[Geoserver-users] Adding/creating new Shape symbols

[Raif S. Naffah]

hi all,

i'm looking at adding few new Shape Symbols [1] to the current default
set to allow some shapes (the first 7) to appear _denser_ than the
current ones at the same Mark's Size.

i understand that i can obtain the same effect by using smaller Size
values (e.g. 8 instead of 16) however and b/c my SLDs are generated w/
FreeMarker and already use Transformation Functions [2] for selecting
the Shape to use as the WellKnownName value i believe i need to use the
same Size value for all resulting shapes.

here is a fragment of such SLD to illustrate what i'm talking about:

...
<sld:GraphicFill>
<sld:Graphic>
<sld:Mark>
<WellKnownName>
<ogc:Function name="Recode">
<ogc:PropertyName>V</ogc:PropertyName>
<#list vfValues as paint>
<ogc:Literal>${thresholds[paint_index]}</ogc:Literal>
<ogc:Literal>${paint}</ogc:Literal>
</#list>
</ogc:Function>
</WellKnownName>
<sld:Stroke>
<CssParameter name="stroke">#d3d3d3</CssParameter>
<CssParameter name="stroke-width">1</CssParameter>
</sld:Stroke>
</sld:Mark>
<sld:Size>16</sld:Size>
</sld:Graphic>
</sld:GraphicFill>
...

would appreciate any pointers to where i can add those new graphics or
the module/class where they are (programmatically) created and
registered.

TIA + cheers;


[1]
http://docs.geoserver.org/stable/en/user/styling/sld/extensions/pointsymbols.html
[2]
http://docs.geoserver.org/stable/en/user/styling/sld/tipstricks/transformation-func.html#categorize
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[Andrea Aime]

Post by Raif S. Naffah
hi all,
i'm looking at adding few new Shape Symbols [1] to the current default
set to allow some shapes (the first 7) to appear _denser_ than the
current ones at the same Mark's Size.
i understand that i can obtain the same effect by using smaller Size
values (e.g. 8 instead of 16) however and b/c my SLDs are generated w/
FreeMarker and already use Transformation Functions [2] for selecting
the Shape to use as the WellKnownName value i believe i need to use the
same Size value for all resulting shapes.

I don't see why? The same size means the spacing will be the same, size
is absolute, it's not a scaling factor.

Mind, shapes are commonly normalized to size 1 and then scaled from there
to the size specified in the so unless you're taking special measures you
probably won't get the desired result.

Post by Raif S. Naffah
would appreciate any pointers to where i can add those new graphics or
the module/class where they are (programmatically) created and
registered.

http://docs.geotools.org/stable/javadocs/org/geotools/renderer/style/MarkFactory.html
http://docs.geotools.org/stable/userguide/library/render/icon.html

(and then look in the code for implementors of that interface).

Regards,

Andrea Aime

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