[QGIS-trac] [Quantum GIS] #2799: QGIS is painfully slow on large datasets!

[Quantum GIS]

#2799: QGIS is painfully slow on large datasets!
------------------------------------------------+---------------------------
   Reporter:  sandinog                          |              Owner:  nobody       
       Type:  defect                            |             Status:  new          
   Priority:  major: does not work as expected  |          Milestone:  Version 1.6.0
  Component:  Build/Install                     |            Version:  1.4.0        
   Keywords:  'large dataset', speed            |   Platform_version:               
   Platform:  Windows                           |           Must_fix:  No           
Status_info:  0                                 |  
------------------------------------------------+---------------------------
 I tried using QGIS with a fairly large dataset (all parcel polygons,
 roadway centerline lines, and street light points in Sacramento County,
 California (about 105 Mbytes of shapefiles, 155 Mbytes of attached
 database information). Every re-rendering took so much time!
 1. It seems like the program is doing too much 'behind the scenes,' like
 it should use scale and the window size to re-render what the user can
 see, and not worry about what's off-screen, at least until a change of
 window coordinates (pan) or change of scale (zoom) is made.

 2. I'm willing to upload the dataset I've been using (although the data
 owners don't really want the databases showing up all over the net), but
 given the size, I can hardly e-mail them.

 Until the program can handle larger datasets, its going to remain a toy
 and a nice idea, but not a viable alternative to ArcGIS.

-- 
Ticket URL: <https://trac.osgeo.org/qgis/ticket/2799>
Quantum GIS <http://qgis.org>
Quantum GIS is an Open Source GIS viewer/editor supporting OGR, PostGIS, and GRASS formats