Good evening,
Please excuse me from the previous post, this is the first time for me as I
joined a mailing list.
I'm french so please forgive my poor English.
So i got a lot of problem with GeoTools. Actually I'm using GeoTools 2.7.4. I
work for nearly three weeks on this library and I only now understand GeoTools.
I have to make a software that allows me to load a shapefile DOT representative
of features. And
when I click on a feature, I have to change the color of the point and
draw a circle of 50km radius around and retrieve all feature in this
cercle.Ensuite I compare feature that was clicking at any other feature
of the circle and retrieve only those with a corresponding variable (where
"OSTRALHER" = '5 'AND mesureCount> '0').
The corresponding feature should also be colorful. Moreover, when click a table
(JTable) should appear. The JTable must contain one line of feature previously
recovered.
And finally, I have to do mathematical calculations and displays features of
the curves. But his is good, all part of the graph, I managed.
Moving to the small problem I encountered:
-----> I followed the tutorial for display and loading the shapefile. PERFECT =
D
------> I took a second tutorial (
http://www.opensourcejavaphp.net/java/geotools/org/geotools/demo/SelectionLab.java.html)
to select one feature at a click on the JMapPane. NOT PERFECT = / Let me
explain I have a compilation error in this online tutorial:
mapFrame = new JMapFrame (map);
Exception in thread "main" java.lang.NullPointerException
Has org.geotools.swing.JMapPane.setTransforms (JMapPane.java: 1114)
Has org.geotools.swing.JMapPane.doSetDisplayArea (JMapPane.java: 607)
Has org.geotools.swing.JMapPane.doSetMapContext (JMapPane.java: 505)
Has org.geotools.swing.JMapPane.setMapContext (JMapPane.java: 472)
Has org.geotools.swing.JMapFrame. <init> (JMapFrame.java: 172)
Has org.geotools.swing.JMapFrame. <init> (JMapFrame.java: 152)
Has SelectionLab.displayShapefile (SelectionLab.java: 117)
Has SelectionLab.main (SelectionLab.java: 94)
So, i can not do anithing else except using the toolbar.INFO Which give me a
JTextArea with all information about the feature.
---> I did not find how to create a circle of 50km with coordinates when i
cliked on the map
--->
I don"t really anderstand how rules and FIlter work ( i already don't
anderstand how to create a simple Filter wich say something like that
SimpleFeatureIterator iter2 = collection.getSchema().getDescriptors();
try{
while (iter2.hasNext()){
SimpleFeature feature = iter2.next();
int nbMesure = ((Integer) feature.getAttribute(21));
if ( nbMesure < 1 ) feature.paint(Color.blue);
if( nbMesure > 500 ) feature.paint(Color.black);
}
}
----->so, I try with a tutorial (MAGIC!) Using a
JTable: http://opensourcejavaphp.net/java/geotools/org/geotools / demo /
QueryLab.java.html
it work perfectly but i wanted to do something without the window Where You
must choose the file size and do things.
private void connect (DataStoreFactorySpi format) throws Exception {
String url = "C: \ \ Users \ \ ASUS U46S \ \ Desktop \ \ RNT
finoct_2011 Data \ \ measures \ \ monShape.shp";
JDataStoreWizard JDataStoreWizard wizard = new (url);
wizard.setFormat (format);
Map <String, Object> connectionParameters
wizard.getConnectionParameters = ();
dataStore DataStoreFinder.getDataStore = (connectionParameters);
if (dataStore == null) {
JOptionPane.showMessageDialog (null, "Could not connect - check
parameters");
}
/ *
int result = wizard.showModalDialog ();
if (result == JWizard.FINISH) {
Map <String, Object> connectionParameters
wizard.getConnectionParameters = ();
dataStore DataStoreFinder.getDataStore = (connectionParameters);
if (dataStore == null) {
JOptionPane.showMessageDialog (null, "Could not connect -
check parameters");
} * /
updateUI ();
}
Obviously i did not work and the "Could not connect - check parameters" I say
the datastore is empty ... aim
this problem is not really important, but better To Have Self-year
parameter and do not ask the user to put again the shapefile ...
If Someone want all my code (a real rough ...), i can send it by mail order on
the post its not pretty =/
Thanks! and sorry for my poor english ...
ptitdje ------------------------------------------------------------------------------
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