Martin, Thanks for your valuable input. I will look at the code, but I suspect the best thing to do is to load LinearRings as LineStrings and ecplain this behavior in the Javadoc.
I'll report back to the list when I have a patch. SS On Thu, Nov 20, 2008 at 10:00 AM, Martin Davis <[EMAIL PROTECTED]> wrote: > Well, it's a valid geometry type in JTS, so it should work in OJ. There > may be limitations in how it can be manipulated, however - e.g. I > suspect that it can't be edited (or at least that if it is it will > revert to a plain ol LineString). > > If this is a concern, another option is to load LinearRings as > LineStrings. They should NOT be loaded as Polygons - LinearRings are > not areas. > > Sunburned Surveyor wrote: >> Martin, >> >> Is that a valid feature geometry type in OpenJUMP? I didn't know that >> it was. If it is, then this probably is a bug that needs to get fixed. >> >> SS >> >> On Thu, Nov 20, 2008 at 9:06 AM, Martin Davis <[EMAIL PROTECTED]> wrote: >> >>> Why not read the GML LinearRing into a JTS LinearRing? >>> >>> Sunburned Surveyor wrote: >>> >>>> Well, it seems from a "robustness" perspective that it would be good >>>> to read in linear rings, even if they are always represented >>>> internally and exported as polygons. >>>> >>>> I will wait for other programmers to comment on what they think the >>>> best course is, then I will implement the needed changes. >>>> >>>> SS >>>> >>>> On Thu, Nov 20, 2008 at 8:38 AM, Andreas Schmitz <[EMAIL PROTECTED]> wrote: >>>> >>>> >>>>> Sunburned Surveyor wrote: >>>>> >>>>> Hi, >>>>> >>>>> >>>>> >>>>>> I'm working on one of the OJ 1.2 bugs I selected for squishing and I >>>>>> had a quick question. >>>>>> >>>>>> Is the GML reader in OpenJUMP supposed to read features represented by >>>>>> a LinearRing? I thought a LinearRing was only used as an exterior or >>>>>> interior boundary of a polygon. A user filed a bug report because a >>>>>> feature geometry wasn't created from a LinearRing using JUMP's >>>>>> GMLReader. But I'm thikning that this isn't a bug, but an improper >>>>>> understanding of how feature geometries are represented in GML. A >>>>>> feature should be represented by a polygon, not a linear ring. >>>>>> >>>>>> If GMLReader is supposed to construct a feature goemetry (polygon?) >>>>>> from a linear ring, then I'll fix the bug. If GMLReader is not >>>>>> supposed to do this, because it isn't the proper way to represent a >>>>>> feature, then I will close the bug. >>>>>> >>>>>> >>>>> I think in GML2 this is allowed: >>>>> >>>>> http://schemas.opengis.net/gml/2.1.2/geometry.xsd >>>>> >>>>> One can always wonder why anyone would want it, but some people >>>>> apparently have >>>>> use cases for everything... The problem that is inherent here is, if you >>>>> read >>>>> the linear ring in as a polygon, what happens when exporting as GML >>>>> again? Will >>>>> it be exported as polygon or as linear ring? Is every linear ring also a >>>>> polygon? I suppose not, as there are almost no restrictions on the form >>>>> of a >>>>> linear ring, but many (such as orientation of the rings, self >>>>> intersections >>>>> etc.) on polygons. >>>>> >>>>> I'm unsure on how to solve this problem though, the better you want to >>>>> solve it, >>>>> the more work it is obviously. >>>>> >>>>> Best regards, Andreas >>>>> -- >>>>> l a t / l o n GmbH >>>>> Aennchenstrasse 19 53177 Bonn, Germany >>>>> phone ++49 +228 18496-12 fax ++49 +228 1849629 >>>>> http://www.lat-lon.de http://www.deegree.org >>>>> >>>>> -----BEGIN PGP SIGNATURE----- >>>>> Version: GnuPG v1.4.9 (GNU/Linux) >>>>> >>>>> iEYEARECAAYFAkklkpUACgkQ737OVr+Ru7pgtACg5bMBBMLlo3wNsiXw7D+BB0tz >>>>> OG8AoJc+QpDAnPZ2NTA+K//fxBcsCHI7 >>>>> =9hXg >>>>> -----END PGP SIGNATURE----- >>>>> >>>>> ------------------------------------------------------------------------- >>>>> This SF.Net email is sponsored by the Moblin Your Move Developer's >>>>> challenge >>>>> Build the coolest Linux based applications with Moblin SDK & win great >>>>> prizes >>>>> Grand prize is a trip for two to an Open Source event anywhere in the >>>>> world >>>>> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >>>>> _______________________________________________ >>>>> 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 the Moblin Your Move Developer's >>>> challenge >>>> Build the coolest Linux based applications with Moblin SDK & win great >>>> prizes >>>> Grand prize is a trip for two to an Open Source event anywhere in the world >>>> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >>>> _______________________________________________ >>>> Jump-pilot-devel mailing list >>>> Jump-pilot-devel@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >>>> >>>> >>>> >>> -- >>> Martin Davis >>> Senior Technical Architect >>> Refractions Research, Inc. >>> (250) 383-3022 >>> >>> >>> ------------------------------------------------------------------------- >>> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge >>> Build the coolest Linux based applications with Moblin SDK & win great >>> prizes >>> Grand prize is a trip for two to an Open Source event anywhere in the world >>> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >>> _______________________________________________ >>> 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 the Moblin Your Move Developer's challenge >> Build the coolest Linux based applications with Moblin SDK & win great prizes >> Grand prize is a trip for two to an Open Source event anywhere in the world >> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >> _______________________________________________ >> Jump-pilot-devel mailing list >> Jump-pilot-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >> >> > > -- > Martin Davis > Senior Technical Architect > Refractions Research, Inc. > (250) 383-3022 > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > 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 the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
