Latest Contributions by danielconrad

‎01-03-2014

Hi, I recently incorporated a map into an existing project and I am receiving a null pointer exception when trying to load a wms layer. I found that the project has a dependency on a jar called "xerces.jar". This jar has a resource in it that sets the SAXParserFactory implementation to be org.apache.xerces.jaxp.SAXParserFactoryImpl. When this jar is not included, the SAXParserFactory implementation that is used is com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl and the wms layer loads fine. I was wondering if anyone has encountered this issue and had a work around. I am unable to remove the dependency from the project. Thanks. Here is the stack trace: java.lang.NullPointerException at com.esri.core.internal.tasks.f.a.a(Unknown Source) at com.esri.core.internal.tasks.f.a.endDocument(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.endDocument(Unknown Source) at org.apache.xerces.impl.XMLDocumentScannerImpl.endEntity(Unknown Source) at org.apache.xerces.impl.XMLEntityManager.endEntity(Unknown Source) at org.apache.xerces.impl.XMLEntityScanner.load(Unknown Source) at org.apache.xerces.impl.XMLEntityScanner.skipSpaces(Unknown Source) at org.apache.xerces.impl.XMLDocumentScannerImpl$TrailingMiscDispatcher.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) at com.esri.core.internal.tasks.f.b.a(Unknown Source) at com.esri.map.WmsDynamicMapServiceLayer.internalInit(Unknown Source) at com.esri.map.Layer$1.run(Unknown Source) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:722)

‎11-20-2012

Hi, I need to calculate the area of a geometry whose spatial reference is WGS84. I did not find a geodesicArea method on the GeometryEngine class, so I went to use the calculateArea2D method in the Geometry class. This method says: "If the spatial reference is a Geographic Coordinate System (WGS84) then the 2D area calculation is defined in angular units". I want to convert the output of this method to acres, but I am having trouble determining the angular unit of the output. AngularUnit.Code lists 10 different angular units. Does anyone know what the unit is for the output of the calculateArea2D method? Thanks

‎07-27-2012

Hi, I am developing a web application that uses map.centerAt() to pan the user to different search results. While debugging my application, I noticed that from time to time my base map would disappear. I created a sample app that uses map.centerAt() to pan the map between LA and New York when the map is clicked. I inserted the html below and also attached it as a txt file. What I am seeing is that map.centerAt() works well when the user is zoomed out, but if they are zoomed in past level 17 the map goes white and the tiled service flickers when I pan with the mouse. I was wondering if anyone else has experienced this behavior. I am only seeing this in IE9. Thanks! [HTML]<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; 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>Test Center At</title> <link rel="stylesheet" type="text/css" href="http://serverapi.arcgisonline.com/jsapi/arcgis/3.0/js/dojo/dijit/themes/claro/claro.css"> <script type="text/javascript">djConfig = { parseOnLoad:true }</script> <script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=3.0"></script> <script type="text/javascript" charset="utf-8"> dojo.require("esri.map"); var map; var lastPoint; function init() { map = new esri.Map("map"); dojo.connect(map,"onLoad",mapLoaded); var tiledMapServiceLayer = new esri.layers.ArcGISTiledMapServiceLayer("http://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer"); map.addLayer(tiledMapServiceLayer); } function mapLoaded() {  var laPoint = new esri.geometry.Point(-13163009.16521190,4035986.6473330655, map.spatialReference); var nyPoint = new esri.geometry.Point(-8238434.715895471,4970328.593163353, map.spatialReference); lastPoint = laPoint; dojo.connect(map, "onClick", function(evt) { if(lastPoint == laPoint) { lastPoint = nyPoint; map.centerAt(nyPoint); } else { lastPoint = laPoint; map.centerAt(laPoint); } }); } dojo.addOnLoad(init); </script> </head> <body class="claro"> <div style="position:relative;"> <div id="map" style="width:1024px; height:512px; border:1px solid #000;"> </div> </div> </body> </html>[/HTML]

‎04-27-2012

Hi, I published a service on ArcGIS Server where I specified an order on my layer's fields in my mxd. When I execute an identify task using the android sdk, I noticed that my identify results do not maintain the ordering of the returned fields and instead return the attributes in what appears to be a HashMap. I noticed that the json returned by the identify service does have the fields ordered properly for each identify result. I was just wondering if this was a known issue that will be fixed in later releases, or if there is another method I am suppose to be using to acquire the ordering of fields for and identify result. Thanks, Dan

‎01-03-2012

Hello, I am working on an application that makes use of a Server Object Extension that has an operation that returns an array of graphics that is formatted as json. When I was using the beta sdk I was able to call Graphic.fromJson() on each json object in the array and would get a graphic back. I have updated to the new version of the sdk and now Graphic.fromJson() always returns null for the same response from the SOE. I have even created some simple json strings that contain attributes and geometry and I receive null for them also. For sanity checking, I have tested the FeatureSet.fromJson() method and GeometryEngine.jsonToGeometry() to make sure that I am setting up a valid JsonParser and they both work. Are there other required values that need to be in the json for a graphic other than attributes and geometry? Thanks.

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Date Last Visited	‎11-11-2020 02:24 AM

My Ideas

Latest Contributions by danielconrad

Null Pointer Exception when loading WMS layer

Calculate area of geometry

map.centerAt causes Tiled service to disappear in IE.

Field ordering of IdentifyResult

Graphic.fromJson() always returning null.