Dear SS (and others) Could you let me know ehat the status is for the use of Java 1.6 - has a decision been made to move OpenJump, or is it still a work in progress.
Geoff Stefan Steiniger wrote: > Hei Christopher > > thanks for your outline :) > I actually have not that much background knowledge to evaluate if what > you do propose is good, but I guess you know it better. But modularity > is always a plus and documentation is sufficient. However.. a good rule > is to always start with a simple model and extend it later. I.e. one > could also make first all in one and then introduce modularity later. > > btw. Today I just stumbled across this article that has been published > this month: > "Sweep-line algorithm for constrained Delaunay triangulation" > http://www.informaworld.com/openurl?genre=article&issn=1365%2d8816&volume=22&issue=4&spage=449 > > If there is need I can send it to you. Note, that it is a 2D algorithm > (brwosing the article shortly). I actually have needs too for 2D CDT's.. > in map generalization. > > cheers > stefan > > Christopher wrote: > >> Sorry for the radio silence, I've been a thinking >> philosopher not an eating philosopher. I can only hope >> a fork and food are there when I need them ;) >> >> I've been reading the papers of the computational >> geometry "heros" and thinking of an overall framework >> for the TIN side of things. I just got my copy of >> "Foundations of Multidimensional and Metric Data >> Structures" by Hanan Samet yesterday and it is already >> proving a valuable resource. >> >> Broadly speaking, I want to structure the TIN >> import/creation side as a serial chain. Each node in >> the stream would either gather statistics about the >> stream flowing through it, alter the input stream into >> an changed version of the current type of stream, or >> alter the input stream into a different kind of output >> stream altogether. >> >> Suppose we had defined streams of DataSource (file, >> database, WMS, etc), Geometry, Point, LineString, >> GeometryCollection, and TINface. Then we can have a >> bunch of small modules that process these streams in >> different ways that can then themselves be combined in >> different ways given the need. For instance, one >> module could take an I/O stream from a USGS NED .bif >> elevation file then output a stream of Points. Another >> module could take a stream of Points, perform a simple >> random insertion Delaunly algorithm, then output a >> stream of TINfaces. The final module down the line >> would take the TINfaces and output an instance of a >> TIN. An alternate final module could take save the TIN >> to a file or even a database. >> >> Some benefits of this structure include: >> * being able to use the same module in very different >> types of chains. >> * modules in each layer (ie you could have different >> Delaunly algorithms for PointStream -> TINface >> transition) could be easily swapped around, making >> this a great research platform. >> * by using Paul's JCSP lib, the different nodes on a >> stream could be run concurrently allowing for >> wonderful scaling on today's multi-core, >> multi-processor machines. >> * it should work equally well for a small NED data set >> imported into memory or a huge raw LIDAR DEM file >> saved into a PostGIS database. >> >> Right now, I'm reading my eyes out and trying to >> figure out what kind of streams and data structures >> will be needed to be able handle any kind of TIN >> importation tasks might be needed by anyone, anywhere, >> in any java GIS project. I also have finals going on, >> so don't expect any worknig code in the next week or >> so. >> >> As far as future funding, I'm going forward as if >> everything will go through fine and no checks will >> bounce. I'll probably still work on the project if >> something goes wrong, but the manhours will be much >> less given that I'll have to find other work for the >> summer. >> >> --Christopher >> >> >> >> --- Sunburned Surveyor <[EMAIL PROTECTED]> >> wrote: >> >> >>> Paul, >>> >>> Thanks for the link on JSR-275. That looks very >>> interesting, and >>> surprisingly simple. I just skimmed through the >>> introduction of the >>> JavaWorld article, but I will read it in more detail >>> this weekend. I >>> think I can incorporate it into the code I'm already >>> working on. >>> >>> Stefan and Chris, >>> >>> >>> I explained to Chris the conditions that must be met >>> before we are >>> accepted. I think he has a good understanding of >>> these. It seemed from >>> our early e-mails that he was eager to move forward. >>> Stefan is correct >>> in that we do not have a gaurantee of acceptance or >>> payment from >>> Chris' work. He would be working as a volunteer like >>> the rest of us >>> for the time being. >>> >>> The Sunburned Surveyor >>> >>> On Fri, Apr 11, 2008 at 11:31 AM, Stefan Steiniger >>> <[EMAIL PROTECTED]> wrote: >>> >>>> Question.. is Chris accepted, i.e. will he get a >>>> >>> grant by GSofC? >>> >>>> Otherwise it is his decision to work on it or not >>>> >>>> stefan >>>> >> __________________________________________________ >> Do You Yahoo!? >> Tired of spam? Yahoo! Mail has the best spam protection around >> http://mail.yahoo.com >> >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference >> Don't miss this year's exciting event. 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There's still time to save $100. > Use priority code J8TL2D2. > http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > > > -- Dr Geoffrey G Roy Cadplan 129 Gloster Street, Subiaco WA 6008 Tel: (08) 9381 4870 Fax: (08) 9382 4459 Email: [EMAIL PROTECTED] http://www.cadplan.com.au ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
