I'm trying to export a PNG of the OS 250k raster with OS Open Rivers over the top. Trying to export the entirety of the national grid caused it to crash, so I tried again with the bottom half of Great Britain and it's still crashing.

Here's the crash report:

Crash ID: 1d5ed672dc1b64fc24118b59e560969ad8cbd8bb

Stack Trace

QVectorPath::convertToPainterPath : QVectorPath::convertToPainterPath : QVectorPath::convertToPainterPath : QVectorPath::convertToPainterPath : QRasterPaintEngine::fillRect : QRasterPaintEngine::drawImage : QgsRasterDrawer::drawImage qgsrasterdrawer.cpp:174 QgsRasterDrawer::draw qgsrasterdrawer.cpp:105 QgsRasterLayerRenderer::render qgsrasterlayerrenderer.cpp:274 QgsMapRendererCustomPainterJob::doRender qgsmaprenderercustompainterjob.cpp:312 QgsMapRendererCustomPainterJob::renderPrepared qgsmaprenderercustompainterjob.cpp:233 QgsMapRendererTask::run qgsmaprenderertask.cpp:240 QgsTask::start qgstaskmanager.cpp:78 QThreadPoolPrivate::reset : QThread::start : BaseThreadInitThunk : RtlUserThreadStart :

QGIS Info QGIS Version: 3.10.14-A Coru�a QGIS code revision: 8374282d2a Compiled against Qt: 5.11.2 Running against Qt: 5.11.2 Compiled against GDAL: 3.1.4 Running against GDAL: 3.1.4

System Info CPU Type: x86_64 Kernel Type: winnt Kernel Version: 10.0.19042

The size of the image is 24000 * 20000 pixels at 1:250k resolution and 254 dpi (I found that 254 worked for a 16000 * 12000 file in terms of getting it to fit the canvas properly, but I don't know if it works for this size).

I have 32 GB of RAM, so should this work?

1 Answer 1


I'm afraid I'm no wiser from the error message.

However, the part of QGIS optimized for large-size output generation are layouts. I have not attempted to output an image of your size, but I routinely generate a 10240x7168 georeferenced tif file via Layout / Export as image or as part of an atlas. And I have had QGIS crash on me when accidentally trying to export an image with a 30000+- pixel dimension from the canvas, as the result of a typo on my side.

So I'd suggest setting up a very simple layout with the layers, dpi, and extent you want, no margins, and export that (georeferenced) and see if it helps.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.