I have a raster file (PNG) georeferenced with PGW world file. The file was created in British National Grid EPSG 27700.
The recipient requires the file in WGS84 EPSG 4326, and has no re-projection facilities.
I thought I could easily reproject the file in QGIS - by changing both the project CRS and layer CRS to EPSG 4326, and re-exporting.
I've had a look at this post on how to export a TIFF with .tfw from QGIS, and have done this successfully. (And I know that world files can easily swap formats between PNG/TIFF (pgw/tfw) by amending the file extension, so I can translate this from tfw to pgw with no issues.)
However - when I interrogate the resulting world file, the co-ordinates still appear to be EPSG 27700 format co-ordinates. The recipient needs the file to show these in EPSG 4326.
Do I need to translate these manually in text edit? Is there an easy way to re-project world files between co-ordinate systems?