gmane.comp.gis.geotools2.user

Need help in creating Point

PARDHU D — 2013-05-24T10:22:16

Hi to all,

Can any one please help me. When I click any place on the JMapFrame I want to get a point on the JMapFrame i.e I want to create a new point in JMapFrame. I wrote some code for this after that I don't know what I have do. Because I am not a that much programmer. Please find here attached file which contains my code.

Thanks in advance.


Regards,
D Pardhu.
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Import, export dgn to shape or postgres

Truong Pham Minh — 2013-05-24T02:16:27

Hi list,
I'm trying import, export dgn to shape file by geotools. I googling for two days but no information about that. I know that maptools ogr2ogr can do something like that. 
So my questions are:
Is there any way to import, export dgn to shapefile (or postgres) using geotools api?
Is there any way to execute ogr2ogr by using geotools?
Tkanhs list,
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Re: Factory Tutorial

Andrea Aime — 2013-05-23T06:17:47

On Thu, May 23, 2013 at 2:20 AM, Brett Walker
<brett.walker-kiyiEBJBgPtm/Kok3h1/6Q< at >public.gmane.org>wrote:


That's how we normally do it, yes. I believe there is also some way to
register a factory programmatically,
but can't quite remember how (because... well, because almost all of
GeoTools uses META-INF/services files)

Cheers
Andrea

Re: Factory Tutorial

Brett Walker — 2013-05-23T00:20:06

Hi Paige,

What do you mean by 'not hitting the proper line of code'? SubRegistry is in the Standard Java Libraries. Which line is it not hitting?

I'm not familiar with the factory tutorial. A little more detail about the SlopeFactory class.

My understanding of the usage of the ServiceRegistery class, of which FactoryRegistery is a child; is that you define an interface and a text file under META-INF/services with the fully qualified name of the interface containing concrete instances of this interface.

Is this what you have done? Am I missing something?

Brett

From: Paige M. Baldassaro [mailto:pbaldassaro-6E/Yw2RrpZBWk0Htik3J/w< at >public.gmane.org]
Sent: Thursday, 23 May 2013 9:45 AM
To: geotools-gt2-users-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f< at >public.gmane.org
Subject: [Geotools-gt2-users] Factory Tutorial

I am trying to use the factory tutorial. I have created my factory just fine. However, when I try to register it, the iterator is always empty. It seems to not hit the proper line of code when registering th

Factory Tutorial

Paige M. Baldassaro — 2013-05-22T23:45:03

I am trying to use the factory tutorial. I have created my factory just fine. However, when I try to register it, the iterator is always empty. It seems to not hit the proper line of code when registering the subRegistry. Any help would be greatly appreciated.
Paige
               Set categories = Collections.singleton(SlopeFactory.class);
       FactoryRegistry registry = new FactoryRegistry(categories);

       Iterator it = registry.getServiceProviders(SlopeFactory.class, false);
       if  (!it.hasNext())
       {
              System.out.println("Iterator is empty");
}
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Re: JTS/Graph Question

Alexander Melchior — 2013-05-22T02:21:49

Hi Brandon,

I've read back a wee bit, and you might have answered these things already,
but I don't seem to able to find them so here goes:
* From your description I understand you effectively want to find all the
vertices that are unique (or those that aren't..). Is this correct?
* Why use a library the see if two points are at the same location? Is your
data input "forcing" you to use something like JTS?

Cheers,

Alexander

On 20 May 2013 22:23, brandon willard <brandonwillard-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org> wrote:

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GeoTools-GT2-Users

Leaks with WFS/GML Schema handling (8.7)

Tom Kunicki — 2013-05-21T16:17:56

We're experiencing heap leaks that appear to be related to WFS/GML schema handling.  We are currently running with GeoTools 8.7.

For background we're running a WPS server utilizing GeoTools to parse and model WFS inputs. These WFS inputs can come from a number of sources, so we deal with a large number of different schemas.  Via heap analysis, it appears we're leaking ~250 MB of schema related object instances into heap each week.   The processes running on this machine can take days to complete so a "prescribed reboot" is not an ideal option so we'd prefer to resolve the leak.

I've looked for resolutions and i've been able to come up with a reference to GEOT-3473 (http://jira.codehaus.org/browse/GEOT-3473).  The issue addressed appears to relate to leaks during unit testing, but it's not clear how one would properly clean up schema objects for a production system.  There's a comment in the GEOT-3473 there stating that no one would ever be parsing a large number of different schemas on a production system

Re: Got to bottom of bug with arcsde plugin but less certain on fixing it.

Ben Caradoc-Davies — 2013-05-21T03:52:34

As soon as we start discussing the implementation, we should probably be 
on the geotools-devel list; are you subscribed?

