No, it shouldn't be hard to port the code. There's not actually too
much code to add - 1 class and a few lines of code in another class.
I was planning to alert the GEOS folks to this development, but I wanted
to wait until I'd fixed the linestring simplification logic, and some
independent testing had been done on JTS. Both of these have now been
accomplished, so I'll post a notice to the GEOS list.
Stephen Wong wrote:
Hello,
I'd love to test this if there was a GEOS implementation of it... Will
it be difficult to port quickly?
Thanks,
Stephen
On Wed, Oct 8, 2008 at 5:22 PM, Martin Davis <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Larry, a question about your testing. Were these geometries
polygons or linestrings? The reason I ask is that I have one
optimization (simplification) which is working for polygons, but
not yet for linestrings. I'm curious to know whether the speed
improvement was due to all the optimizations, or just one.
Larry Becker wrote:
Congratulations Martin! Buffering 41 complex aircraft
features took 83 seconds with your old algorithm, and only 2
seconds using your new one. I could find no anomalies.
regards,
Larry Becker
On Wed, Oct 8, 2008 at 4:23 PM, Martin Davis
<[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
<mailto:[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>> wrote:
JTS'ers,
As you may have experienced, buffering in JTS currently has
some
performance challenges in situations involving large buffer
distances. I'm excited to say that I've implemented some code
enhancements which *dramatically* improve buffer performance in
these cases (as well as providing an overall improvement).
I've tested this code as extensively as I can, and am pretty
confident that it is robust and accurate. But it's always
good to
have other people beat on it as well!
So, is anyone out there ready, able and willing to test out the
new buffering code? Ideally this would be someone who has a
application which uses buffering in a significant way, and
which
allows determining the performance and correctness
characteristics
effectively. I'm looking for feedback to either confirm
that this
really is an improvement, or some test cases which reveal
issues
if there are any.
If you're able to help out, you can either download and
build the
codebase from CVS, or I've built an alpha release of JTS 1.10
which is available here:
http://tsusiatsoftware.net/jts/files/jts-1.10-alpha.zip
Thanks - Martin
-- Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022
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<mailto:[email protected]
<mailto:[email protected]>>
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Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022
_______________________________________________
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[email protected]
<mailto:[email protected]>
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[email protected]
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--
Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022
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