ECW slow

Jan 7, 2016 at 11:11 PM
Edited Jan 7, 2016 at 11:17 PM
Dear MapWinGis Team,

I am using an ECW file of 3 Gb. Loading it takes about 30 seconds and zooming and panning takes multiple seconds too. Zoom extents takes about 20 seconds.

Using QGIS or another GIS package does that factor 10 faster.

Only when I zoom in to a small part i have satisfying speed of zooming and panning. MapWindow has no issues like that with for example shapefiles. Even large (200Mb +) are rendering fast.

What can i do to make ECW files load and render faster? I'd prefer not to export it to another raster file format.

Jan 21, 2016 at 2:02 PM
We had some issues with the ECW file:

Which version of MapWinGIS are you using? It should be fixed in v4.9.3.6.
If the problem persists could we get the ECW file so we can test ourself?