Opened 15 years ago
Closed 15 years ago
#2634 closed defect (fixed)
gdal_sieve not weeding out all polygons
| Reported by: | ysiddiqui | Owned by: | warmerdam |
|---|---|---|---|
| Priority: | normal | Milestone: | 1.6.0 |
| Component: | Utilities | Version: | svn-trunk |
| Severity: | normal | Keywords: | sieve |
| Cc: |
Description
Using gdal_sieve.py dated 10/9/2008 produces an unexpected result when trying to weed out small polygons from a salt-and-pepper image of 0s and 1s. Many polygons got removed, but others only got partially removed, and they were much smaller than the threshhold size. The command used was as follows:
python C:\apps\OSGEO4W\apps\gdal-dev\bin\gdal_sieve.py -st 1120 -8 sieve_input.tif -of GTiff sieve_output.tif
The same results occur if the output file is not specified and the results overwrite the input data.
Inputs and outputs are attached.
Attachments (2)
Change History (4)
by , 15 years ago
| Attachment: | sieve_input.zip added |
|---|
comment:1 by , 15 years ago
| Component: | default → Utilities |
|---|---|
| Keywords: | sieve added |
| Milestone: | → 1.6.0 |
| Status: | new → assigned |
| Version: | 1.5.2 → svn-trunk |
Yusuf,
I have confirmed this. There are situations in which polygons are not filtered out because it is not possible to identify a reasonable neighbour to merge them into but this does not appear to be the issue with this file. So there is some additional bug in play.
comment:2 by , 15 years ago
| Resolution: | → fixed |
|---|---|
| Status: | assigned → closed |
Input to sieve program