While I'm subscribed to the H2 developer's mailing list and have read all the archives regarding any spatial discussions, I haven't been active as a poster yet because I have yet to really start modifying H2 itself. I have instead been porting the previously written spatial code to the newest H2 codebase. I will introduce myself there shortly and begin getting pointers regarding how best to hook in and index into H2.
--Christopher --- On Mon, 7/20/09, Sunburned Surveyor <sunburned.surve...@gmail.com> wrote: > From: Sunburned Surveyor <sunburned.surve...@gmail.com> > Subject: Re: [JPP-Devel] H2-OJ integration > To: "OpenJump develop and use" <jump-pilot-devel@lists.sourceforge.net> > Date: Monday, July 20, 2009, 9:39 AM > Thanks Stefan. I was thinking of > letting Martin know as well. I'm sure > he will be happy to add an R-Tree to JTS. > > Christopher: Have we been in touch with the programmers at > H2 to let > them know about your work on a spatial index? > > Landon > > On Sat, Jul 18, 2009 at 4:17 AM, Stefan Steiniger<sst...@geo.uzh.ch> > wrote: > > Hei, > > > > if you have question on the R-Tree thing, write also > to Martin Davis on > > the JTS user list http://lists.refractions.net/mailman/listinfo/jts-devel > > mbda...@refractions.net > > > > He knows tree structures pretty well and is probably > happy if he can > > help you and if you plan to contribute this to JTS. > > > > I 'cc' him > > > > stefan > > > > Christopher schrieb: > >> This week I began coding an R*Tree. The H2 > database lacks a spatial indexing which is necessary for GIS > use. The maintainer of H2 had recommended that any spatial > index first be coded as a stand alone library, then rolled > into a memory only H2 index, then expanded to a disk based > index. After a thorough investigation of various spatial > indexing data structures, I chose the R*Tree for its > performance and proven track record. After looking at all > the open source java R*Trees I could find, I decided that > none of them would work for my purposes. I'm designing my > R*Tree library to integrate with JTS, as that is the > foundation that OpenJUMP and many other Java GIS programs > are based off of and therefore the R*Tree data structure > will be a valuable asset on its own outside of H2. > >> > >> No real problems to speak of except that the > R*Tree paper is deceptively simple; I think my LOC already > exceeds the length of the paper. > >> > >> Next week I'll finish the data structure and begin > the heavy testing required for a base level data structure. > >> > >> --Christopher > >> > >> > >> > >> > >> > ------------------------------------------------------------------------------ > >> Enter the BlackBerry Developer Challenge > >> This is your chance to win up to $100,000 in > prizes! For a limited time, > >> vendors submitting new applications to BlackBerry > App World(TM) will have > >> the opportunity to enter the BlackBerry Developer > Challenge. See full prize > >> details at: http://p.sf.net/sfu/Challenge > >> _______________________________________________ > >> Jump-pilot-devel mailing list > >> Jump-pilot-devel@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > >> > >> > > > > > ------------------------------------------------------------------------------ > > Enter the BlackBerry Developer Challenge > > This is your chance to win up to $100,000 in prizes! > For a limited time, > > vendors submitting new applications to BlackBerry App > World(TM) will have > > the opportunity to enter the BlackBerry Developer > Challenge. See full prize > > details at: http://p.sf.net/sfu/Challenge > > _______________________________________________ > > Jump-pilot-devel mailing list > > Jump-pilot-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > > > > ------------------------------------------------------------------------------ > Enter the BlackBerry Developer Challenge > This is your chance to win up to $100,000 in prizes! For a > limited time, > vendors submitting new applications to BlackBerry App > World(TM) will have > the opportunity to enter the BlackBerry Developer > Challenge. See full prize > details at: http://p.sf.net/sfu/Challenge > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
