On Sun, 27 Jul 2025, Peter Bennewitz via gdal-dev wrote:

Dear all,

Overall, I'm trying to convert ESRI SHAPE data, given in "Web Mercator" EPSG:3857 , to a TIF in   ETRS89 / UTM Zone 32U , EPSG:25832 .

The GDAL Version is the one included in current stable Debian, https://packages.debian.org/bookworm/gdal-bin ,  gdal-bin (3.6.2+dfsg-1 and others)

The first step, rasterization, works flawless:
    gdal_rasterize -a_srs EPSG:3857 -tr 10 10 -burn 1 q.shp q.tif
        ...             ...
However, running the TIF through gdalwarp, and checking the result with gdalinfo, does not show a plausible bounding box:

  gdalwarp  -s_srs EPSG:3857 -t_srs EPSG:25832 q.tif w.tif

Not really answering your question but why are you
rasterizing and then warping ?
I would use ogr2ogr to convert srs and then rasterize:
     ogr2ogr -s_srs EPSG:3857 -t_srs EPSG:25832 w.shp q.shp
     gdal_rasterize -tr 10 10 -burn 1 w.shp w.tif

Note that  ogr2ogr is <dst_dataset_name> <src_dataset_name>
but gdal_rasterize is <src_datasource> <dst_filename>
 - ie the reverse order.

If the source is properly geolocated,
the "-s_srs EPSG:3857" in the ogr2ogr command is optional.

--
Andrew C. Aitchison                      Kendal, UK
                   and...@aitchison.me.uk
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