I used the georeferencer with QGIS 3.2 and I imported an image with the following EXIFS
ExifTool Version Number : 11.09
File Name :
Directory :
File Size : 660 MB
File Modification Date/Time : 2018:08:16 09:57:14+02:00
File Access Date/Time : 2018:08:16 09:56:50+02:00
File Creation Date/Time : 2018:08:13 15:02:00+02:00
File Permissions : rw-rw-rw-
File Type : TIFF
File Type Extension : tif
MIME Type : image/tiff
Exif Byte Order : Little-endian (Intel, II)
Image Width : 8213
Image Height : 8426
Bits Per Sample : 16 16 16 16 16
Compression : Uncompressed
Photometric Interpretation : BlackIsZero
Strip Offsets : (Binary data 82908 bytes, use -b option to extract)
Samples Per Pixel : 5
Rows Per Strip : 1
Strip Byte Counts : (Binary data 50555 bytes, use -b option to extract)
Planar Configuration : Chunky
Extra Samples : Unknown (0 0 0 0)
Sample Format : Unsigned; Unsigned; Unsigned; Unsigned; 1
Pixel Scale : 0.0995571757896536 0.0995571757896668 0
Model Tie Point : 0 0 0 671039.99110524 6670610.39921535 0
GDAL No Data : 0
Geo Tiff Version : 1.1.0
GT Model Type : Projected
GT Raster Type : Pixel Is Area
GT Citation : RGF93 / Lambert-93
Geog Citation : RGF93
Geog Angular Units : Angular Degree
Geog To WGS84 : 0 0 0
Projected CS Type : Unknown (2154)
Proj Linear Units : Linear Meter
Image Size : 8213x8426
Megapixels : 69.2
-- press RETURN --
The CRS is RGF93 as expected, the I georeferenced it using QGIS 3.2 raster georeferencer and specifying RGF93 as output CRS and I get those EXIFS on the output image
ExifTool Version Number : 11.09
File Name :
Directory :
File Size : 660 MB
File Modification Date/Time : 2018:08:16 10:29:24+02:00
File Access Date/Time : 2018:08:16 10:29:16+02:00
File Creation Date/Time : 2018:08:16 10:29:16+02:00
File Permissions : rw-rw-rw-
File Type : TIFF
File Type Extension : tif
MIME Type : image/tiff
Exif Byte Order : Little-endian (Intel, II)
Image Width : 8195
Image Height : 8443
Bits Per Sample : 16 16 16 16 16
Compression : Uncompressed
Photometric Interpretation : BlackIsZero
Strip Offsets : (Binary data 83074 bytes, use -b option to extract)
Samples Per Pixel : 5
Rows Per Strip : 1
Strip Byte Counts : (Binary data 50657 bytes, use -b option to extract)
Planar Configuration : Chunky
Extra Samples : Unknown (0 0 0 0)
Sample Format : Unsigned; Unsigned; Unsigned; Unsigned; 1
Pixel Scale : 0.100054163708167 0.100054163708167 0
Model Tie Point : 0 0 0 671039.531463217 6670614.55702631 0
GDAL No Data : 0
Geo Tiff Version : 1.1.0
GT Model Type : Projected
GT Raster Type : Pixel Is Area
GT Citation : unnamed
Geographic Type : User Defined
Geog Citation : GCS Name = GRS 1980(IUGG, 1980)|Datum = unknown|Ellipsoid = GRS80|Primem = Greenwich| Geog Geodetic Datum : User Defined
Geog Angular Units : Angular Degree
Geog Ellipsoid : User Defined
Geog Semi Major Axis : 6378137
Geog Inv Flattening : 298.257222101
Geog Prime Meridian Long : 0
Geog To WGS84 : 0 0 0
Projected CS Type : User Defined
Projection : User Defined
Proj Coord Trans : Lambert Conf Conic 2SP
Proj Linear Units : Linear Meter
Proj Std Parallel 1 : 49
Proj Std Parallel 2 : 44
Proj False Origin Long : 3
Proj False Origin Lat : 46.5
Proj False Origin Easting : 700000
Proj False Origin Northing : 6600000
Image Size : 8195x8443
Megapixels : 69.2
-- press RETURN --
They are not the same at all and I don't get any mention of the EPSG:2154 CRS, why is that ? I already had the problem with QGIS 2.18. Is there a way to prevent this ?
gdal_translate -of GTiff -a_srs EPSG:2154 input.tif output.tif. If it works I can suggest better way to do it with gdal_edit.