P.S. using GDAL 1.7.2. On Jul 6, 2010, at 10:17 AM, William Kyngesburye wrote:
> For release, maybe disble it, and work on a solution for 1.6? > > A note about the raster format - I wonder if it only affects rasters without > overviews. For the vrts in Greg's test, though the files referenced in the > vrts are JP2s, does a vrt inherit the overviews? I did a test with a single > 1 GiB JP2 and it generates the legend icon nearly instantaneously. A 1.3 GiB > tiff without overviews takes a long time, yet the same with overviews is > fast. A 200MiB tiff without overviews has a noticable delay, but it's not > horrible. > > Though, Greg's test vrts are quite small, just 14MiB across 4 vrts. Maybe > there's something else with a vrt that slows down the legend generation? > Zooming and panning are not affected. > > On Jul 6, 2010, at 4:21 AM, Marco Hugentobler wrote: > >>> (a raster scaled down to 16x16 pixels usually >>> doesn't provide a good overview) >> >> I made a little self-test here and it was quite easy to distinguish >> different >> topographic map sheets by their legend icons (even if they have exactly the >> same color schema). >> >> Regards, >> Marco >> >> Am Dienstag, 6. Juli 2010, um 10.26:10 schrieb Martin Dobias: >>> Hi >>> >>> On Tue, Jul 6, 2010 at 8:35 AM, Marco Hugentobler >>> >>> <[email protected]> wrote: >>>> Hi William >>>> >>>> Ah, good to know it is the icon generation that makes loading projects >>>> with many raster layers slow. >>>> >>>> Making a user option to disable layer icons sounds good. However, this >>>> would involve a string change (option dialog). String freeze for 1.5 is >>>> already over for a while now. So (unless there is a better solution for >>>> the problem without string change) something for 1.6... >>> >>> in my opinion, we could actually remove this feature. I don't find it >>> particularly useful (a raster scaled down to 16x16 pixels usually >>> doesn't provide a good overview), it adds additional overhead when the >>> raster layer is loaded and further complicates the complex raster >>> code. Another argument could be that vector layer also don't have an >>> icon containing the preview. >>> >>> I'm just afraid of creating too many configurable options that barely >>> anyone will understand their purpose. >>> >>> Regards >>> Martin >> ----- William Kyngesburye <kyngchaos*at*kyngchaos*dot*com> http://www.kyngchaos.com/ First Pogril: Why is life like sticking your head in a bucket filled with hyena offal? Second Pogril: I don't know. Why IS life like sticking your head in a bucket filled with hyena offal? First Pogril: I don't know either. Wretched, isn't it? -HitchHiker's Guide to the Galaxy _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
