[postgis-users] Computing overall trend presented by a 3D line

Shaozhong SHI shishaozhong at gmail.com
Mon Jan 10 15:56:48 PST 2022

3D lines can be used to delineated natural phenomena.  There are various
ways to compute the overall trend of a 3D line to determine whether the
line is running downward or upwards.

What are the best ways to compute this in PostGIS?


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