Hi, Lähettäjä: Michaël Michaud [mailto:m.michael.mich...@orange.fr] Lähetetty: 10. joulukuuta 2015 0:28 Vastaanottaja: jump-pilot-devel@lists.sourceforge.net Aihe: Re: [JPP-Devel] Add some JTS functions before next release?
Hi, Some functions seems interesting enough. For some others, I would need real use case to motivate me. For translate/scale function, I think we already have good tooling with interactive move/scale tools in the toolbox and affine transform in the menu. Any think you can't do with that ? Not really. None of the tools can move geometries quickly close to origin but I do not know a use case for that. Perhaps demonstrating how different projections make different distortions? I don't know any usage of octogonal envelope. Maybe used by JTS for internal algorithms. Neither do I. Create fractal geometries or random points/lines/polygons seems interesting to me (I mean I often have to create random data for testing purpose. A few years ago, I had created a koch curve of 1 000 000 points to test really big object). We can create random triangles and arrows but the number of features is fixed to 50 and 20. Random triangles tool creates also attributes of all kinds and therefore we must keep that tool. OpenJUMP can already extract points like TestBuilder (and more as it can introduce offset thanks to internal JTS API) ExtractLine would be a nice addition. "Repeat" option would suit well also for ExtractLine. Offset might be nice for visualizing data but option should have a warning text because it might alter the length of sections if the algorithm would be the same as in OffSet curve. -Jukka- Michaël Le 09/12/2015 21:53, Landon Blake a écrit : Jukka: On which JTS class do you find the scale function? How do we currently support polygon hole editing in OpenJUMP? Landon On Wed, Dec 9, 2015 at 6:37 AM, Rahkonen Jukka (MML) <jukka.rahko...@maanmittauslaitos.fi<mailto:jukka.rahko...@maanmittauslaitos.fi>> wrote: Hi Michaël, I have tried most functions which are available in JTS Testbuilder but it feels that there are not many that could be just added into OpenJUMP without making new user interface elements for using them. These three might be possible to add without new UI but I am not sure how useful they are for the users - TranslateCentreToOrigin - TranslateToOrigin - OctagonalEnvelope These functions feel interesting but they require some programming: - Scale - CreateFractalShape feels good for creating complex geometries for testing. - GetGeometryN and GetPolygonHoleN for editing and removing parts and holes from multigeometries and geometrycollections - should be topped up with UI button GetNext for selecting and panning to the next geometry/hole. - ExtractLine and ExtractPoint would be nice additions to linear referencing tools. Extract line tool could be improved a bit to accept also start distance for the extracted line (extract between 1 and 5 km) and count distance from the end of the linestring (extract the last km). I also feel that it could be possible to develop a nice plugin that would utilize the numerous RandomPoints functions. I have not yet discovered an exact use case but perhaps anonymizing statistical data could be one, and splitting polygons into about equal areas by creating RandomPointsInPolygon first and applying Voronoi polygons and merging neighboring polygons in some clever way afterwards. See this for reference http://gis.stackexchange.com/questions/171727/polygon-split-with-defined-area. I think that all these can be rather plans for the future than anything to implement into the next OJ release. -Jukka- Michaël Michaud wrote: Hi Jukka, Adding such geometry functions to OpenJUMP is generally not difficult. I have added "Minimum Bounding Circle" along with some others about one year ago, and if you notice some other useful jts functions which are not available in OpenJUMP, I will be pleased to add them. Michaël Le 19/11/2015 13:24, Rahkonen Jukka (MML) a écrit : Hi, There are some cool function in JTS https://sourceforge.net/p/jts-topo-suite/code/HEAD/tree/trunk/. I guess that some OpenJUMP functions in the geometry functions menu are the same JTS functions, like "Minimum Bounding Circle". I wonder how difficult it would be to add some more functions from JTS to OpenJUMP. Best way for browsing and testing the available functions is to download JTS from https://sourceforge.net/projects/jts-topo-suite/files/jts/ and run the testbuilder application from the bin directory. It seems that there is some unmaintained jts-jump plugin https://sourceforge.net/p/jts-topo-suite/code/HEAD/tree/trunk/jts-jump but I have no idea about what it was. -Jukka Rahkonen- ------------------------------------------------------------------------------ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net<mailto:Jump-pilot-devel@lists.sourceforge.net> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel ------------------------------------------------------------------------------ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net<mailto:Jump-pilot-devel@lists.sourceforge.net> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel ------------------------------------------------------------------------------ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net<mailto:Jump-pilot-devel@lists.sourceforge.net> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
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