[postgis-devel] [PostGIS] #312: ST_ConcaveHull

[PostGIS]

#312: ST_ConcaveHull
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 Reporter:  robe         |       Owner:  robe         
     Type:  enhancement  |      Status:  assigned     
 Priority:  medium       |   Milestone:  PostGIS 2.0.0
Component:  postgis      |     Version:               
 Keywords:               |  
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Comment(by etiennebr):

 I must say it's a really nice feature. Though, I don't know, shouldn't it
 be called
 [http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Alpha_shapes_2/Chapter_main.html|
 alpha shape] or alpha hull ? Or maybe add a reference to it in the doc. Is
 the difference coming from the way the dimensions of the gap are specified
 ? As in alpha shape you use alpha directly as a way to specify the minimal
 gap between two points, while in the present function I understand it is
 specified in percent of the window size. (In fact, it's not really clear
 to me how the target percent is used even after looking at the examples.
 Can you deduce the distance between points with the target percent ?)

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/312#comment:5>
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