[OpenLayers-Dev] ArcGIS server 9.2 support for OL

Yeroc cplists at gmail.com
Fri May 16 10:38:26 EDT 2008


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...?


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

View this message in context: http://www.nabble.com/ArcGIS-server-9.2-support-for-OL-tp9691195p17276333.html
Sent from the OpenLayers Dev mailing list archive at Nabble.com.

More information about the Dev mailing list