Re: [Qgis-developer] Approximate reprojection for vectors

[cavallini@faunalia.it]

I think Martin has profiled this problem and should have good data.

http://faunalia.it/pc

----- Reply message -----
Da: "Radim Blazek" <radim.blazek at gmail.com>
A: "cavallini at faunalia.it" <cavallini at faunalia.it>
Cc: "qgis-developer" <qgis-developer at lists.osgeo.org>
Oggetto: [Qgis-developer] Approximate reprojection for vectors
Data: dom, ott 2, 2011 17:34


You are right. I have done some tests and rendering with reprojection
takes obnly about 10% more time. I was convinced that it must be quite
time consuming. In fact, reprojection is a complex caclulation so I am
wondering  what can take so long time in rendering process so that the
reprojection is not significant.

Radim

On Sun, Oct 2, 2011 at 3:02 PM, cavallini at faunalia.it
<cavallini at faunalia.it> wrote:
> I do not see reprojection of vectors significantly slowing down rendering.
> Anyone does?
> All the best.
>
> http://faunalia.it/pc
>
> ----- Reply message -----
> Da: "Radim Blazek" <radim.blazek at gmail.com>
> A: "qgis-developer" <qgis-developer at lists.osgeo.org>
> Oggetto: [Qgis-developer] Approximate reprojection for vectors
> Data: dom, ott 2, 2011 14:40
>
>
> Hi,
> as you probably know, raster reprojection is using approximate
> reprojection to get acceptable rendering speed. Now I am thinking
> about a possibility to implement the same also for vectors, to speed
> up vectors rendering. What do you think about that? Does it make
> sense?
>
> Radim
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