[Gvsig_english] Issues on intersection between two polyline layers

[ernesto sferlazza]

Hi all, I want to submit two issues (bugs?) to developers.

First issue: multiple intersections
I want to find all intersections between two different layers of polylines.
To do this, I use the "intersection" algorythm of gvSIG.
The resulting point layer leaves out all multipart intersections (i.e. when
a line of the first layer intersects a polyline of the second layer in more
than one point).
If I perform the same geoprocess with OpenJump, the resulting layer
contains multiple intersections too (one multipart feature for each
multiple intersection), so that I can explode multipoints in many single
features (points) in a subsequent step.
The workaround using gvSIG is to split previously all polylines in single
segments, so to avoid multiple intesections.
Al gvsig versions (1.11, 1.12, 1.2) show the same behaviour.
I think that it is not a good behaviour.

Second issue: intersection between a polyline layer with a clone of itself.
No problem using gvSIG 1.11, while using gvSIG 1.12 (build 1411) it appears
an error message. The corresponding lines in gvSIG.log are the following:
*******
DEBUG Thread-30 com.iver.andami.messages.NotificationManager -
java.lang.ClassCastException: es.unex.sextante.gvsig.gui.ToolboxDialog
cannot be cast to com.iver.cit.gvsig.project.documents.view.gui.View
 at
com.iver.cit.gvsig.geoprocess.core.fmap.AbstractGeoprocess.getResult(AbstractGeoprocess.java:201)
 at
com.iver.cit.gvsig.geoprocess.core.gui.AddResultLayerTask.run(AddResultLayerTask.java:191)
 at
com.iver.utiles.swing.threads.MonitorableDecoratorMainFirst.run(MonitorableDecoratorMainFirst.java:158)
 at com.iver.andami.PluginServices$1.construct(PluginServices.java:405)
 at com.iver.utiles.swing.threads.SwingWorker$2.run(SwingWorker.java:108)
 at java.lang.Thread.run(Unknown Source)
*******
Neverthless, point and line layers are created in the destination folder,
though they are not loaded in the view.

Best regards,
Ernesto

-- 
ing. Ernesto Sferlazza
responsabile nodo provinciale di Agrigento del SITR Sicilia
resp. gruppo Sistema Informativo Territoriale
Provincia regionale di Agrigento
sede istituzionale: piazza Aldo Moro, 1 - 92100 AGRIGENTO
sede operativa: via Acrone, 27 - 92100 AGRIGENTO
cell. 3392718463 (personale)
       3316874296 (aziendale)
tel. uff 0922593752
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