fathom, plan, scheme, measure
測 centers on determining extent or depth: measuring, fathoming, or planning by assessing a situation. The scheme sense is a natural extension of measuring out a plan.
測 combines 氵 (water) with 則, which likely contributes the sound and the idea of a standard or rule. The original sense may relate to measuring water depth.
Water 氵 is used with a rule 則 to measure depth. Picture a ruler dipped into water to fathom how deep it is.
For ソク, imagine a sock used as a measuring tool: sock -> ソク, and you stretch the sock to measure the water depth.
prediction; estimation
observation; survey; measurement
guess; conjecture
measurement
measuring; measurement
guess; speculation; supposition
measurement; surveying
unexpected; unforeseen; accidental
survey; actual measurements
weather measurement station
positioning; measurement of position
photometry
eye measurement; measure with eye
geodetic survey
meteorological observation
online instrumentation package
corona observatory
traverse survey
Raman spectroscopy; Raman spectrometry
triangulation