This is where the arcsde module suffers from not being one of the jdbc 
modules, where this problem is solved be keeping two feature types: the 
one used for handling the query and the one to be returned. Have a look 
in gt-jdbc JDBCFeatureSource.buildQueryAndReturnFeatureTypes, where 
these types are constructed. Also, for SQL sources, queries are split 
into the pre and post filters, pre being converted to SQL, and post the 
parts that cannot be and are to be filtered in Java. Because filtering 
might need more properties than are required to be returned, a feature 
type is created to include these extra properties. I do not know if 
arcsde does filter splitting.

Kind regards,
Ben.

On 21/05/13 11:00, Phil Scadden wrote:

Got to bottom of bug with arcsde plugin but less certain on fixing it.

Phil Scadden — 2013-05-21T03:00:42

If you extract from arcSDE with a spatial filter, (BBOX,POLYGON) then it 
is filtered twice. The query to arcSDE has the spatial constraint so the 
correct no. of records is returned. However, in 
"FilteringFeatureReader.hasNext() we have:

             while (featureReader.hasNext()) {
                 peek = featureReader.next();

                 if (filter.evaluate(peek)) {
                     next = peek;
                     return true;
                 }
             }

The filter is evaluated by filter.evaluate. In most cases, the all will 
pass.

However, consider requesting only non-spatial attributes from the query. 
Ie SHAPE is not part of feature. The sde query still returns the correct 
no. of records, but filter.evaluate fails because it cant find the SHAPE 
property in the feature.

So how to fix? Ideally, when arcSDE can do the spatial operation, then 
filter shouldnt be needed. However, the same problem would then arise 
when the spatial operator is one that JTS can handle but arcSDE cant

Re: Problems building 9.2 from sourceforgesnapshot.

Ben Caradoc-Davies — 2013-05-21T02:55:15

For the record: GeoTools master builds cleanly for me with OpenJDK 7 on 
Linux, even with -Dall.

mvn -s /path/to/localRepository/settings.xml -nsu -fae 
-Dfork.javac=false -Djava.awt.headless=true -Dtest.maxHeapSize=256m 
-Dtest.maxPermSize=128m -Dall -DdownloadSources=true clean install 
eclipse:clean eclipse:eclipse

Apache Maven 3.0.5 (r01de14724cdef164cd33c7c8c2fe155faf9602da; 
2013-02-19 21:51:28+0800)
Maven home: /home/car605/junk/java/maven3
Java version: 1.7.0_21, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-7-openjdk-amd64/jre
Default locale: en_GB, platform encoding: UTF-8
OS name: "linux", version: "3.8-2-amd64", arch: "amd64", family: "unix"

This test used openjdk-7-jdk:amd64 7u21-2.3.9-5 on debian/sid.

Kind regards,

Re: Problems building 9.2 from sourceforgesnapshot.

Ben Caradoc-Davies — 2013-05-21T01:51:05

Aha! Java 7 is not yet a supported platform. If you are still getting 
build failures, please try Oracle Java 6 (JDK 1.6). Please also report 
these failures in Jira (or check to see if they have already been 
reported), as there are some developers trying to get GeoTools to build 
with JDK 7.

Kind regards,

Re: JTS/Graph Question

brandon willard — 2013-05-20T21:23:40

I checked out JCS, but there was an odd dependency on JUMP and GUI-based
operations.   I ultimately cannot use a GUI, so it's really just the API
I'm interested in; however, JCS' API was rather difficult to directly
connect to my sequence of needs.  Looking through the source did provide
some insight, though.

Now, I'm at a point where my requirements are better understood, so I'll
try to clarify:

   1. A set of input LineStrings need to be noded and/or snapped along
   their overlapping (within a tolerance) and co-directional segments only.
   2. When LineStrings are noded/snapped, ShapeIds and a length index
   (relative to the parent LineString) need to be mapped to the resulting
   LineStrings.

I've found most of what I need in JTS, like snapping through
GeometrySnapper and noding through a custom SegmentStringMerger,
IntersectionAdder and SegmentStringDisolver, but the former doesn't make
for easy/any mapping or length indexing, and with the latter it's not
apparent how one would "snap" (i.e. remove/d

Re: Problems building 9.2 from sourceforge snapshot.

Phil Scadden — 2013-05-20T21:05:08

Sorry,
Apache Maven 3.0.4 (r1232337; 2012-01-17 21:44:56+1300)
Maven home: C:\Program Files\NetBeans 7.2\java\maven\bin\..
Java version: 1.7.0_07, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.7.0_07\jre
Default locale: en_NZ, platform encoding: Cp1252
OS name: "windows 7", version: "6.1", arch: "amd64", family: "windows"

Re: How to get longitude,latitude value when user click on map

tawisak — 2013-05-20T14:51:50

 i found this code.
but how can i get value of start,end when user click on the map.

