Load WGS84 Local Shapefile and Display in Web Mercator Application

Question

Original User: tbrophy

All,
 
I downloaded and am using �??Shape File Overlay for Sample Viewer�?� from the ArcGIS resource Center, submitted 3-4-2010 by �??HardWork�?�. It works great, but I need it go a step further.
�??�?�Shape File Overlay for Sample Viewer�?��?�
http://resources.esri.com/arcgisserver/apis/flex/index.cfm?fa=codeGalleryDetails&scriptID=16846
 
I asked this in a previous forum but thought I would start a new thread. . .
(http://forums.arcgis.com/threads/8268-Load-Local-Shapefile-with-Symbology-and-Attributes)
------------------------------------------------------------------------------------------------------------------------------------
 
My application is in Web Mercator (102100). So every time my users want to use this tool, they need to convert their shapefile from WGS 1984 Geographic (4326) into Web Mercator (102100) in ArcMap first. Then, and only then, can the shapefile be converted into a graphic and shown in the WM application.
 
Can anyone show me a way to convert this programmatically?
 
The conversion would always be the same (4326) -- (102100).
 
********* My environment *********
Adapted Sample Flex Viewer: flexviewer-src-1.0.zip (Build 06.12.09) 
agslib-1.2.swc 
flex_sdk_3.2 
Required Adobe Flash Player version 10
********* My environment *********
 
Any help would be greatly appreciated. Attached are my adjust files and one of my sample shapefiles in WGS 1984 Geographic (4326).

CHLORINE_Release_Model4326.zip

ShpOverlay.zip

CHLORINE_Release_Model102100.zip

dbf_swc.zip

map_cleanup.png

site_shrimp.png

investigate_crime.png

establish_context.png

LilyChen · Answer

Hello, your posts here have been very helpful for me.  I'm also trying to load shapfiles into a map with a spatial reference of 102100.  However, after my shapefile loads, I noticed that it only shows up (at the correct location) if I'm zoomed out all the way, and if I try to zoom in (beyond the 3rd ticker on the zoom bar), the shapefile just disappear. Was wondering if anyone has a clue to why this is happening.

Thanks in advance!

Anonymous User · Answer

Original User: tbrophy

Melinda,
 
Thank you for your response. It got me on the right track and figured it out. Here's the final code for "loadShapefile":
 
private function loadShapefile(shpByteArray:ByteArray, dbfByteArray:ByteArray):void
{
var index:int = 0;
const array:Array = [];
const shpReader:ShpReader = new ShpReader(shpByteArray);
const dbfHeader:DbfHeader = new DbfHeader(dbfByteArray);
graphicsLayer.graphicProvider = new ArrayCollection(array);
while (shpReader.hasMore())
{
var shpPolygon:ShpPolygon = shpReader.readShpPolygon();
var dbfRecord:DbfRecord = DbfTools.getRecord(dbfByteArray, dbfHeader, index++);
//geoToWebM Start 
var myGraphic:Graphic = new Graphic();
myGraphic.geometry = WebMercatorUtil.geographicToWebMercator(shpPolygon.toPolygon());
myGraphic.symbol = myPoly; 
graphicsLayer.add(myGraphic);
//geoToWebM End
//array.push(new Graphic(shpPolygon, shpSymbol, dbfRecord.values));
}
//graphicsLayer.graphicProvider = new ArrayCollection(array); 
map.addLayer(graphicsLayer);
//map.extent = shpReader.extent.expand(1.5);
//geoToWebM Start
map.extent = WebMercatorUtil.geographicToWebMercator(shpReader.extent.expand(2.0)) as Extent;
//geoToWebM End
msgBox.htmlText = "Polygon footprint has been successfully loaded.";
}
 
I also attached the mxml.
 
Thanks again!

ShpOverlay_84_wm.zip

MelindaFrost · Answer

I was implementing this also and was running into the same problem as you. What is missing is converting the graphic to WebMercator too. I am just working with points so this is what I did to get them show up on maparray.push(new Graphic(WebMercatorUtil.geographicToWebMercator(shpPoint.toPoint()), new SimpleMarkerSymbol(styleMark.text.replace(repPattern,"").toLowerCase(),sizeMark.value,cpMark.selectedColor,alphaMark.value/100), dbfRecord.values));
array.push(new Graphic(WebMercatorUtil.geographicToWebMercator(shpPoint.toPoint()), txtSym, dbfRecord.values));