Another idea for a quick solution is to serialize a world file as well.
A world file has only 6 lines, see here
http://en.wikipedia.org/wiki/World_file
class TransportImage implements Serializable {
SerializabelRenderedImage theImage;
Double[] wordlFileLines;
}
That is all you need to construct a georeferenced image.
Simone, what is the quickest way to create a Coverage2D having the lines of
a world file ?
Martin Tomko writes:
> Dear Simone,
> I will try to provide a case for JIRA, somewhere around Monday, no time
> to do it before.
> In the mean time - it is quite urgent for me to find a solution to pass
> the GridCoverrage2D around - could you please elaborate how you would
> serialize the coverage and consequently apply the styling? I only
> applied the styling (I have no need for it), because I was getting the
> error resulting from the lack of color model, or rather the inabiity to
> serialize it.
>
> The approach mentioned by Christian and later Martin:
> new SerializableRenderedImage(outcov.getRenderedImage())
> does seem to only serialize the rendered image. How would one serialize
> the GridCoverage directly? When I tried it, I got the errors resulting
> from the color model, as noted earlier.
> Is there any way to serialize a GeoTiff - that would be a suitable
> alternative.
> HOw are these things done in a WMS/WCS request - there must be some
> serialization happening, and it would probably provide a suitable
> alternative for me.
> Thanks for any help,
> Martin
>
>
> Simone Giannecchini wrote:
>> Martin,
>> you should serialize the coverage prior to the raster symbolizer in
>> case you want to retain the original information of the data.
>>
>> Anyway, if you can provide an isolated test case for this
>> serialization problem along with test data and create a jira for it
>> that would be great, since it sounds like an improvement is needed
>> inside the color map node of the raster symbolizer.
>>
>> Ciao,
>> Simone.
>> -------------------------------------------------------
>> Ing. Simone Giannecchini
>> GeoSolutions S.A.S.
>> Owner - Software Engineer
>> Via Carignoni 51
>> 55041 Camaiore (LU)
>> Italy
>>
>> phone: +39 0584983027
>> fax: +39 0584983027
>> mob: +39 333 8128928
>>
>> http://www.geo-solutions.it
>> http://simboss.blogspot.com/
>> http://www.linkedin.com/in/simonegiannecchini
>>
>> -------------------------------------------------------
>>
>>
>>
>> On Thu, Apr 23, 2009 at 5:42 PM, Martin Tomko <[email protected]>
>> wrote:
>>
>>> Hi Martin,
>>> that is exactly what I was trying to do before:
>>> I get the following error:
>>> Exception in thread "main" java.lang.RuntimeException:
>>> org.geotools.renderer.lite.gridcoverage2d.LinearColorMapNon-serializable
>>> parameter in this operation`s ParameterBlock.
>>> at
>>> javax.media.jai.OperationNodeSupport.writeObject(OperationNodeSupport.java:746)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>> at
>>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>>> at
>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1461)
>>> at
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
>>> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
>>> at
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
>>> at
>>> java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:416)
>>> at javax.media.jai.RenderedOp.writeObject(RenderedOp.java:3004)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>> at
>>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>>> at
>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1461)
>>> at
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
>>> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
>>> at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
>>> at java.util.Hashtable.writeObject(Hashtable.java:824)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>> at
>>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>>> at
>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1461)
>>> at
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
>>> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
>>> at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
>>> at
>>> javax.media.jai.PropertySourceImpl.writeMap(PropertySourceImpl.java:347)
>>> at
>>> javax.media.jai.PropertySourceImpl.writeObject(PropertySourceImpl.java:361)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>> at
>>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
>>> at
>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1461)
>>> at
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
>>> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
>>> at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
>>> at
>>> ch.uzh.geo.tomko.viewshedservice.ViewshedService.toBytesGC(ViewshedService.java:519)
>>>
>>>
>>> It seems to work if I extract the renderedimage:
>>> new SerializableRenderedImage(covoverage.getRenderedImage())
>>>
>>> But then, I am afraid, I am losing the coverage2D capabilities.
>>> I am using the 2.5-snapshot. Seems like the serialization does nto work,
>>> or my rendering is incorrect? (.LinearColorMapNon-serializable parameter
>>> seems to imply that..)