                CoordinateReferenceSystem crs = DefaultGeographicCRS.WGS84; 
                GeodeticCalculator calc = new GeodeticCalculator(crs);
                System.out.println(calc.getStartingPosition());
                System.out.println(calc.getEllipsoid());             
                calc.setStartingPosition( JTS.toDirectPosition( start, crs )
);
                calc.setDestinationPosition( JTS.toDirectPosition( end, crs
) );
                double distance = calc.getOrthodromicDistance();
                int totalmeters = (int) distance;
                int km = totalmeters / 1000;
                int meters = totalmeters - (km * 1000);
                float remaining_cm = (float) (distance - totalmeters) *
10000;
                remaining_cm = Math.round(remaining_cm);
                float cm = remaining_cm / 100;
                
                System.out.println("Distance = " + km + "km " + meters + "m
"

Re: The serializablility of features

Alexander Melchior — 2013-05-20T13:10:29

Hi James,

On 19 May 2013 20:44, James Hughes <jnh5y-drpRVWUr82I< at >public.gmane.org> wrote:


Unfortunately in a DCEL a node != a feature, nor does a node have a prev or
next. My faces contain the feature (or reference to, since java doesn't
have pointers). All the half-edges have references to their prev, next abd
twin half-edge, incident face (which contains the feature) and their origin
node/vertice. Nodes (or vertices) contain a reference to one of their
adjacent half-edges.

As far as I've been able to deduct the problem isn't writing the features,
this is done pretty quickly. The big heap of references does seem to be a
problem thou... :/.

Effectively, I want to flip the idea from think of a List of SimpleFeatures

Currently it is the latter. From your first remark I take it your thought
about my DCEL data structure is a bit different than what it actually is,
but hopefully my comments will shed some light on it.

I'll leave it as it is by now. As http://xkcd.com/1205/ indicates I've
already spend too m

How to get longitude,latitude value when user click on map

tawisak — 2013-05-20T12:41:25

Hi every body, I want to get lat, long value when user click on the map

GeodeticCalculator GC= new GeodeticCalculator();  
....
....

 System.out.println(longitude);
 System.out.println(latitude);

how can i do next ?

Thank you in advance.

chio



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Re: Problem with WFSDatastore -SAXException / Type not found for OnlineResource

Emmanuel Blondel — 2013-05-20T10:42:32

Ok, I've finally found the problem:
a dependency conflict caused by xml-apis and xml-api-xerces deps.

I've excluded them and it solved the issue.


Le 20/05/2013 01:30, Emmanuel Blondel a écrit :

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GeoTools 9.2 Released

Ben Caradoc-Davies — 2013-05-20T03:26:12

http://geotoolsnews.blogspot.com.au/2013/05/geotools-92-released.html

The GeoTools community is pleased to announce the availability of 
GeoTools 9.2 for download from SourceForge:

http://sourceforge.net/projects/geotools/files/GeoTools%209%20Releases/9.2/geotools-9.2-bin.zip/download

http://sourceforge.net/projects/geotools/files/GeoTools%209%20Releases/9.2/geotools-9.2-doc.zip/download

http://sourceforge.net/projects/geotools/files/GeoTools%209%20Releases/9.2/geotools-9.2-userguide.zip/download

http://sourceforge.net/projects/geotools/files/GeoTools%209%20Releases/9.2/geotools-9.2-project.zip/download

This release has also been deployed to the OSGeo Maven Repository.

Please see the Release Notes for details. This release is made in 
conjunction with GeoServer 2.3.2.

In addition to bug fixes:

- The application schema support (app-schema) module now enables joining 
support by default for data sources that support it; this improvement 
and many bug fixes by Rini Angreani.

- XML parser support for u

Re: Problems building 9.2 from sourceforgesnapshot.

Ben Caradoc-Davies — 2013-05-20T03:12:32

Normally this command produces much more output, including your Maven, 
JDK, and platform information.

Kind regards,

Re: Problems building 9.2 from sourceforge snapshot.

Phil Scadden — 2013-05-20T03:07:10

3.0.4
No strangely. Failing now further up. (gt-referencing - "There was an 
error in the forked process").

HOWEVER. I have managed to successfully get my own test working that 
successfully  queries against an SDE table. Its annoying because it 
comes up "absent Code atttribute in method that is not native or 
abstract" but if then change the pom - add or delete a space - and then 
try again it works. At this stage though, I dont care. I can set up my 
test case and debug into arcsde plugin which is all I want at moment.

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Re: [ExternalEmail] Re: Problems building 9.2 from sourceforgesnapshot.

Ben Caradoc-Davies — 2013-05-20T02:50:21

Please also try again; multithreaded tests such as this one are 
inherently nondeterministic and can occasionally fail when thread 
interactions fall outside those anticipated by the test author.

Kind regards,
Ben.

On 20/05/13 10:19, Ben Caradoc-Davies wrote: