Ah good discovery.   

I had this misguided assumption that people may want to access the data (say 
for batch processing) without looking at it.  

Hense the renderer and catalog being separate.

I suppose many catalog resources make use of the same renderer so it is not all 
bad.



--  
Jody Garnett


On Wednesday, 13 June 2012 at 10:54 PM, George Schole wrote:

> Managed to solve this one.Here are my findings:
> InternalRenderMetricsFactory.canRender would return 
> delegate.canRender(context). The problem was that delegate was of type 
> RasterRenderMetricsFactory instead of BasicWMTRenderMetricsFactory.  
> Upon further inspection I found that just checking the 
> net.refractions.udig.catalog.wmt plugin in run configurations->plugins does 
> not require for the ....render.wmt.basic plugin to be included. So if you 
> check the catalog.wmt plugin and then click the “add required plugins” button 
> you will not get to see any wmt layer and you will also not get any error 
> message that may give you the idea that a vital plugin was not included. 
> You'd think that if the catalog.wmt plugin was included the user would want 
> to see some wmt layers onscreen :). Newbies (like me) beware!
>  
> Cheers
>  
>  
> From: George Schole <georgesch...@yahoo.com (mailto:georgesch...@yahoo.com)>
> To: User-friendly Desktop Internet GIS <udig-devel@lists.refractions.net 
> (mailto:udig-devel@lists.refractions.net)>  
> Sent: Tuesday, June 12, 2012 1:47 PM
> Subject: [udig-devel] Wmt georesource is not rendered. Why??
>  
> Hello all,  
>  
> I'm encountering a very frustrating problem. I am trying to render a mapnik 
> layer using eclipse 3.7.2 with udig sdk 1.3.1. Using eclipse 3.6.1 with udg 
> sdk 1.2.1 and executing the exact same code the mapnik layer renders 
> correctly .  
> So map.sendCommandASync(new AddLayersCommand(theres));  
> w returns different results in what seems to be virtually identical cases; by 
> the way “theres” has the following content ( in both run cases) : 
> [WMTGeoResource(wmt://localhost/wmt/net.refractions.udig.catalog.internal.wmt.wmtsource.OSMMapnikSource#blank)]
>   
> Some other observations:  
> 1.
>  
> in the non-rendering case the console output is  
> !MESSAGE Unable to parse version from about.mappings file. Defaulting to a 
> blank string.
> log4j:WARN No appenders could be found for logger (org.geotools.factory).
> log4j:WARN Please initialize the log4j system properly.
> [WMTService.createService] 
> wmt://localhost/wmt/net.refractions.udig.catalog.internal.wmt.wmtsource.OSMMapnikSource
> Application Started: 3746
> [WMTSource] EPSG:900913 is not in the database, now it is created manually
> [WMTService.createService] 
> wmt://localhost/wmt/net.refractions.udig.catalog.internal.wmt.wmtsource.OSMMapnikSource
>  
> in the rendering case te console output is something like:  
> [WMTSource] EPSG:900913 is not in the database, now it is created manually
> [WMTService.createService] 
> wmt://localhost/wmt/net.refractions.udig.catalog.internal.wmt.wmtsource.OSMMapnikSource
>  
> [BasicWMTRender.render] is called  
> [BasicWMTRender.render] is called
> [BasicWMTRender.render] is called
> [BasicWMTRender.render] is called
> [BasicWMTRender.render] Scale: 3.572181633149704E8
> [BasicWMTRender.render] Scale: 3.572181633149704E8
> [BasicWMTRender.render] Scale: 3.572181633149704E8
> [BasicWMTRender.render] Scale: 3.572181633149704E8
> [OSMTile.getTileFromCoordinate] 18/234940/101706 lon: 142.6415091924573 lat: 
> 37.358490807542694
> [OSMTile.getTileFromCoordinate] 18/234940/160437 lon: 142.6415091924573 lat: 
> -37.358490807542694
> …
> …
> [WMTSource.addTileToList] Was not in cache: Mapnik_2_1_0
> [OSMTile.getTileFromCoordinate] 2/3/2 lon: 142.6415091924573 lat: 
> -37.358490807542694
> [OSMTile.getTileFromCoordinate] 2/0/2 lon: -142.6415091924573 lat: 
> -37.358490807542694
> [OSMTile.getTileFromCoordinate] 2/0/1 lon: -142.6415091924573 lat: 
> 37.358490807542694
> [WMTSource.cutExtentIntoTiles] Adding right neighbour: Mapnik_2_1_0
> …
> …
> !ENTRY net.refractions.udig.catalog.internal.wmt 4 0 2012-06-11 19:05:19.175
> !MESSAGE WMT GetTile: http://tile.openstreetmap.org/2/2/3.png
>  
> !ENTRY net.refractions.udig.catalog.internal.wmt 4 0 2012-06-11 19:05:19.176  
> !MESSAGE WMT GetTile: http://tile.openstreetmap.org/2/0/0.png  
>  
> Please give me a few tips on how I might solve this problem. I really want to 
> use an osm map in my little project. I would use the older udig sdk but I 
> can't seem to render a postgis layer using the older sdk :)). It works in the 
> new one. I think it has something to do with the fact I have postgis 2.0 
> installed.  
>  
> PS @andrea antonello: I see that you have been working on the wmt plugin 
> lately.  
> Please tell me you encountred these rendering problems. :)
>  
> Thanks
>  
>  
>  
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel
>  
>  
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel
>  
>  


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