[postgis] More on JTS

[mbdavis]

In response to Dave:

There are a couple of differences between JTS and some other popular spatial
APIs (such as SDE and Oracle Spatial).  JTS is designed to implement the OGC
Simple Features Specification exactly (including things like the DE-9IM
matrix, and the treatment of boundaries).  Also, JTS is designed to support
an explicit precision model and to be robust in its handling of numerical
calculations.  Robustness is important, because it means that spatial
relationship queries will be correct and consistent no matter what the order
and precision of the input data is.  Another goal is to have clear and clean
implementations of the algorithms, so that the open-source code can serve as
an example of spatial algorithm development and a framework for future work.
(Like Dave, I've been frustrated at finding so little quality source code
for spatial algorithms on the Web.  Part of the problem, I suspect, is that
spatial processing is a very diverse field, so the chances of finding code
for exactly the requirements you have is small.  Also, it's a lot of work to
make a high-quality, complete API!   Hopefully, JTS will improve on this
situation. )

In response to Adrian - there isn't a Web site yet, but there will be soon,
I hope!  We're waiting until the project concludes before revealing it to
the world in general.

Martin Davis, Senior Technical Specialist
Vivid Solutions Inc.
Suite #1A-2328 Government Street   Victoria, B.C.   V8T 5G5
Phone: (250) 385 6040    Fax: (250) 385 6046
EMail: mbdavis at vividsolutions.com  Web: www.vividsolutions.com


------------------------ Yahoo! Groups Sponsor ---------------------~-->
Small business owners...
Tell us what you think!
http://us.click.yahoo.com/vO1FAB/txzCAA/ySSFAA/PhFolB/TM
---------------------------------------------------------------------~->

To unsubscribe from this group, send an email to:
postgis-unsubscribe at yahoogroups.com

 

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/