Hi Jukka, Larry > - "Combine two selected polygons tool" is fast but it has a little bug. It > allows to combine polygons even if the layer is non-editable. >> How do you do that ? Menu item is inactive (grayed) if layer is non editable. > Good question indeed. It took awhile to repeat it. This is somehow related to > EZ-Buttons shortcut. The shortcut seems to remember, not only the menu > selection it is connected with, but also the state of OJ project when the > shortcut was created. It can be created by opening some layer to OJ and > making is editable so thet combine two polygons is working. Create the > EZ-Button shortcut now and add a new layer. Now the EZ-Buttons shortcut > combines polygons even the layer is not editable. So this is a feature in the > EZ-Buttons. I tried to fixed this problem.
Jukka, could you have a look to check it solves your problem (from svn 2781) Larry, could you double check the small change I did to the EasyPanel class http://jump-pilot.svn.sourceforge.net/viewvc/jump-pilot/core/trunk/src/org/openjump/core/ui/plugin/view/EasyPanel.java?r1=1873&r2=2781&sortby=date Thanks, Michaël > - "Combine polygon with neighbouring polygon" is very slow and can give an > out-of-memory error. Is it perhaps walking through all the features when > searching for the one to use for combining? I would guess that it should be > much faster if it correctly selects just the few adjacent polygons for > candidates first. >> I think the algo of this plugin is not so simple... I think Stefan know it >> better > - Making union of selected features suits me well because I would like to > combine about 10-20 polygons together. However, because it creates new layer > each time there is some extra work with joining them together later. > - "Union selected in place (if result can be simple polygon)" would be the > ideal tool for just this case. >> Agree, this would be helpful. Not sure I would limit to simple polygons >> though. > In my case I want that the new areas are also continuos. Sometimes > multipolygons would be acceptable. Perhaps there could be a check box for > cases when features selected for combining are all simple polygons "Allow > multipolygons as new features? ". If selection already contains multipolygons > then the result can naturally contain them too. > >> I suppose you don't want to union all adjacent polygons, otherwise, the >> simplest is to union the whole layer, then to explode the multipolygon. > Yes, this is the case. All the polygons in the layer are adjacent and all > together would be a monster polygon with thousands of holes and hundreds of > thousands of vertices. I am going to reduce the number of polygons into about > 500 and I want all them to have some reasonable amount of vertices. > Automatic system by using some grid layer as a helper layer for splitting > data into rectangular pieces first to be unioned later tile by tile would not > give directly a good result. Data is from archipelago and in some places > there is just open sea and in other places masses of islands. I will get the > job ready faster by doing the selections manually. "Union selected in place" > tool would make it more convenient, though. > > >> Here is a workaround (didn't check it though) >> - create a second layer. >> - draw 1 linestring per group of building, intersecting all buildings you >> want to aggregate (and only those one) >> - create an auto-increment attribute on these linestring layer >> - do a spatial join to transfer linestring id to polygons >> - union polygons by attribute >> (you will get a multipolygon with all polygons not intersecting a linestring >> : explode it) > Sounds doable, I will try it next week. > > -Jukka- >> Michaël > > > > -Jukka Rahkonen- > > > > > > ------------------------------------------------------------------------------ > This SF email is sponsosred by: > Try Windows Azure free for 90 days Click Here > http://p.sf.net/sfu/sfd2d-msazure > > > > _______________________________________________ > 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 > > > > ------------------------------------------------------------------------------ > This SF email is sponsosred by: > Try Windows Azure free for 90 days Click Here > http://p.sf.net/sfu/sfd2d-msazure > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > > ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
