ted in 5, I get
NullPointerExceptions. Help!
I'll paste in my code below.
thanks again,
-Frank
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Geometry.java:684)
at
edu.psu.geovista.jts.SpatialWeights.useIntersects(SpatialWeights.java:259)
at edu.psu.geovista.jts.SpatialWeights.main(SpatialWeights.java:292)
regards,
-Frank
On 5/30/07, Martin Davis <[EMAIL PROTECTED]> wrote:
Why not just use the intersects() method on your constru
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g we could save some rendering time.
Cheers
Andrea
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m/wiggythoughts
Change is good. See what’s different about Windows Live Hotmail. Check
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nted to).
Would you agree that if you had a new type of geometry that had
attribution that creating a Geometry subclass would be a better approach
than a user data style Map approach.
Paul
Martin Davis wrote:
As David points out, if a client has a use case where they need a map
of data,
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From: Martin Davis <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>
To: JTS Topology Suite Development <
jts-devel@lists.jump-project.org
<mailto:jts-devel@lists.jump-project.org>>
Date: Mon, 11 Jun 2007 09:53:13 -0700
Subject: Re:
clude that changes in the project?
best regards,
Fernando
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ification). As java
serialization works, the only test that comes to my mind is to store
the index, retrieve it and check if it has the same elements than the
original one. Is necessary anything more?
best regards,
Fernando
On 6/14/07, * Martin Davis* <[EMAIL PROTECTED]
<mailto:
LineB -> corte = 1.8330473045449895E-14
Note that the result of the lineA intersection lineB doesn't intersect
lineaA neither lineB. Maybe I'm missing something My JTS version
is 1.8.
Thanks in advance,
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Thanks, Mateusz. Good to know someone is reading my blog... ;^)
Mateusz Loskot wrote:
Martin Davis wrote:
JTS'ers,
If you're interested, I've written up an article on the history of the
design and development of JTS and GEOS. It's on my blog at:
http://lin-ear-th
JTS'ers,
If you're interested, I've written up an article on the history of the
design and development of JTS and GEOS. It's on my blog at:
http://lin-ear-th-inking.blogspot.com/2007/06/history-of-jts-and-geos.html
Martin
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/demotheatre/
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ygon
neatline to create a new polygon for the river portion on the right?
Cheers,
Paul
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es"
are in fact holes in the marsh, there's more "hole" linework in the
sheet than "edge" linework.
P
On 22-Jun-07, at 10:34 AM, Martin Davis wrote:
It's not a one-liner, if that's what you mean by "easy"... 8^(
There's two main parts t
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for submitting bugs... if i'm wrong, please
show me a jira issue or other places :)
In any case... this test fails:
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Paul
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factory.createPoint(coordinate);
return distance(point);
}
Ideally eventually if we ever have time it would be nice to create a
version of DistanceOp that works with a coordinate and point so you
could save a fraction of overhead, not sure how much performance
improvement you would get.
Paul
Martin
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etry.LineSegments()
while ( Segments.hasMore () )
{
LineSegment seg = (LineSegment)Segments.nextElement();
// Process the LineSegment object
seg.p0.x
}
Hope you can help!
regards
S
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then the code would look like:
for (Iterator i = new GeometryComponentIterator(g); i.hasNext(); ) {
Geometry comp = (Geometry) i.next();
if (comp instanceof LineString) {
Coordinate[] pts = comp.getCoordinates();
// iterate over the segments here
}
}
Does this sound useful?
Martin Davis
I did.
That method will work, but it's pretty fiddly if you need to deal with
all the various geometry types.
Paul Selormey wrote:
It seems you did not read the continuation of this post.
Best regards,
Paul.
On 7/24/07, Martin Davis <[EMAIL PROTECTED]> wrote:
Welcome, Simon!
your booth now for a big savings! For information on
exhibitor and sponsorship opportunities, see http://foss4g2007.org/
sponsors/ or contact Paul Ramsey, Conference Chair via email at
[EMAIL PROTECTED]
We hope to see you in Victoria, Canada in September, in just two months!
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e code
using JTS CVS :)
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ibrary
Michaël
Martin Davis a écrit :
Real Soon Now
Paul Selormey wrote:
I'll make sure this method ships with 1.9 !
Do you have a release date?
Best regards,
Paul.
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rue;
}
}
return false;
}
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Another question for you, Tore.
Do you have some control over the target (LHS = Left-Hand Side) geometry
type in your queries? And if so, do you really need the optimizations
for point geometry types on the LHS?
