On Fri, Sep 30, 2016 at 06:34:57PM +0000, Erika Callagon wrote: > I've been working on VSI data, and I'm wondering if there is a way to > change the units displayed (which is by default in m, at least for my data) > to nm. Changing the color scale and doing a 'fix mean zero' changes the > units to microns, but with only one decimal place. I'm trying to measure > nm-level height changes, but the data is not displayed up to this precision > (the original data contains this information).
The information definitely is not lost in Gwyddion as it represents everything in double precision internally (about 16 significant digits). The colour scale generally covers the entire data range so the precision of values displayed there is just sufficient to distinguish the dozen tick marks displayed. It serves for orientation, not for value reading to many significant digits. As for reading, in value reading, distance, ... tools, values are typically displayed with 4 digits (and exported with an extra one). So you have 10-micron range data and need to read sub-nanometer differences? Yeti ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Gwyddion-users mailing list Gwyddion-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gwyddion-users
