[postgis-users] Get concave hull from an array of longitude in latitude points

[Aleš Kecman]

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longitude;latitude

14.4748633596;46.0878254619
14.4763518858;46.08903795
14.4818432078;46.0881362379
14.4820886727;46.0867787345
14.4819582754;46.0868951105
14.4829486102;46.0874664345
14.4825109958;46.0872485151
14.482238313;46.0859876362
14.4867016967;46.082948631
14.4880592792;46.0829547196
14.4811801222;46.0885201205
14.4814057611;46.0879003201
14.480595963;46.0887603988
14.4796438292;46.0882522106
14.4800623417;46.0877502577
14.4809601134;46.0871605059
14.4866553199;46.082372585
14.4861897845;46.0823794907
14.4859485352;46.0832961472
14.4851890461;46.0829328304
14.4846191494;46.0830382317
14.484966568;46.083219747
14.484826973;46.0843258057
14.4841620095;46.08353103
14.4854708637;46.0846076273
14.4841742002;46.0849976711
14.4836219952;46.084590292
14.484097376;46.0849163473
14.4845219648;46.0851431994
14.4844437989;46.0852058291
14.4843786465;46.0852595199
14.4840787429;46.0855280904
14.4826033827;46.0856653808
14.4834094892;46.0865777702

----------------------------

convex polygon points: (created with PostGIS ST_ConvexHull function)

14.4866553199,46.082372585 14.4861897845,46.0823794907 14.4846191494,46.0830382317 14.4748633596,46.0878254619 14.4763518858,46.08903795 14.480595963,46.0887603988 14.4811801222,46.0885201205 14.4818432078,46.0881362379 14.4829486102,46.0874664345 14.4880592792,46.0829547196 14.4866553199,46.082372585

concave polygon points: (created online: http://local.dsi.uminho.pt:8080/webMathematica/ConcaveHull/index.html)

14.4866553199,46.082372585 14.4880592792,46.08295471959999 14.4854708637,46.0846076273 14.4843786465,46.08525951989999 14.4840787429,46.08552809039999 14.4834094892,46.0865777702
 14.48294861019999,46.0874664345 14.4818432078,46.0881362379 14.4811801222,46.0885201205 14.480595963,46.08876039879999 14.4796438292,46.08825221059999 14.4763518858,46.08903794999999
 14.4748633596,46.0878254619 14.482238313,46.0859876362 14.4836219952,46.084590292 14.4841620095,46.08353103 14.4846191494,46.0830382317 14.4861897845,46.08237949069999 14.4866553199,46.082372585
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