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I want to export/save a QGIS composition of raster/vector layers to a GEOTIFF or ECW raster with high resolution (20 000 * 20 000 Pixel).

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Jim12 can you use the same account for answering your own questions. There are two Jim12 accounts from Switzerland. They should be merged. –  Mapperz Sep 19 '12 at 13:18
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4 Answers 4

Save a complete QGIS project, rasters and vectors, to a high-resolution GeoTIFF? I don't think you can do this (at present). What you can do is export high-res images from the print composer and then georeference them.

See this feature request: http://hub.qgis.org/issues/5840

Nick.

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There have been several requests for this feature (including mine on the old qgis forum in 2011 or so). Some of us use applications which use high-res georeferenced images as basemaps. It looks like it has been proposed and coded as a patch to 2.1: hub.qgis.org/issues/6985 –  scruss Jul 31 '13 at 18:48
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If you save the map canvas to a tif file, it will automagically be georeferenced. (A new, amazing feature in QGIS...). The resolution however will be the computer screen resolution. (96 dpi). So probably no more than 1900X1200 pixels.

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I resolved the problem by applying MapServer's Shp2img.exe repeaetadly.

MapServer is able to render a qGis project, if the project gets first exported by the standard MapServer plugin to a *.map file. Subsequently it is possible to render the project to a image file (png, jpg, tif). Unfortunately there is a limit of - lets say more or less - 10000*10000 pixel.

But by writting some programming code, it is possible to manipulate the content of the *.map file and apply sequently the shp2img.exe to single tiles of the qGis project. In the last steps the single tile images can be merged using gdalbuildvrt and gdal_translate. As output an ECW or a GEOTIFF of huge size can be produced. I wrote a small tool to automatize the process and I could export a qGis view to ECW rasters with 100'000 * 100'000 pixel! I guess there is no restriction with higher resoulutions.

As precondition FWTools2.4.7 must be installed. FWTools2.4.7 contans MapServer and GDAL with ECW output support.

I wonder why the rester export of qGis views is not a standard feature of qGis... Is it really only me who wants to export a qGis view to a well used raster format (like ECW or GEOTIFF)???

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You can use GeoPapatile plugin then use the "image.tif" output.

It is a tif with a tfw file, so it is georeferenced.

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Could you add some more information about this plugin, maybe a link? –  Paul Jul 17 at 20:17
    
And if you are a developer or otherwise connected with this plugin be sure to disclose that in your answer too. –  PolyGeo Jul 17 at 21:33
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