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List:       postgis-users
Subject:    RE: pgr_alphashape is returning a geometry collection?
From:       Dapeng Wang <wangdapeng20191008 () gmail ! com>
Date:       2024-02-18 2:02:14
Message-ID: CAKx0Yhz4-YT-6NU63848rmeaLTt7dogmCgi7o_8r4wgAmLO+ug () mail ! gmail ! com
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I think this is correct, your query statement is 'SELECT
pgr_alphaShape((st_collect(v.the_geom))) as geom FROM ways_vertices_pgr as
v, result as r WHERE r.node = v.id;'.
The return value of the pgr_alphaShape function is a GEOMETRY COLLECTION.

For reference, please seehttps://
docs.pgrouting.org/3.6/en/pgr_alphaShape.html.

Sorry, I went through a long vacation.

[Attachment #3 (text/html)]

<div dir="ltr">I think this is correct, your query statement is &#39;SELECT \
pgr_alphaShape((st_collect(v.the_geom))) as geom FROM ways_vertices_pgr as v, result \
as r WHERE r.node = <a href="http://v.id">v.id</a>;&#39;.<br>The return value of the \
pgr_alphaShape function is a GEOMETRY COLLECTION.<br><br>For reference, please \
seehttps://<a href="http://docs.pgrouting.org/3.6/en/pgr_alphaShape.html">docs.pgrouting.org/3.6/en/pgr_alphaShape.html</a>. \
<div><br><div>Sorry, I went through a long vacation.<br></div></div></div>



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