horizontal, woof, left & right, (parallels of) latitude, prediction
緯 centers on the horizontal dimension in weaving and geography: the woof threads that run left and right across the loom, and by extension the parallels of latitude that circle the globe horizontally. The prediction sense is a separate, less common application.
緯 combines 糸 (thread) with 韋, which likely contributes the sound and the idea of something that goes around or encircles, referring to the horizontal woof threads that cross the warp.
The thread radical 糸 on the left and 韋 on the right suggest threads running horizontally across a loom. Picture the woof threads being woven left and right, like latitude lines circling the earth.
For イ, imagine an eagle (イーグル) flying horizontally along a latitude line: the first sound イ cues the reading while the bird traces a horizontal path.
details; particulars; sequence of events; circumstances; situation; how things got this way
north latitude
latitude
southern latitude
high latitudes
mid-latitudes
subtropical high-pressure belt; subtropical ridge; subtropical high; horse latitudes
Japan Geodetic Datum
warp and weft; warp and woof
theodolite
longitude and latitude
standard datum of geographic coordinates; point of origin of longitude and latitude; geodetic datum
graticule
latitude variation
latitude observatory
book of omens appended to Confucian Chinese classics
parallel; latitude line
latitude
declination
features (e.g. of a product)