[Qgis-developer] Merging of incompatible changes

[Sandro Santilli]

On Sat, Oct 27, 2012 at 01:41:49AM +0200, Tim Sutton wrote:

> * One of the major limitations I and the many people that contact me
> about QGIS experience is lack of performance. Just yesterday I got an
> email from someone in Sudan trying to use QGIS to work with ~300 000
> point records and it taking 4 hours to do some simple operations on
> the dataset. 

I think such cases should be handled by only fetching a sample of the
data for visualization purpose, rather than the full set. And similarly
only a subset of vertices could be fetched when facing dense vectors.

This is something that might need an API change too, as you would need
the providers to be told when the data has to be fetched only for
visualization (thus generalization is possible) or for editing (thus
you want all the data, possibly forcing a restriction on extent).

Just my 2 cents.

--strk; 

 http://www.cartodb.com - Map, analyze and build applications with your data

                                       ~~ http://strk.keybit.net