Hi,
JUMP DB Query plugin http://jumpdbqplugin.sourceforge.net/ used to
create a little polygon as a fake geometry for all the lines which the
SQL query was returning without a geometry. Now the new versions of the
plugin, starting from version 0.7.2. are creating an empty geometry as
"GEOMETRYCOLLECTION EMPTY".
This works fine as long as I am working with OpenJUMP and also saving
into JUMP jml format goes OK. But saving into shapefiles gives problems
and I have not discovered how I could keep the important attribute data
that I have also for the features without geometry.
If there are no other geometries on the layer, the OJ message while
doing shapefile save is
java.lang.Exception: Could not determine shapefile type - data is either
all GeometryCollections or empty
at
com.vividsolutions.jump.io.ShapefileWriter.makeSHAPEGeometryCollection(S
hapefileWriter.java:728)
at
com.vividsolutions.jump.io.ShapefileWriter.write(ShapefileWriter.java:29
5)
at
com.vividsolutions.jump.io.datasource.ReaderWriterFileDataSource$1.execu
teUpdate(ReaderWriterFileDataSource.java:72)
at
com.vividsolutions.jump.workbench.datasource.AbstractSaveDatasetAsPlugIn
.run(AbstractSaveDatasetAsPlugIn.java:33)
at
com.vividsolutions.jump.workbench.ui.task.TaskMonitorManager$TaskWrapper
.run(TaskMonitorManager.java:151)
at java.lang.Thread.run(Unknown Source)
If there are also real geometries then the message is
om.vividsolutions.jump.io.IllegalParametersException: mixed geometry
types found, please separate Polygons from Lines and Points when saving
to *.shp
at
com.vividsolutions.jump.io.ShapefileWriter.checkIfGeomsAreMixed(Shapefil
eWriter.java:639)
at
com.vividsolutions.jump.io.ShapefileWriter.write(ShapefileWriter.java:25
3)
at
com.vividsolutions.jump.io.datasource.ReaderWriterFileDataSource$1.execu
teUpdate(ReaderWriterFileDataSource.java:72)
at
com.vividsolutions.jump.workbench.datasource.AbstractSaveDatasetAsPlugIn
.run(AbstractSaveDatasetAsPlugIn.java:33)
at
com.vividsolutions.jump.workbench.ui.task.TaskMonitorManager$TaskWrapper
.run(TaskMonitorManager.java:151)
at java.lang.Thread.run(Unknown Source)
Is it possible to save things without geometries into shapefiles at all?
It is easy to generate test data, just create a new layer and insert a
new WKT feature as GEOMETRYCOLLECTION EMPTY and try to save the layer.
Next digitise a point, for example, on the layer, and try saving again.
-Jukka Rahkonen-
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