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Using QGIS, you can load the shapefile as a new layer, and Set CRS for Layer to EPSG:7405 (or better EPSG:27700). Then use Save As... to save it to another filename and EPSG:4326. Alternatively, GDAL ogr2ogr is the right tool for you. ogr2ogr -t_srs epsg:4326 -s_srs epsg:27700 dst_datasource_name src_datasource_name should deliver the data you want, ...


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You can create a local CRS with an oblique mercator projection, and transform the data with gdalwarp and gdal_translate into it. See my advice here: Using customized Coordinate System for Archaeological site data This should work with 16-bit or grayscale data the same way. Paletted colours shoud be expanded to RGBA in advance. UPDATE Using QGIS, ...


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Using QGIS 2.6.1 (and probably some previous versions as well) Go to "Processing toolbox" and search for "Reproject layer" under QGIS geoalgorithms, Select the tool and right click to open contextual menu, Select the "Ëxecute as batch process" option Select each one of your "input layer", "Target CRS" and "Reprojected layer name" Click ...


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Rather simple method is to write a new world file (.tfw) which contains rotation parameters. You can make such with OpenOffice Calc, for example. If you have a GeoTIFF file which contains reoreferencing info as stored into the image tag you must clear the geotiff tags and create a baseline tiff to start with. It can be done with gdal_translate: ...


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If you have GDAL, you can reproject the png with: galwarp -s_srs epsg:28992 -t_srs epsg:4326 source.png dest.tif If you want a png file as result, you have to use gdal_translate in a second step: gdal_translate -of PNG test.tif dest.tif dest.png



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