I am using QGIS for vectorising some small-scale maps from a historical atlas. The maps are provided as JPEG images 3703 x 4718 ranging roughly from 5 to 9 MB in size. All georeferenced tiff images are roughly from 40 to 100 MB. But one. One of the maps, which is by no means remarkable and processed in exactly the same manner as the others results in a 5+ GB TIFF file which is nearly unmanageable.
What may be the cause of that?
Software details: QGIS 3.4.2-Madeira under Ubuntu 16.04.
Source image is imported as: "Unknown datum based on Bessel 1841 ellipsoid".
Transformation settings are: "Transformation type: Thin Plate Spline / Resampling method : Cubic / Target SRS: EPSG:4326 - WGS 84 / Compression: none"