FireBug tells me that your basemap opacity is at 0.7 while the
hillshade above it is at 0.99--and it also seems that in Firefox the
hillshade is on the bottom and that the basemap is on the top and you
are effectively viewing the hillshade through the basemap!

Was that the intent? I would assume that it would look best if the
basemap were on the bottom at opacity 1 and the hillshade above it had
opacity less than or equal to 1.


- Beau

On Tue, Jun 2, 2009 at 3:58 PM, Colin Marquardt <[email protected]> wrote:
> Hi guys,
>
> I just cannot live with the fact that "they" have awesome hillshading
> in a slippy map and I cannot replicate it with Mapnik and OpenLayers:
>
> http://www.mapy.cz/#x=132471...@y=138964992@z...@mm=rtp
>
> (that area nicely shows the tile overlays).
>
> All *I* can manage with this kind of layering is
> http://opentiles.com/cmarqu/relief.html?zoom=13&lat=50.9354&lon=14.20458&layers=BT
> or
> http://opentiles.com/cmarqu/relief_flipped.html?zoom=13&lat=50.9354&lon=14.20458&layers=BT
> (layer order changed and opacities adapted.)
>
> When you toggle their "Stínování" layer, the brightness and crispness
> of the map doesn't change much, it just gets hillshading.  My map is
> very foggy in comparison. It's most likely not the thinner/smaller
> fonts in my map, since the "Bad Schandau" there is as bold and black
> as possible, but still washed out in the map due to the opacity. Their
> text somehow stays at 100% black.
>
> The relief layer is different of course, but not so much IMO:
> http://m4.mapserver.mapy.cz/relief-l/11_7e60000_8480000 vs.
> http://opentiles.com/cmarqu/tiles_relief/12/2209/1372.png
>
> Does anybody have a guess as to what the crucial difference is?
>
> Doing the hillshading like this could have the advantage of a smaller
> tile size overall, since you could reduce the number of colors needed
> for the roads layer. With an all-in-one tile (roads and hillshading),
> there are too many mixed colors which would get ugly banding if
> color-reduced too much.
>
> (FWIW, my all-in-one tiles are at
> http://opentiles.com/cmarqu/?zoom=13&lat=50.92308&lon=14.16252, done
> with the process that Marcin described a while ago.)
>
> Cheers
>  Colin
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>
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