2D/MapServer"); map.addLayer(tiledMapServiceLayer); } function onMapLoad() { var geometry = map.extent.getCenter().offset(0, 15); var symbol = new esri.symbol.SimpleMarkerSymbol().setColor("red"); var graphic = new esri.Graphic(geometry, symbol); // Add a graphic map.graphics.add(graphic); // Make the shape moveable var dojoShape = graphic.getDojoShape(); var moveable = new dojox.gfx.Moveable(dojoShape); // Update the geometry at the end of move var moveStopToken = dojo.connect(moveable, "onMoveStop", function(mover) { // Get the transformation that was applied to // the shape since the last move var tx = dojoShape.getTransform(); var startPoint = graphic.geometry; var endPoint = map.toMap(map.toScreen(startPoint).offset(tx.dx, tx.dy)); // clear out the transformation dojoShape.setTransform(null); // update the graphic geometry graphic.setGeometry(endPoint); // You can find quite a bit of information about // applying transformations to Dojo gfx shapes in this // document: // http://docs.dojocampus.org/dojox/gfx#coordinates-and-transformations }); } </script> </head> <body class="tundra"> <p> </p> <div id="map" style="width:700px; height:500px; border:1px solid #000;"></div> </body> </html>

‎04-19-2011

Unless you want to write a server object extension to do this, I think you're stuck sending geometries to the client and computing an extent from them.

‎04-15-2011

That's possible, but did you try maxAllowableOffset? It's not talked about much but it will do exactly what you want: generalize geometries returned from your service for an appropriate scale.

‎04-15-2011

A quick search for "zip codes" at http://gis.stackexchange.com turns up some solid resources: Where can I obtain an up-to-date list of US ZIP Codes with Latitude and Longitude Geocodes? Most Up-To-Date Source for US Zip Code Boundaries That being said, "zip3" and "zip_poly" datasets still ship on the Esri Data & Map DVDs.

‎04-15-2011

With HTML 5 coming, I think the JavaScript API is a totally sound development platform. Good Luck! I'm going to nit pick a little... What does this really mean? HTML5 is coming?

‎04-15-2011

Are you talking about accessibility like a11y or are you talking about not needing a browser plug-in to view a site/app? For editors, I'm a fan of more advanced text editors as opposed to a full blown IDE. On Windows, I like gVIM or Notepad++. On OSX, MacVIM is my preferred choice. Regarding the WYSIWYG aspect, I would say you don't need this. There's no compilation step in JS development so just save and reload your app in your browser. You'll immediately see your changes.

‎04-15-2011

Whichever one you end up going with (querytask or a feature layer), look into using maxAllowableOffset to generalize your geometries before they're sent to the client.

‎04-15-2011

Hi Anaish, You may use esri.geometry.Polygon.getExtent() method to get the extent of a polygon. Here is its documentation: http://help.arcgis.com/en/webapi/javascript/arcgis/help/jsapi_start.htm#jsapi/polygon.htm#getExtent While correct, I don't think this addresses OP's original question. There's not a way that I know of to only get an extent back from a REST endpoint. You're either getting geometries, or you're not. But it seems like a lot of extra effort to send actual geometries over the wire when you're only interested in their extents. Are you open to using pre-computed extents and loading those from a .json file? I used this strategy in a dijit I did a while back: https://github.com/swingley/zoomto_dijit

‎04-12-2011

GeoRSS is XML so a good place to start would be the Data Access - XML Data sample. You'll need to use a proxy page if you're app is not running on the ansur.no domain.

Online Status	Offline
Date Last Visited	‎11-11-2020 02:23 AM

My Ideas

Latest Contributions by derekswingley1

Re: Get extent of polygons

Re: Get extent of polygons

Re: Feature Layer with ONDEMAND mode

Re: Get extent of polygons

Re: Get extent of polygons

Re: Drag Graphics Point and Drop at New Location

Re: Drag Graphics Point and Drop at New Location

Re: Get extent of polygons

Re: problem with query on hover

Re: Postal / zip code polygon

Re: Switching from Flex to Javascript API

Re: Switching from Flex to Javascript API

Re: problem with query on hover

Re: Get extent of polygons

Re: GeoRSS

Re: URL Parameters

Re: URL Parameters

Re: cant see text in drawing toolbar tooltip!

Re: Customise cursor tooltip

Re: esri.layers.FeatureLayer is not a constructor ...