The layers show geo-referenced data, not fix images, so the screen display is always done directly from the data and interactive probing using the mouse is giving the values of the original data, not a scale extracted one. The data are stored in native format, rather than stored in a common internal format, avoiding degradation in zooms and always keeping the full details and resolution of the original data.
The layers display georeferenced data, not fixed images, so the screen display is always derived directly from the data and interactive probing using the mouse provides the values of the original data, not a scaled value extracted one. The data are stored in their native format, rather than being stored in a common internal format, avoiding degradation during zooms and always preserving the full details and resolution of the original data.