>At one point I was >thinking it would be nice to have a Set Fence from Geometry menu item as >well. > > Yes, this is a feature I missed sometimes. That makes me remember that trying to copy/paste geometry from an existing layer to the fence, I get strange things like having 2 geometries in the fence layer. (I know I have to reproduce it to be able to fill a bug report).
Michaël >Larry Becker wrote: > > >>Hi, >> >> Recent work with Extract Layers by Geometry Type, and improving >>OpenJump's support for very large selections, has convinced me that >>JUMP needs a mechanism for dealing with subsets of large layers. >>Although the selection mechanism is very flexible, it is very >>expensive in terms of memory and processing. To seem what I mean, >>consider Arnd's million point layer problem. To break the layer into >>more manageable pieces, he tried to select some of the points and move >>them to another layer. When this is done with such a large selection, >>the UI must build gigantic data structures. The result is an >>extremely slow response or an out of memory error. >> >>An approach that might work for some problems is to use the Fence tool >>to indicate a subset of the data that can be used in place of a >>selection. The advantage is that no data structures are needed and >>there are no selection handles to draw. I was thinking of producing >>another Layer Extract plugin that would extract features in the Fence >>to a new layer. By coding support methods in a utility class, we >>could gradually add support for "features in fence" subsets to the >>other tools. >> >>What do you think? >> >>regards, >> >>Larry Becker >> >>-- >>http://amusingprogrammer.blogspot.com/ >>------------------------------------------------------------------------ >> >>------------------------------------------------------------------------- >>This SF.net email is sponsored by: Splunk Inc. >>Still grepping through log files to find problems? Stop. >>Now Search log events and configuration files using AJAX and a browser. >>Download your FREE copy of Splunk now >> http://get.splunk.com/ >>------------------------------------------------------------------------ >> >>_______________________________________________ >>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: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
