On Sun, Jan 20, 2013 at 9:40 AM, Ákos Maróy <a...@maroy.hu> wrote:
> On 20/01/13 00:50, Michael Bedward wrote:
>
> Yep, the standard JAI TiledImage class keeps all of its tiles in
> memory - that's why DiskMemImage was created.
>
> Sorry - no suggestions for what might be happening with batik and the
> different rendering results.
>
>
> interestingly for DiskMemImage, it exhibits the same batik issue, but on
> top of that, it has a strange issue with rendering text labels. sometimes
> all labels are rendered, sometimes only some of them, sometimes none. this
> seems to be somehow related to how big the target image is.
>
> consider the following sample images:
>
> http://akos.maroy.hu/~akos/dmi-2000000-70.tif
> http://akos.maroy.hu/~akos/dmi-1000000-70.tif
> http://akos.maroy.hu/~akos/dmi-500000-70.tif
> http://akos.maroy.hu/~akos/dmi-250000-70.tif
>
> these are images of the same area (same data source, same layers), with 70
> DPI, with different scales: 2.000.000, 1.000.000, 500.000 and 250.000. the
> SLDs used are:
> http://code.google.com/p/openaviationmap/source/browse/trunk/rendering/oam_airspaces.sld
>
> http://code.google.com/p/openaviationmap/source/browse/trunk/rendering/oam_navaids.sld(beware:
> lots of different denominations, with only the rendering sizes
> changing)
>
> as you can see, the bigger the image, the lower number of text labels
> appear. for the 1:2.000.000 scale image, it seems all of them are there.
> but some are already missing for the 1:1.000.000 scale image, and for the
> 1:250.000 scale, only a few in the top-left corner are rendered.
>
> the effect is the same if I increase the DPI value - this somehow this
> phenomenon is related to the size of the target image.
>
> at first, I don't even have a clue of where to look for what's going wrong
> here.
>
>
Hmm... labels are always drawn last, wondering if with bigger images the
tiles are getting swapped to disk, and
when they are retrieved back to draw the labels for some reason they are
not "writable" anymore.
Just a hunch, got nothing better
Cheers
Andrea
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