Opened 13 years ago

Last modified 12 years ago

#1206 closed defect

ST_Node — at Version 6

Reported by: strk Owned by: strk
Priority: medium Milestone: PostGIS 2.0.0
Component: postgis Version: master
Keywords: history Cc:

Description (last modified by strk)

A function taking a collection of lineal geometries and performing noding on them. There's a known trick of doing this with ST_Union, but the result is often over-splitted so takes an additional ST_LineMerge to do.

Eventually, having a separate entry point will allow further optimizing or extending it.

Change History (6)

comment:2 by strk, 13 years ago

Input can be both, output will be multi (one component per edge)

in reply to:  2 comment:3 by aperi2007, 13 years ago

Replying to strk:

Input can be both, output will be multi (one component per edge)

ok, I guess to node could be use the ST_Split() but it don't work with MultiLinestrings.

comment:4 by strk, 12 years ago

See ​http://sourceforge.net/mailarchive/forum.php?thread_name=4EAEC523.6090301%40telus.net&forum_name=jts-topo-suite-user about the ST_Union trick limitation (meaning: future releases of JTS/GEOS might change to support what we need).

comment:5 by strk, 12 years ago

Milestone: PostGIS Future → PostGIS 2.0.0
Owner: changed from pramsey to strk
Status: new → assigned
Summary: ST_Node or ST_NodeLines → ST_Node

I'm on it

comment:6 by strk, 12 years ago

Description: modified (diff)
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