simple solution and well thought :) we should go for
stefan 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
