Hi George, Happy to share. My student's name was Chang Sun, here is a link to his final project:
https://docs.google.com/file/d/0BzQUbm0qK7TrRDY3WVIzY2dvNkk/edit?usp=sharin g Happy to put you in touch with him, and/or me about it. This is not published it was his final report from a few years ago. Cheers, Chris ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Chris Mattmann, Ph.D. Senior Computer Scientist NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA Office: 171-266B, Mailstop: 171-246 Email: [email protected] WWW: http://sunset.usc.edu/~mattmann/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Adjunct Assistant Professor, Computer Science Department University of Southern California, Los Angeles, CA 90089 USA ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -----Original Message----- From: gpercivall <[email protected]> Reply-To: "[email protected]" <[email protected]>, gpercivall <[email protected]> Date: Friday, May 3, 2013 4:05 PM To: "[email protected]" <[email protected]> Subject: Re: Implement Hadoop base back-end for SIS >Chris > >Anything published on Hadoop and Geospatial stuff? > >George Percivall >The Open Geospatial Consortium >[email protected] > >-------- Original message -------- >From: "Mattmann, Chris A (398J)" <[email protected]> >Date: 05/03/2013 5:51 PM (GMT-05:00) >To: [email protected] >Subject: Re: Implement Hadoop base back-end for SIS > >+1 creating SIS processes for Hadoop would be what I would expect, >Martin too. I had a student in my Search Engines course that I teach >at USC do some Hadoop and Geospatial stuff a few years back (in 2010). >The goal was to build a Point/Radius evaluation algorithm for tiling >over Hadoop. It was mildly successful, and we may have something similar >here as an option for SIS. > >Cheers, >Chris > >++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >Chris Mattmann, Ph.D. >Senior Computer Scientist >NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA >Office: 171-266B, Mailstop: 171-246 >Email: [email protected] >WWW: http://sunset.usc.edu/~mattmann/ >++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >Adjunct Assistant Professor, Computer Science Department >University of Southern California, Los Angeles, CA 90089 USA >++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > > > > > >-----Original Message----- >From: Martin Desruisseaux <[email protected]> >Organization: Geomatys >Reply-To: "[email protected]" <[email protected]> >Date: Friday, May 3, 2013 1:45 PM >To: "[email protected]" <[email protected]> >Subject: Re: Implement Hadoop base back-end for SIS > >>Hello 张亚 >> >>Le 03/05/13 17:42, 张亚 a écrit : >>> I want to implement Hadoop base back-end for SIS during the GSoC 2013 >>> period. And have submitted a proposal. >>> Any suggestion will be welcome. >> >>I would like to help, but it is not clear to me which part of SIS could >>be the subject of a Hadoop work yet... Hadoop is a framework that allows >>for the distributed processing of large data sets across clusters of >>computers. Problem is that there is not yet (to my knowledge) any >>process in SIS which are numerically intensive enough for experimenting >>Hadoop. Those processes will exist later, but are not yet there. >> >>Actually we experimented Hadoop on our side about 2 or 3 years ago. We >>had a student who worked on that subject. His work was to rotate a tiled >>image, where each tiles were processed by a different node on a cluster. >>Of course doing an image rotation is a relatively simple process, but >>the goal was to experiment distributed processing rather than doing >>"real" work. The experiment was not very conclusive in part because we >>tried to perform the rotation with Java Advanced Imaging (JAI) and it >>was pretty hard to use JAI with Hadoop (JAI was not designed for that), >>and in part because the time needed for transferring large tiles between >>the nodes (even with ultra fast transfers) overcome the gain of using >>many nodes for such a "simple" task as image rotation. So we gained just >>enough experience for concluding that this is a challenging topic. >> >>But on the "SIS + Hadoop" topic, it seems to me that before to try >>Hadoop with needs to have some SIS processes? Would creating those >>processes be part of the Google Summer of Code? If so, it seems to me >>that this work alone could keep someone busy for the whole summer... >> >>Regards, >> >>Martin >> >
