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

[Shaozhong SHI]

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?

Regards,

David
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/postgis-users/attachments/20220110/39b61815/attachment.html>