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jts_discussion · JTS Topology Suite

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  • Members: 216
  • Category: Open Source
  • Founded: Feb 20, 2002
  • Language: English
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Hi there, I'm using JTS to perform unions on groups of 50-70 overlapping polygons in a java font editing experiment. The polygons themselves are relatively...
10 Jul 21, 2003
1:16 pm

José Ramón Me...
jose_ramon_m...
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Well, after some investigation it looks like you might have hit a actual robustness failure within JTS. Remember, the algorithms used for the boolean...
1 Jul 17, 2003
6:58 pm

Martin Davis
mbdavis@...
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Thanx but now i have the same pb with this two following polygons : P1 POLYGON ((1600 0.4, 1600 0.48, 1651 0.48, 1651 0.5, 1700 0.5, 1700 0.56, 1750 0.56, 1750...
1 Jul 17, 2003
3:42 pm

modenait3550
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Hello, I use the jts pakage but I ve the following problem : com.vividsolutions.jts.geom.TopologyException: side location conflict [ (600.0, 0.5, NaN) ] while...
2 Jul 16, 2003
3:45 pm

Martin Davis
mbdavis@...
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JTS'ers: You may be interested in checking out the following new products from the same team that brought you JTS: JUMP - the Unified Mapping Platform An...
2 Jun 29, 2003
11:02 am

Cameron Shorter
cameronshorter
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Hi. Yesterday I knew release of JUMP from an article(http://www.digitalearth.org/story/2003/6/26/132356/173). I tried JUMP(http://www.vividsolutions.com/jump/)...
2 Jun 27, 2003
4:01 pm

Martin Davis
mbdavis@...
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Hi all, I am using the GeoServer for saving GPS data into a PostGIS Database. All is installed on a Win2K Server Machine. My problem comes when GeoServer...
6 Jun 26, 2003
12:30 pm

Andreas Jaeger
sergeantpluck
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Hi! Im a new member, and we´re using JTS 1.2 for two months. I think its a great tool, but Ive found a problem when we try to intersect two polygons. I...
3 Jun 11, 2003
4:11 pm

David Blasby
dblasby@...
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I have a very basic question. How do I use JTS to find the upper left coordinate in a 4 point polygon? Thanks, Mark...
3 Jun 9, 2003
8:46 pm

Martin Davis
mbdavis@...
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Is the source for the test builder available? It is an extremely useful tool. I would like to be able to be able to plot a target set of geometries and have...
5 Jun 9, 2003
5:43 pm

Martin Davis
mbdavis@...
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Are there plans to fix the link to the API docs on vividsolutions.com for JTS? Not sure if it is known that the link doesn't work or not. Thanks Laine...
3 May 27, 2003
9:17 pm

Martin Davis
mbdavis@...
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Are there any working examples out there? I'm learning how to use JTS and I think there must be better ways to implement some functions I'm working on. Thanks...
2 May 27, 2003
5:15 pm

Martin Davis
mbdavis@...
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I am new to JTS and have been working through the concepts via the example provided and several that I have developed on my own. However, I am not 100% sure...
7 May 21, 2003
9:43 pm

David Blasby
dblasby@...
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The following snippet was working ok with jts 1.2: public static void cornerPoligon() throws ParseException { String wktA = "POLYGON((10 10, 10 20, 20 20, 20...
2 May 21, 2003
9:38 pm

Martin Davis
mbdavis@...
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Aha! ... From: Martin Davis [mailto:mbdavis@...] Sent: 20. maj 2003 16:56 To: jts_discussion@... Subject: RE: [jts_discussion] Newbie...
1 May 21, 2003
8:04 am

Aron Olsen
aronolsen
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In JTS 1.2 and 1.3, i noticed a discrepancy between the comments of the Coordinate.equals(Object o) method (the routine ignores the z...) and what it really...
2 May 15, 2003
10:47 pm

Martin Davis
mbdavis@...
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Hello I am quite new to JTS so excuse me if this question is stupid or answered elsewhere - I did have a look at the archives. I have populated an array of...
2 May 6, 2003
6:44 pm

Martin Davis
mbdavis@...
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import com.vividsolutions.jts.geom.*; public class InitEnvelopeTest { public static void main(String[] args) { Envelope nullEnvelope1 = new Envelope(); ...
2 Apr 28, 2003
5:25 pm

Martin Davis
mbdavis@...
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Hi, The result of union operation over 2 connected LineString is a MultiLineString. I suppose this is conform to the SFS (?), but how can i get a single ...
2 Apr 25, 2003
4:28 pm

Martin Davis
mbdavis@...
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To all JTS users: We have changed the official name of the JTS API to the "JTS Topology Suite". This avoids potential trademark infringement issues with Sun...
2 Apr 24, 2003
12:02 am

Sondheim, Mark SRM:EX
Mark.Sondheim@...
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Hi, I have a simple question here. According to JTS spec, JTS conforms to the Simple Features Specification for SQL. From the spec of JTS, spatial data I/O in...
2 Apr 23, 2003
6:51 pm

Martin Davis
mbdavis@...
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[I'm cross-posting this to the JTS list, since it might be of general interest] Andrea, You're correct in noting that for repeated evaluation of an overlay...
3 Apr 15, 2003
7:16 pm

Andrea Aime
aaimeit
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Yep, that's the general idea. I guess the tricky part is specifying the dissolve (or union) operation in a flexible way. As Andrea pointed out, what he really...
2 Apr 14, 2003
7:13 pm

Paul Ramsey
pwramsey3
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In this case with these two polygons: POLYGON ((545 317, 617 379, 581 321, 545 317)). POLYGON ((484 290, 558 359, 543 309, 484 290)). when i try an union...
3 Apr 9, 2003
4:42 pm

Martin Davis
mbdavis@...
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Sorry if the question has already been asked but i'd like to know why jts raises some TopologyException like : -->found Null Directed edge. POLYGON...
2 Apr 9, 2003
4:29 pm

Martin Davis
mbdavis@...
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NOTE: PLEASE DIRECT ALL RESPONSE TO EMAIL ACCOUNT CONTAINED IN THIS LETTER FOR CONFIDENTIAL PURPOSE. STRICTLY CONFIDENTIAL FROM: Mr. Suleman Sese Seko TEL:...
1 Apr 8, 2003
10:48 pm

Mr. Suleman Sese Seko
sulemanseseseko@...
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Hi. I'll try to develop one module to union of buffered points. In the case buffered size was too small and buffering of points using this size resulted to...
2 Apr 8, 2003
8:30 pm

Martin Davis
mbdavis@...
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Try using RobustCGAlgorithms#computeOrientation. Use two points of the splitting line, and a point from one of the polygons. It might be best to use the...
4 Apr 8, 2003
7:32 pm

Hisaji Ono
hi_ono2001@...
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Hi, Do someone has any list of polygons examples that make TopologyException in jts1.2?...
2 Apr 8, 2003
4:00 pm

Martin Davis
mbdavis@...
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(Bonus - I can answer two questions at once here... ) cdlee, The polygons in your message are classic cases that will cause robustness problems: Large...
1 Apr 8, 2003
3:50 pm

Martin Davis
mbdavis@...
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