[postgis-tickets] [PostGIS] #4690: Line Clipping MVT failure?

PostGIS trac at osgeo.org
Tue Oct 18 12:28:00 PDT 2022


#4690: Line Clipping MVT failure?
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  Reporter:  pramsey  |      Owner:  Algunenano
      Type:  defect   |     Status:  assigned
  Priority:  medium   |  Milestone:  PostGIS GEOS
 Component:  postgis  |    Version:  master
Resolution:           |   Keywords:
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Comment (by cbird):

 Hi, I'm running into this issue (I think) now, with LINESTRING Z features.
 I generate MVTs dynamically for an application. Somewhat randomly, some
 lines disappear at different zoom levels. The error is:
 SQL Error [XX000]: ERROR: lwcollection_construct: mixed dimension
 geometries: 2/0.

 ST_Force2D seems to fix this problem, but at a steep cost in time to
 generate MVTs.

 Is this still a known problem? Thanks!

 PostgreSQL 13.7 on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu
 7.5.0-3ubuntu1~18.04) 7.5.0, 64-bit
 POSTGIS="3.2.0 0" [EXTENSION] PGSQL="130" GEOS="3.9.2-CAPI-1.14.3"
 PROJ="Rel. 4.9.3, 15 August 2016" LIBXML="2.9.4" LIBJSON="0.12.1"
 LIBPROTOBUF="1.2.1" WAGYU="0.5.0 (Internal)"
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4690#comment:11>
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