[postgis-tickets] [PostGIS] #3709: Allow signed distance for ST_Project

PostGIS trac at osgeo.org
Mon Feb 13 03:58:12 PST 2017


#3709: Allow signed distance for ST_Project
---------------------+---------------------------
 Reporter:  komzpa   |      Owner:  pramsey
     Type:  defect   |     Status:  new
 Priority:  medium   |  Milestone:  PostGIS 2.3.3
Component:  postgis  |    Version:  2.3.x
 Keywords:           |
---------------------+---------------------------
 ST_Project now falls with

 ERROR:  XX000: Distance must be between 0 and 2.00151e+07

 when passed distance is negative.

 for cases when you have just speed, time delta and heading and would like
 to calculate position along the path line that corresponds to this point,
 it breaks on negative time deltas.

 This can be implemented as adding 180 degrees to the angle and taking
 abs(distance).

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3709>
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