Bug report #9349
QGis Zonal Statistics Plugin NoData included in Calculations
| Status: | Closed | ||
|---|---|---|---|
| Priority: | High | ||
| Assignee: | - | ||
| Category: | C++ Plugins | ||
| Affected QGIS version: | master | Regression?: | No |
| Operating System: | Easy fix?: | No | |
| Pull Request or Patch supplied: | No | Resolution: | fixed/implemented |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 17951 |
Description
I have an ESRI raster file (w001001.adf) with a NoData value of -32768 and otherwise non-negative data. I have a vector value of polygons. When I use the built-in Zonal Statistics Plugin, many of the returned results are negative. Some of the negative values are -32768, which i understand to mean that there was no raster data in the particular polygon. However, many of the negative values are not equal to -32768, which implies that the NoData value of -32768 is counted with the non-negative data values when Zonal Statistics is used. Attached is both the raster and vector data. Note in the vector data attributes I have already applied Zonal Statistics and saved new columns as prc7count, prc7sum and prc7mean.
Related issues
History
#1
Updated by Jason Tokayer almost 11 years ago
Could not upload the files due to size limitations
#2
Updated by Paolo Cavallini almost 11 years ago
Why not adding a very small portion of the raster?
#3
Updated by Jürgen Fischer almost 11 years ago
- Status changed from Open to Feedback
#4
Updated by Giovanni Manghi almost 11 years ago
- Target version set to Version 2.2
- Affected QGIS version changed from 2.0.1 to master
I can confirm the issue, and probably is also the same cause of this #9151
#5
Updated by Giovanni Manghi over 10 years ago
- Resolution set to fixed/implemented
- Status changed from Feedback to Closed