Martin Davis wrote:
Tore,
Good news for you! I'm working right n
collapse to a single point, which
is not a valid linestring." a true statement?
>From a surveyors perspective any line that is shorter than 0.10 of a
foot isn't a line anyways, it is your measurement error. :]
The Sunburned Surveyor
On 8/15/07, Martin Davis <[EMAIL PROTECTED]&g
f the
CoordinateSequence class was being encouraged in place of the
Coordinate class.
Thanks,
The Sunburned Surveyor
On 8/9/07, Martin Davis <[EMAIL PROTECTED]> wrote:
It's better to use:
double lon = -105.0;
double lat = 40.0;
GeometryFactory geometryFactory = new Geo
cs is full of structures which in degenerate cases
reduce to other, simpler structures. Usually it's more graceful to
simply handle the degenerate cases than to squawk and refuse to process
them.
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/presentations/posters
Labs & Workshops:
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[index * dimension + ordinate];
}
}
Paul
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Hi, sometime ago I developed a Snap Overlay operation by extending
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and best regards!.
From: Martin Davis <[EMAIL PROTECTED]>
Reply-To: JTS Topology Suite Development
To: JTS Topology Suite Development
Subject: Re: [jts-devel] Undesired result with Snap Overlay Operation
Date: Mon, 27 Aug 2007 12:22:46 -0700
Alvaro:
Some observations and expla
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java:967)
at gisengine.LineConverter.getUnion(LineConverter.java:247)
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e,I used 50 for the threshold and used
DouglasPeuckerLineSimplifier.simplify() for simplify,will this method
(TopologyPreservingSimplifier) help?can i use this for instead?
2007/9/25, Martin Davis <[EMAIL PROTECTED]>:
This is almost certainly due to a robustness problem in the buffer
computation. This can
D] <mailto:[EMAIL PROTECTED]>
www.graymatterinc.com <http://www.graymatterinc.com>
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ng something here ?
Joshua Portway
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n answer this
with some testing, but I thought you might know off the top of your
head.)
Thanks,
The Sunburned Surveyor
P.S. - Which example class do you speak of? I'd like to take a look at it.
On 10/5/07, Martin Davis <[EMAIL PROTECTED]> wrote:
Yep, that looks right.
Is this not
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elled after the Java
version. The Java API could provide all/most the user needed.
Best regards,
Paul.
On 10/20/07, Martin Davis <[EMAIL PROTECTED]> wrote:
You're right, this isn't in JTS 1.8, but has been added to JTS 1.9 (at
least for rotation).
The best way to do this i
line.
Is there already a function in JTS? I can't fand it:-(
thx
Peter
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lcomed.
What really serves as the tag on this class?
Best regards,
Paul.
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For those of you who were asking about documentation for the overlay
algorithms in JTS...
http://lin-ear-th-inking.blogspot.com/2007/11/implementations-of-polygon-overlay.html
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rationale which could help me make a decision on how to treat the
types?
Thanks in advance,
-rory
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Martin
CodeKaizen wrote:
On Nov 20, 2007 1:09 PM, Martin Davis <[EMAIL PROTECTED]> wrote:
The goal at some point is to refactor these so that planargraph becomes
the only graph implementation. It hasn't happened yet due to lack of
time and money.
Ah, well do I know th
Best Regards
Sandro Zacchino
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.
John,
I was asking for CVS repo, not packages for download.
The JTS CVS at SF.net is empty:
http://jts-topo-suite.cvs.sourceforge.net/jts-topo-suite/
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data in
the database there are a few points which don't get read from the DB if
I use the rounded buffer. I solved that by just increasing the buffer
size to return more data so it does work.
Paul
Martin Davis wrote:
Further on this, the closest you could get to this is to set the
number
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7;ll only be mitered at
the start/end of the boundary.
Paul
Martin Davis wrote:
Yep, I think that would work.
Paul Austin wrote:
Martin,
In terms of an aglorithm would this work? May not be the most
efficient way.
* Create a buffer with square ends for each line segment in the
tring, otherwise with a line string it'll only be mitered at
the start/end of the boundary.
Paul
Martin Davis wrote:
Yep, I think that would work.
Paul Austin wrote:
Martin,
In terms of an aglorithm would this work? May not be the most
efficient way.
* Create a buffer with s
nando
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Paul
Martin Davis wrote:
Ok, good to hear you have a workaround.
