Opened 7 years ago

Closed 7 years ago

#7075 closed defect (fixed)

gdalwarp: destination nodata implictly set if source has, but even when -dstalpha is specified

Reported by: Even Rouault Owned by: warmerdam
Priority: normal Milestone: 2.3.0
Component: default Version: unspecified
Severity: normal Keywords:
Cc:

Description

See ​https://lists.osgeo.org/pipermail/gdal-dev/2017-October/047320.html

gdalwarp recopies implictly the source nodata value to the target dataset, even if -dstalpha is specified. Having both nodata and alpha is confusing.

It appears that the current behaviour is a unintented side effect of a GDAL 1.11.0 change: 

* gdalwarp: copy nodata values from source to dest if -dstnodata is not given ; add option to not set dest nodata with -dstnodata None (#5087)

Change History (1)

comment:1 by Even Rouault, 7 years ago

Resolution: → fixed
Status: new → closed

In 40347:

gdalwarp: do not set implicitly nodata on destination dataset when -dstalpha is specified (fixes #7075)

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