asbinary - POINTM
:memory: #use in-memory database
SELECT Hex(AsBinary(GeomFromText("POINTM(1 2 3)", 4326)))
1 # rows (not including the header row)
1 # columns
Hex(AsBinary(GeomFromText("POINTM(1 2 3)", 4326)))
01D1070000000000000000F03F00000000000000400000000000000840