Peppe, It should be really easy to whip up some code that makes the simple string conversion you are talking about. Are your students coding in Java?
The Sunburned Surveyor On Thu, Jul 15, 2010 at 2:22 AM, Giuseppe Aruta <giuseppe_ar...@yahoo.it> wrote: > Hi Stefan, > thanks for the answer. I got so enough strategies to create polygons from > points. I assume that probabily yours (or kosmo one, which is similar) are > the easest way. Nevertheless I think I will organize a routine using tables > to get WKT strings: my scope is to teach to students some basics of spatial > geometry and WKT seems to get the point. > regards > > Peppe > > --- Mer 14/7/10, Stefan Steiniger <sst...@geo.uzh.ch> ha scritto: > >> Da: Stefan Steiniger <sst...@geo.uzh.ch> >> Oggetto: Re: [JPP-Devel] How to import a table of polygons >> A: "OpenJump develop and use" <jump-pilot-devel@lists.sourceforge.net> >> Data: Mercoledì 14 luglio 2010, 20:04 >> Hei Peppe, >> >> I have a tool too, which creates lines from points if an >> attribute is >> given that can be used for ordering (well.. assuming that >> you load the >> data in the correct order you could just create a new >> attribute and >> assign numbers in order). >> >> However, that would just create a line from all points, as >> there needs >> to be an indicator where the line is finished and a new >> started. >> >> Getting polygons out of lines is simple with the planar >> graph function - >> more or less. >> >> stefan >> >> Giuseppe Aruta wrote: >> > Hi London, >> > thanks for your answer.ù >> > Really I fegure out I can do it using a spreadsheet. >> > The basic work is to transform, for instance, a >> line coordinates: 0,0 0,2 2,2 2,0 0,0 into a wkt string: >> Polygon ((0,0 0,2 2,2 2,0 0,0)). This is not difficult but >> sometimes confusing and long. >> > It would be interesting to explore a way that involve >> OJ directly using table >> > >> > regards >> > >> > Peppe >> > >> > P.S. Francisco Helguera from SAIG wrote me that Kosmo >> has a "Get >> > lines from points" tool that should work - but no >> import table. >> > >> > --- Lun 12/7/10, Sunburned Surveyor <sunburned.surve...@gmail.com> >> ha scritto: >> > >> >> Da: Sunburned Surveyor <sunburned.surve...@gmail.com> >> >> Oggetto: Re: [JPP-Devel] How to import a table of >> polygons >> >> A: "OpenJump develop and use" <jump-pilot-devel@lists.sourceforge.net> >> >> Data: Lunedì 12 luglio 2010, 17:14 >> >> Peppe, >> >> >> >> You'd have to specify the start and end of each >> LineString >> >> or Polygon >> >> in the point file. So you'd need more than just >> points, >> >> you'd need >> >> some other mark-up to. >> >> >> >> The text delimited point importer I built is made >> to >> >> separate out a >> >> "linework code". Surveying software typically uses >> the >> >> linework code >> >> input by the field surveyor to automatically >> generate >> >> linework. I >> >> haven't bolted this functionality on to my point >> import >> >> tool, but it >> >> can be done. >> >> >> >> The Sunburned Surveyor >> >> >> >> On Mon, Jul 12, 2010 at 6:16 AM, Giuseppe Aruta >> <giuseppe_ar...@yahoo.it> >> >> wrote: >> >>> Hi all, >> >>> tecnically Openjump/Skyjump and Kosmo have >> many >> >> strategies to import a set of coordinates as >> points, either >> >> using WKT structures or via tables. >> >>> I just wonder if it is possible to import a >> set of >> >> coordinates (as table) and create directly >> lines, closed >> >> lines or polygons. >> >>> Or to load a point layer and convert >> them to a line >> >> layer >> >>> I checked around and I cannot find anything >> but >> >> digitalizing. >> >>> I thank for the answers >> >>> >> >>> Giuseppe Aruta >> >>> >> >>> >> >>> >> >>> >> >>> >> >> >> ------------------------------------------------------------------------------ >> >>> This SF.net email is sponsored by Sprint >> >>> What will you do first with EVO, the first 4G >> phone? >> >>> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first >> >>> >> _______________________________________________ >> >>> Jump-pilot-devel mailing list >> >>> Jump-pilot-devel@lists.sourceforge.net >> >>> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >> >>> >> >> >> ------------------------------------------------------------------------------ >> >> This SF.net email is sponsored by Sprint >> >> What will you do first with EVO, the first 4G >> phone? >> >> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first >> >> _______________________________________________ >> >> Jump-pilot-devel mailing list >> >> Jump-pilot-devel@lists.sourceforge.net >> >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >> >> >> > >> > >> > >> > >> > >> ------------------------------------------------------------------------------ >> > This SF.net email is sponsored by Sprint >> > What will you do first with EVO, the first 4G phone? >> > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first >> > _______________________________________________ >> > Jump-pilot-devel mailing list >> > Jump-pilot-devel@lists.sourceforge.net >> > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >> > >> > >> >> ------------------------------------------------------------------------------ >> This SF.net email is sponsored by Sprint >> What will you do first with EVO, the first 4G phone? >> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first >> _______________________________________________ >> Jump-pilot-devel mailing list >> Jump-pilot-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >> > > > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? 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