The square corner (I believe the technical term would be "mitred
corner") idea is a good one, tho - I'll add it to the ToDo list!
Paul Austin wrote:
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find the way to define an arc or
circle in the JTS Suite.
Have you any idea or advice on how to do that?
Thanks in advance,
Jim
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talk on the JPP list about
what we will need to do to migrate to 1.9 in OpenJUMP after the bugs
are worked out.
The Sunburned Surveyor
On Dec 12, 2007 4:22 PM, Martin Davis <[EMAIL PROTECTED]> wrote:
Possibly of interest to some - here's a link to a blog entry describing
some new f
andon
On Dec 13, 2007 1:33 PM, Martin Davis <[EMAIL PROTECTED]> wrote:
No, Geometry interfaces have not yet made their appearance. When that
happens it willl probably break old code, so I've been holding off doing
that. I plan on making the release that switches to Geometry interfaces
ing.
Jody
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ing the minimal amount of work required to evaluate
predicates.
Martin Davis wrote:
b, c, and d should all have the same performance. a will probably be
twice as slow (due to two calls to predicates)
Be careful about the precise semantics of the predicates. (c) is not
equivalent to (d) (
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eSequences (e.g. for isCCW)?
Cheers,
Paul
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e geometry functions
* Added Copy Result to Test button
Code Improvements
* Restructured code for more flexibility, better Swing functionality
* Made it easier to add geometry functions
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rrect version of the same class
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This issue is now fixed on SourceForge.
Martin Davis wrote:
Ok, the problem is that the class BasePreparedGeometry is obsolete and
should not be in the distribution. No idea how it got in there - I'll
see if I can remove it. For now just delete that class.
Diego Guidi wrote:
I can&
forward to working with JTS 1.9 and possibly
on working on its integration into OpenJUMP in the near future.
The Sunburned Surveyor
On Jan 3, 2008 3:19 PM, Martin Davis <[EMAIL PROTECTED]> wrote:
I can't see any problem. How about posting the file that you think has
errors, and al
using the getCoordinates on
the exterior ring. Might be another place to change to coordinate
sequence to eek a little more performance for packed coordinate sequences.
PAul
Martin Davis wrote:
Certainly possible, and definitely a nice to have. I'll see about
working this into the pipeline. I
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Cheers and thanks,
Peter
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TIA
Cheers,
Peter
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length?
Thanks for any info.
The Sunburned Surveyor
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r twice in
some code that works with JTS.)
Thanks,
The Sunburned Surveyor
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Firmensitz: Muenchen, Amtsgericht Muenchen HRB 140 509
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very beginning.
*return* gf
.createLineString(*new* Coordinate[] {
*new* Coordinate(xput1, xput2),
*new* Coordinate(output1, output2) });
}
}
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roken.
On Jan 22, 2008 11:12 AM, Martin Davis <[EMAIL PROTECTED]> wrote:
At long last JTS has a FAQ (or the beginnings of one). My excuse is
that I wanted to wait until there was a large enough population to have
a statistically valid determination of "frequent"
look forward to checking out some of the other things you have been
working on. I'm curious about the motivation for JEQL. What advantages
does it have over SQL?
Landon
On Jan 22, 2008 11:27 AM, Martin Davis <[EMAIL PROTECTED]> wrote:
Yep, I decided to pull all my various projec
AQ!
Sunburned Surveyor wrote:
Martin,
I should have read over the intro page for JEQL more closely. Let me
do that and then I'll wait for those examples. :]
Landon
On Jan 22, 2008 1:02 PM, Martin Davis <[EMAIL PROTECTED]> wrote:
Landon,
I don't think I can say anything m
L queries directly against the shapefile.
This would also work with any other datasources which JEQL offers.
Hmmm - I guess I better start a JEQL listserv!
Tore Halset wrote:
On Jan 23, 2008, at 19:02, Martin Davis wrote:
A further note: although not currently implemented, JEQL will provide
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Martin Davis
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Refractions Research, Inc.
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ng features of the GDMS library, the engine
behind
OrbisGIS, a recent project driven by Erwan Bocher.
http://orbisgis.cerma.archi.fr/?page_id=44
Michaël
Martin Davis a écrit :
> Not at the moment, but that's an excellent idea!
> I've thought about it
JTS 1.9 is returning an incorrect result for the A.contains(B) &
B.within(A) predicates in the case where A is a rectangle and B is a
Point which lies on the boundary of A.
This does not affect relate(), so the workaround is to use relate
directly if this situation is a concern.
--
Ma
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