Hey Larry,
If I create a new layer and add points and a polygon, and right-click
the layer name and select "Save Selected Datasets", I get the error
"Use *** Save Dataset As *** to save layer:New". Then of course when
I try "Save Dataset As" to save as a shapefile, I get the "mixed
geometries error". This is with OJ 1.3.1.
-lreeder
On Fri, Oct 8, 2010 at 3:56 PM, Larry Becker <becker.la...@gmail.com> wrote:
> Hi Michaël,
>
> If you use Save Selected Datasets, OJ already breaks out shapefile layers
> into mutiple files.
>
> regards,
>
> Larry
>
> 2010/10/8 Michaël Michaud <michael.mich...@free.fr>
>>
>> Hi,
>>
>> Agree with Matthias, there are two things.
>>
>> I would consider first one as a OJ bug. OJ could export empty geometries
>> as null shapefiles but it does not (I will fill a bug report).
>>
>> For the mixed shapetype problem, I'm tempted to write a feature request
>> but I'm not sure what I would prefer :
>> - a shapefile exporter which would export mixed shape files in several
>> files (layer-point.shp, layer-line.shp...)
>> - use the Edit>Extract>Extract by geometry type, add an
>> ExportLayersPlugIn able to export several layers without prompting for
>> names
>>
>> Any idea ?
>>
>> Michaël
>>
>> Le 07/10/2010 15:07, Matthias Scholz a écrit :
>> > Hi Jukka,
>> >
>> > I've never used this plugin, but I know this problems with empty
>> > schapefiles.
>> >
>> > In the first case with no geometries it is impossible to determine the
>> > geometry type, which is usualy done from a geometry. The geometry type
>> > is mandatory for writing a schapefile. Byte 32 in the header is the type
>> > field. A solution for such a problem may be a JComboBox to get a valid
>> > type from the user or write the shapefile with type 0 "Null Shape".
>> > Later if we have real geometries in the file we can change the type
>> > field in the header. Don't know if other systems have problems with
>> > "Null Shape" files?
>> >
>> > The second problem with mixed geometries is a design problem of shape
>> > fiiles. At the moment are only one geometry type in one file allowed.
>> > It's possible that this will be changed in the future.
>> > So I see two solutions. Frist you use Edit->Extract->Extract Layers by
>> > Geometry Type and save all the layers manualy. The second possibillity
>> > is that we extend the ShapefileWriter for splitting this automatically.
>> >
>> > You can read this in the specs
>> > http://www.esri.com/library/whitepapers/pdfs/shapefile.pdf. See page 4
>> > and 5.
>> >
>> > Matthias
>> >> 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(ShapefileWriter.java:728)
>> >> at
>> >>
>> >> com.vividsolutions.jump.io.ShapefileWriter.write(ShapefileWriter.java:295)
>> >> at
>> >>
>> >> com.vividsolutions.jump.io.datasource.ReaderWriterFileDataSource$1.executeUpdate(ReaderWriterFileDataSource.java:72)
>> >> at
>> >>
>> >> com.vividsolutions.jump.workbench.datasource.AbstractSaveDatasetAsPlugIn.run(AbstractSaveDatasetAsPlugIn.java:33)
>> >> at
>> >>
>> >> com.vividsolutions.jump.workbench.ui.task.TaskMonitorManager$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(ShapefileWriter.java:639)
>> >> at
>> >>
>> >> com.vividsolutions.jump.io.ShapefileWriter.write(ShapefileWriter.java:253)
>> >> at
>> >>
>> >> com.vividsolutions.jump.io.datasource.ReaderWriterFileDataSource$1.executeUpdate(ReaderWriterFileDataSource.java:72)
>> >> at
>> >>
>> >> com.vividsolutions.jump.workbench.datasource.AbstractSaveDatasetAsPlugIn.run(AbstractSaveDatasetAsPlugIn.java:33)
>> >> at
>> >>
>> >> com.vividsolutions.jump.workbench.ui.task.TaskMonitorManager$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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>> >
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>>
>> ------------------------------------------------------------------------------
>> Beautiful is writing same markup. Internet Explorer 9 supports
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>
>
> ------------------------------------------------------------------------------
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> Spend less time writing and rewriting code and more time creating great
> experiences on the web. Be a part of the beta today.
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------------------------------------------------------------------------------
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standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3.
Spend less time writing and rewriting code and more time creating great
experiences on the web. Be a part of the beta today.
http://p.sf.net/sfu/beautyoftheweb
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