[ka-Map-users] kaMap.js setTile routine being invoked many more times then I expect?

[Stephen Woodbridge]

I think you want to set the VERSION metadata for the layer and then 
update it anytime you change the layer which will cause the cached tiles 
to be expired and replaced by newer tiles.

-Steve

Samuel Doyle wrote:
> Thanks,
> 
> So using force option in tile.php is not going to work in this 
> situation. Any other way to have mapserver force the tile to be redrawn 
> per refresh_interval then? I mean if and only if the tile has changed? 
>  From the init.php it looks as if you use the redraw_interval option and 
> have tilesource set to redraw should do it but it doesnt appear to work. 
> I mean I can manually copy over a new version of a dbf file and verify 
> that the file timestamp has changed but whenever the refresh takes place 
> it isn't updated. I manually need to remove the tiles to have them 
> redrawn again. Any ideas?
> 
> Thanks, S.D.
> 
> */Paul Spencer <pspencer at dmsolutions.ca>/* wrote:
> 
>     Samuel,
> 
>     setTile is called once for each tile on each layer. Depending on
>     your tile size and viewport size, you could have as many as 20-30
>     tiles per layer. The minimum number of tiles per layer would be 9 (3
>     wide and 3 high) but typically ends up being larger. Don't forget
>     that there are some tiles off screen. For instance, if your viewport
>     is 600 x 600 pixels and your tiles are 200x200, you will likely end
>     up with 5 or 6 tiles wide and 5 or 6 tiles high, thus 25-36 tiles per
>     layer.
> 
>     Cheers
> 
>     Paul
> 
>     On 28-Jul-06, at 8:47 PM, Samuel Doyle wrote:
> 
>      > Hi,
>      >
>      > I was doing some debugging related to the performance of passing
>      > the force option to tile.php and noticed that this setTile routine
>      > was being invoked many more times then I expect. I mean I have only
>      > three layers added to my map file that I want to have the force
>      > redraw option applied to but it appears that these layers are being
>      > set many more times over. Can someone explain what is happening here?
>      >
>      > Thanks, S.D.
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> 
> 
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