Must geomantic omen be regarded as divination?

There is a sect in geomantic omen called Kong Xuanda Gua, which means divination, so you can see some compasses, especially those of Sanyuanzong, with a circle on them, which is the Sixty-four Gua of the Book of Changes. Another example is the nine planets method, that is, when you make a geomantic array, you have to get divination. There are also some responsible feng shui teachers who will do a daily lesson before watching feng shui, that is, divination.

Not to mention geomantic omen, even Chinese medicine practitioners have to divine when solving intractable diseases. After liberation, the six-hexagram technique was denounced as superstition, so when they studied Chinese medicine, they did not study six hexagrams alone.

Due to well-known reasons, the inheritance of China's traditional culture is fragmented, so we seldom see geomantic omen and divination now, but there are some in many ancient books.

I wonder if this answer has solved your problem.