[Qgis-user] Reqgis 0.10 slow digitizing with grass
maning sambale
emmanuel.sambale at gmail.com
Thu Jun 19 03:05:14 PDT 2008
Hi,
I am using qgis for editing attributes of a grass vector. The other
layers loaded are 3 GRASS rgb images, a shapefile.
Zoom, pan and saving seems painstakingsly sloow. After editing a few
attributes I make it a point to save, but it takes a minute or two.
v.info of the vector
|----------------------------------------------------------------------------|
| Type of Map: vector (level: 2) |
| |
| Number of points: 0 Number of areas: 1340 |
| Number of lines: 0 Number of islands: 1169 |
| Number of boundaries: 1722 Number of faces: 0 |
| Number of centroids: 676 Number of kernels: 0 |
| |
| Map is 3D: 0 |
| Number of dblinks: 1 |
| |
| Projection: x,y (zone 0) |
| N: 742824 S: 593797.5 |
| E: 800394 W: 650940 |
| |
| Digitization threshold: 0 |
| Comments: |
| |
+----------------------------------------------------------------------------+
While each grass raster has:
|----------------------------------------------------------------------------|
| |
| Type of Map: raster Number of Categories: 32767 |
| Data Type: CELL |
| Rows: 7518 |
| Columns: 8504 |
| Total Cells: 63933072 |
| Projection: UTM (zone 51) |
| N: 746814 S: 532551 Res: 28.5 |
| E: 857451 W: 615087 Res: 28.5 |
| Range of data: min = 0 max = 32767 |
| |
I know these are quite big rasters to re-render, but on a P4 3.06GHz
with 1GB RAM and 2 GB swap is this "normal"?
My CPU runs at 80-90% percent just doing this.
cheers,
maning
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