Have a look in the specification they define them as functions there (hence the
classes you found). se:Categorize extends se:Function (where se:Function can
have a default value if the function is not supported).
Jody
On 03/12/2010, at 5:05 AM, Justin Deoliveira wrote:
> Hi all,
>
> Recently I have started working on bindings for se 1.1 in order to implement
> a paser/encoder for se 1.1 and sld 1.1. I have a question regarding color
> maps.
>
> In SLD 1.0 a color map is defined as:
>
> <xsd:element name="ColorMap">
> <xsd:annotation>
> <xsd:documentation> A "ColorMap" defines
> either the colors of a pallet-type raster source or
> the mapping of numeric pixel values to colors.
> </xsd:documentation>
> </xsd:annotation>
> <xsd:complexType>
> <xsd:choice minOccurs="0" maxOccurs="unbounded">
> <xsd:element ref="sld:ColorMapEntry"/>
> </xsd:choice>
> </xsd:complexType>
> </xsd:element>
>
> In SE 1.1 a color map is defined as:
>
> <xsd:complexType name="ColorMapType">
> <xsd:choice>
> <xsd:element ref="se:Categorize"/>
> <xsd:element ref="se:Interpolate"/>
> </xsd:choice>
> </xsd:complexType>
> <xsd:complexType name="CategorizeType">
> <xsd:complexContent>
> <xsd:extension base="se:FunctionType">
> <xsd:sequence>
> <xsd:element ref="se:LookupValue"/>
> <xsd:element ref="se:Value"/>
> <xsd:sequence maxOccurs="unbounded" minOccurs="0">
> <xsd:element ref="se:Threshold"/>
> <xsd:element ref="se:Value"/>
> </xsd:sequence>
> </xsd:sequence>
> <xsd:attribute name="threshholdsBelongTo"
> type="se:ThreshholdsBelongToType" use="optional"/>
> </xsd:extension>
> </xsd:complexContent>
> </xsd:complexType>
> <xsd:complexType name="InterpolateType">
> <xsd:complexContent>
> <xsd:extension base="se:FunctionType">
> <xsd:sequence>
> <xsd:element ref="se:LookupValue"/>
> <xsd:element maxOccurs="unbounded"
> ref="se:InterpolationPoint"/>
> </xsd:sequence>
> <xsd:attribute name="mode" type="se:ModeType"/>
> <xsd:attribute name="method" type="se:MethodType"/>
> </xsd:extension>
> </xsd:complexContent>
> </xsd:complexType>
>
>
> Quite a different structure. My question is what sorts of objects this should
> be parsed into. The ColorMap class as it exists seems more or less just a
> list of color entries, mirroring the sld 1.0 structure. But I also found a
> few classes living in the render package that mirror the SE structure:
>
> org.geotools.filter.visitor.Categorize
> org.geotools.filter.visitor.Interpolate
>
> These two are interfaces that extend Function but seem to have no
> implementation. However these two classes:
>
> org.geotools.filter.CategorizeFunction
> org.geotools.filter.InterpolateFunction
>
> Which seem to be related, although the classes don't implement the
> interfaces, they are direct implementations of Function.
>
> So... i am not sure what to do. Should I try to mash the new concepts into
> the existing ColorMap class... or should i try to use these new classes? I
> see Jody's name riddled on a few of those classes so hopefully he or others
> more familiar with se can provide some context.
>
> Thanks!
>
> -Justin
>
> --
> Justin Deoliveira
> OpenGeo - http://opengeo.org
> Enterprise support for open source geospatial.
>
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