>>> I have a simple thing like this:
>>> <FeatureTypeStyle>
>>> <FeatureTypeName>Feature</FeatureTypeName>
>>> <Rule>
>>> <RasterSymbolizer>
>>> <ColorMap type="ramp" extended="true">
>>> <ColorMapEntry color="#ffffff" quantity="-1.0" opacity="1.0"/>
>>> <ColorMapEntry color="#000000" quantity="0.0" opacity="1.0"/>
>>> <ColorMapEntry color="#ffff00" quantity="1.0" opacity="1.0"/>
>>> <ColorMapEntry color="#00ff00" quantity="2.0" opacity="1.0"/>
>>> <ColorMapEntry color="#00ffff" quantity="3.0" opacity="1.0"/>
>>> <ColorMapEntry color="#0000ff" quantity="4.0" opacity="1.0"/>
>>> <ColorMapEntry color="#ff00ff" quantity="5.0" opacity="1.0"/>
>>> <ColorMapEntry color="#ff0000" quantity="6.0" opacity="1.0"/>
>>> </ColorMap>
>>> <Opacity>1.0</Opacity>
>>> <ChannelSelection>
>>> <GrayChannel>
>>> <SourceChannelName>1</SourceChannelName>
>>> </GrayChannel>
>>> </ChannelSelection>
>>> </RasterSymbolizer>
>>>
>>> thanks
>>> Martin
>>>
>>> Martin Desruisseaux wrote:
>>>
>>>> Martin Tomko a écrit :
>>>>
>>>>
>>>>> Now, I noticed that this approach is *similar*to some test cases in
>>>>> http://svn.geotools.org/trunk/modules/library/coverage/src/test/java/org/geotools/coverage/grid/GridCoverageTestBase.java
>>>>>
>>>>>
>>>>> but in these test cases it does not seem to be necessary to create
>>>>> the new SerializableRenderedImage. Can anyone please comment on this?
>>>>>
>>>> This test case is serializing GridCoverage2D, not RenderedImage. Like
>>>> mentioned in my previous email, GridCoverage2D is already made
>>>> serializable using the technic mentioned by Christian.
>>>>
>>>>
>>>>
>>>>> What I need is the output of a Coverage (or Geotiff, anything that
>>>>> will be contained aas one object and will contain georeferencing
>>>>> information - at least the ReferencedEnvelope).
>>>>> I need to pass the coverage to a remote service that will decode it.
>>>>> The coverage has a ReferencedEnvelope, and that is what I need to be
>>>>> passed with the raw data.
>>>>> I have control over the decoding of the byte[] to an extent, so I can
>>>>> have a less standard way of decoding it.
>>>>>
>>>> If you have a GridCoverage2D instance, you can do:
>>>>
>>>> // Writting
>>>> ByteArrayOutputStream buffer = new ByteArrayOutputStream();
>>>> ObjectOutputStream out = new ObjectOutputStream(buffer);
>>>> out.writeObject(theCoverage);
>>>> out.close();
>>>> byte[] asArray = buffer.getArray();
>>>>
>>>>
>>>> // Reading
>>>> ObjectInputStream in = new ObjectInputStream(new
>>>> ByteArrayInputStream(asArray));
>>>> GridCoverage2D theCoverage = (GridCoverage2D) in.readObject();
>>>> in.close();
>>>>
>>>> Martin
>>>>
>>>>
>>>>
>>> --
>>> Martin Tomko
>>> Postdoctoral Research Assistant
>>>
>>> Geographic Information Systems Division
>>> Department of Geography
>>> University of Zurich - Irchel
>>> Winterthurerstr. 190
>>> CH-8057 Zurich, Switzerland
>>>
>>> email: [email protected]
>>> site: http://www.geo.uzh.ch/~mtomko
>>> mob: +41-788 629 558
>>> tel: +41-44-6355256
>>> fax: +41-44-6356848
>>>
>>>
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>>>
>>
>>
>>
>
>
> --
> Martin Tomko
> Postdoctoral Research Assistant
>
> Geographic Information Systems Division
> Department of Geography
> University of Zurich - Irchel
> Winterthurerstr. 190
> CH-8057 Zurich, Switzerland
>
> email: [email protected]
> site: http://www.geo.uzh.ch/~mtomko
> mob: +41-788 629 558
> tel: +41-44-6355256
> fax: +41-44-6356848
>
>
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