sbox functions
#The functions
sw( | box); |
sbox box;ne( | box); |
sbox box;se( | box); |
sbox box;nw( | box); |
sbox box;return the corresponding southwest, northeast, southeast, or northwest edge. The returned value will be a spherical point.
Example 6.21. The southwest edge of a box
sql> SELECT sw ( sbox '( (0d,0d), (90d,0d) )' ) ;