[OpenLayers-Dev] ArcGIS server 9.2 support for OL

[mpriour]

We have actually used it in 2 applications to great success. Though we did
have to get some help from the author to properly configure some of the
parameters on a near polar projection system.
There was no significant difference in performance between this and any
other pre-rendered tile retrival layer.
Matt Priour
Kestrel Computer Consulting


Christopher Schmidt-4 wrote:
> 
> On Fri, May 16, 2008 at 07:38:26AM -0700, Yeroc wrote:
>> 
>> Hi...
>> 
>> Did this patch make it into OpenLayers?  I'm interested in this
>> functionality and wonder if it's now a standard part of OpenLayers and if
>> not, why not?  I didn't see any followups to this initial email...?
> 
> I never had a server I could test against, or anyone who confirmed it
> worked other than stvn, and with only that reassurance, I wasn't
> prepared to put it in trunk. 
> 
> It was in a sandbox of stvn's somewhere, I think, but I don't know
> where. The FAQ might mention it.
> 
> -- Chris
> 
>> Thanks,
>> Corey
>> 
>> 
>> Steven M. Ottens-3 wrote:
>> > 
>> > Hi all,
>> > 
>> > With some help of Chris I've managed to access the tiles generated by 
>> > ArcGIS server 9.2.
>> > There's a public accessible server at: 
>> > http://serverx.esri.com/antialiasingexamples/
>> > ArcGIS server stores its prerendered tiles in a directory structure 
>> > similar to TMS:
>> > layername/zoomlevel/rownumber/columnnumber.filetype:
>> >
>> http://serverx.esri.com/arcgiscache/DG_County_roads_yesA_backgroundDark/Layers/_alllayers/L03/R0000147b/C0000138d.png
>> > It also has an XML providing some extra data:
>> >
>> http://serverx.esri.com/arcgiscache/DG_County_roads_yesA_backgroundDark/Layers/conf.xml
>> > 
>> > The row number and column number are stored in hexadecimal and are 
>> > calculated from the TileOrigin (upper left).
>> > 
>> > attached is a zip with two files and one patch:
>> > ags2.html goes into examples and provides an example with the data of 
>> > above mentioned site
>> > AGS.js goes into lib/OpenLayers/Layer and provides the logic for the 
>> > tile-url calculation
>> > openlayers.diff adds AGS.js to OpenLayers.js
>> > 
>> > There's one major issue: you need specify the correct maxExtent to make 
>> > sure that no tiles are requested outside the realm of the cache. Also 
>> > this maxExtent should be a perfect fit for the tiles otherwise a weird 
>> > offset is shown when zooming in and out. (I haven't calculated the 
>> > proper extent yet, so one can see this erratic behavior).
>> > 
>> > Regards,
>> > Steven
>> > 
>> > 
>> 
>> -- 
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>> 
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> 
> -- 
> Christopher Schmidt
> MetaCarta
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> 
> 

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