Changes between Initial Version and Version 1 of Ticket #982, comment 14


Ignore:
Timestamp:
Aug 25, 2019, 12:16:49 PM (4 years ago)
Author:
tsw

Legend:

Unmodified
Added
Removed
Modified

  • Ticket #982, comment 14

    initial v1  
    33As I don't understand the underlying algorithm however I'll point out a few things. If you run the test ST_Concavehull query as it currently stands in PostGIS and GEOS and buffer the lines by 10 meters, it is still never completes. I'm not sure that indicates a GEOS problem or not.
    44
    5 Manipulating the _st_concavehull code to remove UnaryUnion fixes the performance but then not everything is encapsulated by the hull.
     5Manipulating the _st_concavehull code to remove ST_UnaryUnion fixes the performance but then not everything is encapsulated by the hull.
    66
    77I'll leave it to you folks to determine the cause and the fix, but wanted to provide as much information as possible to help diagnose the cause.