I'm using GeoServer 2.3.3 and I created a point symbolyzer which puts an open
arrow on the end point of a line. This works great and is lightning fast. But I
wonder if it's somehow possible to put the arrow at the center of the end
segment instead of the end point? Even better (for our use case) would be to
put the arrow in the center of the central segment (with the correct rotation),
but that's just a nice to have. I would be more than happy with the center of
the end segment.
In an attempt to get an arrow in the center of the line, I started playing with
using an arrow symbol as a label. With a little bit of googling I ended up with
the text symbolizer at the bottom which puts the arrow exactly where I want it
to be. But my concern is what about the orientation of the arrow? Our lines
have a direction: every geometry goes from start point to end point. I think
labeling doesn't care about it. Its main concern is putting the label along the
line. Can I make sure the labels get oriented based on the direction of each
line?
My text symbolizer:
<TextSymbolizer>
<Label>
<ogc:Literal>→</ogc:Literal>
</Label>
<Font>
<CssParameter name="font-family">Lucida Sans</CssParameter>
<CssParameter name="font-size">18</CssParameter>
<CssParameter name="font-style">normal</CssParameter>
<CssParameter name="font-weight">bold</CssParameter>
</Font>
<LabelPlacement>
<LinePlacement>
<PerpendicularOffset>-2</PerpendicularOffset>
</LinePlacement>
</LabelPlacement>
<Fill>
<CssParameter name="fill">#000000</CssParameter>
</Fill>
<VendorOption name="followLine">true</VendorOption>
<VendorOption name="maxDisplacement">400</VendorOption>
<VendorOption name="repeat">150</VendorOption>
</TextSymbolizer>
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