Thank you Ian,
That's the style I get and indeed it looks right:
======================================
<sld:PointSymbolizer>
<sld:Geometry>
<ogc:PropertyName>the_geom</ogc:PropertyName>
</sld:Geometry>
<sld:Graphic>
<sld:Mark>
<sld:WellKnownName>Circle</sld:WellKnownName>
<sld:Fill>
<sld:CssParameter name="fill">
<ogc:Function name="Categorize">
<ogc:PropertyName>value</ogc:PropertyName>
<ogc:Literal>30.0</ogc:Literal>
<ogc:Literal>#00FF00</ogc:Literal>
<ogc:Literal>100.0</ogc:Literal>
<ogc:Literal>#FF0000</ogc:Literal>
<ogc:Literal>preceding</ogc:Literal>
</ogc:Function>
</sld:CssParameter>
<sld:CssParameter name="fill-opacity">1.0</sld:CssParameter>
</sld:Fill>
<sld:Stroke/>
</sld:Mark>
</sld:Graphic>
</sld:PointSymbolizer>
======================================
Still I get empty circles when wrapping this symbolizer into a style.. U_U
I am applying no filters to the wrapping rule.
Anyone ever managed to apply one of these functions to a feature?
-Piero
On 3 May 2016 at 21:27, Ian Turton <[email protected]> wrote:
> I got as far as the following code:
>
> List<Expression> categories = new ArrayList<>();
> categories.add(ff.property("value"));
>
> for (int i = 0; i < colors.length; ++i) {
> categories.add(ff.literal(thresholds[i]));
> categories.add(
> ff.literal(String.format("#%02X%02X%02X", colors[i].getRed(),
> colors[i].getGreen(), colors[i].getBlue())));
> }
> categories.add(ff.literal("preceding"));
> Function ctgFun =ff.function("Categorize",categories.toArray(new
> Expression[] {}));
> //Function ctgFun = new CategorizeFunction(categories,
> ff.literal("#0000FF"));
> mark.setFill(sf.createFill(ctgFun, ff.literal(1.0)));
>
> graphic.graphicalSymbols().clear();
> graphic.graphicalSymbols().add(mark);
>
> PointSymbolizer ps = sf.createPointSymbolizer(graphic, "the_geom");
>
> which generates the following SLD:
>
> <sld:Graphic>
> <sld:Mark>
> <sld:WellKnownName>Circle</sld:WellKnownName>
> <sld:Fill>
> <sld:CssParameter name="fill">
> <ogc:Function name="Categorize">
>
> <ogc:PropertyName>Attribute</ogc:PropertyName>
>
> <ogc:PropertyName>value</ogc:PropertyName>
> <ogc:Literal>30.0</ogc:Literal>
> <ogc:Literal>#00FF00</ogc:Literal>
> <ogc:Literal>100.0</ogc:Literal>
> <ogc:Literal>#FF0000</ogc:Literal>
> <ogc:Literal>preceding</ogc:Literal>
> </ogc:Function>
> </sld:CssParameter>
> </sld:Fill>
> <sld:Stroke/>
> </sld:Mark>
> </sld:Graphic>
> </sld:PointSymbolizer>
>
> Which looks promising, to be honest I can't see if the preceding or
> succeeding flags are required (the default seems to be succeeding).
>
> Ian
>
> On 3 May 2016 at 12:49, Piero Campalani <[email protected]> wrote:
>
>>
>> [Sorry, I prematurely hit "Send"]
>>
>> Thanks Ian, that's of great help. !
>>
>> So far, looking at the SLD examples you posted, I crafted a categorized
>> style this way:
>>
>> ================================================
>>
>> double[] thresholds = new double[] { 30, 100 };
>> Color[] colors = new Color[] { Color.GREEN, Color.RED };
>>
>> StyleFactory sf =
>> CommonFactoryFinder.getStyleFactory(GeoTools.getDefaultHints());
>> FilterFactory2 ff =
>> CommonFactoryFinder.getFilterFactory2(GeoTools.getDefaultHints());
>>
>> Graphic graphic = sf.getDefaultGraphic();
>> Mark mark = sf.getCircleMark();
>>
>> List<Expression> categories = new ArrayList<>();
>> categories.add(ff.property("value"));
>>
>> for (int i = 0; i < colors.length; ++i) {
>> categories.add(ff.literal(thresholds[i]));
>> categories.add(ff.literal(
>> String.format("#%02X%02X%02X", colors[i].getRed(),
>> colors[i].getGreen(), colors[i].getBlue());)));
>> }
>>
>> Function ctgFun = new CategorizeFunction(categories,
>> ff.literal("#0000FF"));
>> mark.setFill(sf.createFill(ctgFun, ff.literal(1.0)));
>>
>> graphic.graphicalSymbols().clear();
>> graphic.graphicalSymbols().add(mark);
>>
>> PointSymbolizer ps = sf.createPointSymbolizer(graphic,
>> GEOM_PROPERTY);
>> ================================================
>>
>> On the other side, my feature has the "value" attribute set.
>> However I can only see the default black-border circles: color categories
>> are not applied seemingly.
>>
>> Any hint?
>> Any wrong step in the above procedure?
>>
>> On 3 May 2016 at 13:42, Piero Campalani <[email protected]> wrote:
>>
>>> Thanks Ian, that's of great help. !
>>>
>>> So far, I crafted a categorized style this way:
>>>
>>> ================================================
>>>
>>> Graphic graphic = sf.getDefaultGraphic();
>>> Mark mark = sf.getCircleMark();
>>>
>>> List<Expression> categories = new ArrayList<>();
>>> categories.add(ff.property("value"));
>>>
>>> for (int i = 0; i < colors.length; ++i) {
>>> categories.add(ff.literal(thresholds[i]));
>>>
>>> categories.add(ff.literal(FormatUtils.colorToHashedHexs(colors[i])));
>>> }
>>>
>>> Function ctgFun = new CategorizeFunction(categories,
>>> ff.literal("#0000FF")); // FIXME remove fallback
>>> mark.setFill(sf.createFill(ctgFun, ff.literal(fillOpacity)));
>>> // mark.setStroke(sf.createStroke(
>>> // ff.literal(color), ff.literal(strokeOpacity)));
>>> graphic.graphicalSymbols().clear();
>>> graphic.graphicalSymbols().add(mark);
>>>
>>> PointSymbolizer ps = sf.createPointSymbolizer(graphic,
>>> GEOM_PROPERTY);
>>> ================================================
>>>
>>>
>>> On 2 May 2016 at 12:52, Ian Turton <[email protected]> wrote:
>>>
>>>> What you want can probably be achieved by using a categorize function -
>>>> see
>>>> http://docs.geoserver.org/latest/en/user/styling/sld-tipstricks/transformation-func.html
>>>> for more details of how it works.
>>>>
>>>> Ian
>>>>
>>>
>>>
>>>
>>
>
>
> --
> Ian Turton
>
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