I have to work with plsql, the jts have the right algorithm so I've
decided to try it out: wrap the jts inside java stored procedures. It
hasn't been straigthforward but it works. Thanks for the hint Mike.
Fortunatly gt oracle-spatial plugin has some code to map
oracle.sql.STRUCT to JTS geometry, s
The recent JTS has a nice buffering options, namely the mitre buffer.
It does not have rounded corners, and has been very useful to me
(i.e., we can physically survey-out the buffer on the ground with
fewer points to locate and stake out).
http://lin-ear-th-inking.blogspot.com/2007/12/new-buffer-st
Hi Stefan. You guessed right, it's buildings generalization. I know
jts and geos quite well but unfortunatly I can't use them because I'm
working directly on oracle with plsql. I think buffer is the way, but
not the one oracle provides because it rounds the corners...
Bye,
Giovanni
2010/5/7 Stef
how about using R it has alpha shapes and a-like?
What you describe sounds like a problem in map generalization. I.e. the
approach of buffering is something what a colleague of mine once
implemented to generalize house-blocks for maps (aggregate the single
buildings). Unfortunately I don't kno
A nice implementation of alpha shapes with jts:
http://www.mail-archive.com/jts-de...@lists.jump-project.org/msg01019.html
2010/5/6 G. Allegri :
> Thanks Andrea for the links. Yes, I think the problem is similar, in
> fact I was also looking for concave hull and alpha shapes algoithms,
> but the
Thanks Andrea for the links. Yes, I think the problem is similar, in
fact I was also looking for concave hull and alpha shapes algoithms,
but the only open solution I've found is from CGAL [1] and... it's too
complex to extract and reimplement in my context (database procedural
programming).
IWe h
G. Allegri ha scritto:
I'm looking for an algorithm to do polygon cluster aggregation,
similar to the ArcInfo "Aggregate Polygon" [1].
I know about GEOS "Cascaded Union", but I need two more features:
1 - clustering of polygons that fall within a a certain threshold
distance from each other
2 -
I'm looking for an algorithm to do polygon cluster aggregation,
similar to the ArcInfo "Aggregate Polygon" [1].
I know about GEOS "Cascaded Union", but I need two more features:
1 - clustering of polygons that fall within a a certain threshold
distance from each other
2 - mantain orthogonality, i.
