olemus
skaala andmeväärtuste määramispiirkonna tüüp
= the domain type of data values for the scale

ülevaateid
https://en.wikipedia.org/wiki/Level_of_measurement

https://forms.app/en/blog/guide-to-measurement-scales

https://dataliteracy.com/courses/data-literacy-level-1/lessons/principles-of-visual-cognition/topic/1-2-a-review-of-data-scale-types/

https://www.formpl.us/blog/measurement-scale-type