[OpenLayers-Users] misaligned kamap tiles

[Tim Schaub]

Hey Ben-

Ben Brehmer wrote:
> Hello All,
> 
> I am in the process of converting a kamap application to use OpenLayers 
> and in doing so have run into an occasional tile loading problem.
> 

I've seen the problem you describe as well.  Can you make a ticket for 
this in Trac?

http://trac.openlayers.org/wiki/FilingTickets

You can set me as the owner if you like.  It will likely not get 
addressed before the 2.5 release - but I'll remember to look at it if 
you put my name on it.

Alternatively, if anybody else uses the ka-Map layer, any help is 
appreciated in supporting it.

Tim

> If you have a look at the attached screen shot you will see one valid 
> tile (highlighted with firebug) and several broken (pink tiles).
> The broken tiles are offset in the X and Y direction and are broken 
> because they are referencing an invalid path in the kamap generated cache.
> 
> Some other observations:
> -All the broken tiles are always in the same row OR column
> -The broken tiles always load after every single tile in the viewport 
> has loaded successfully. (ie. an extra row/column is loaded with broken 
> tiles)
> -This is unrelated to the OpenLayers.IMAGE_RELOAD_ATTEMPTS setting since 
> the tiles are broken due to a incorrect image path (not that they are 
> failing to load on the first attempt)
> 
> Any tips or possible leads would be greatly appreciated. I guess my main 
> question is why would OpenLayers be trying to load extra columns/rows 
> after all the columns/rows have already successfully loaded?
> 
> Also,
> 
> Thanks,
> 
> Ben
> 
> -----------------------
> My map and layer setup:
> --------------------------
>  var options = {
>    scales: [30000000, 15000000, 7500000, 4000000, 2000000, 750000, 
> 400000, 200000, 125000, 75000, 35000, 17500, 12000, 7500],
>    maxResolution: "auto",
>    minResolution: "auto",
>    units: 'm',
>    maxExtent: MAX_EXTENTS,
>    controls: [mouseEvents]
>  };
> 
> map = new OpenLayers.Map('ol_map', options);
> 
>  layer_base = new OpenLayers.Layer.KaMap("Land",
>                                                            
> "http://brock.simplymap.com/kamap/tile.php",
>                                                            {g: 
> "__base__", map: "basemap.map", layers: "def", transparent: 'true', 
> mapid: '0'},
>                                                            {tileSize: 
> new OpenLayers.Size(200,200), srs:'epsg:99999', format: "image/gif", 
> Opacity: 0.3, isBaseLayer: true});
> 
> 
> 
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> 
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