Re: [Geoserver-users] SLD for lots

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There is a tutorial on how to make a function here:
https://docs.geotools.org/stable/userguide/tutorial/function.html

The example shows how to process a geometry (a point in this case).

The geometry object has a geometry.reverse() method that can be used to
change the order from clockwise to counter clockwise.

Looks like there is a method here to force geometry to CCW:
https://javadoc.io/doc/org.locationtech.jts.io/jts-io-common/1.18.1/org/locationtech/jts/io/geojson/OrientationTransformer.html

It would be a useful function to add to GeoTools!

- -
Jody Garnett

On Mon, Aug 19, 2024 at 6:02 PM Humphries, Graham via Geoserver-users <
geo...@li...> wrote:

> A line does not have an inside.
>
> You need to ensure your lines are drawn in the same direction ie:
> clockwise or anti clockwise you could offset from the line to the “inside”
>
> Alternatively, you could create a polygon and then use a spatial operation
> to determine where the inside is.
>
>
>
> I don’t think it is a trivial task.
>
>
>
> Regards,
>
> Graham Humphries
>
>
>
> *From:* Fernando Quadro <fsq...@gm...>
> *Sent:* Tuesday, August 20, 2024 7:06 AM
> *To:* Ian Turton <ijt...@gm...>
> *Cc:* geoserver-users <geo...@li...>
> *Subject:* Re: [Geoserver-users] SLD for lots
>
>
>
> Ian,
>
>
> Yes, it is a line, and how can I invent it so that the information stays
> on the "inside"?
>
>
>
> Best regards,
>
>
> Fernando Quadro
> http://www.fernandoquadro.com.br
> https://www.linkedin.com/in/fernandoquadro/
>
>
>
>
>
> Em qui., 15 de ago. de 2024 às 06:02, Ian Turton <ijt...@gm...>
> escreveu:
>
> If they are lines then you need to reverse the ones where they are on the
> "wrong" side
>
>
>
> Ian
>
>
>
> On Wed, 14 Aug 2024 at 23:03, Jody Garnett <jod...@gm...> wrote:
>
> I wonder if you can do a label offset with a negative offset.  You then
> need to ensure the polygons all wind CW. Or positive offset with CCW
> winding.
>
>
>
> What is your data in? Can you check the geometry?
>
> - -
>
> Jody Garnett
>
>
>
>
>
> On Wed, Aug 14, 2024 at 1:10 PM Fernando Quadro <fsq...@gm...>
> wrote:
>
> Hello everyone. I'm creating an SLD for lots and blocks, but I'd like the
> measurements to always be within the polygon, and if you notice, some are
> outside the polygon.
>
>
>
>
>
> Does anyone know if it's possible to do this, or if it's a limitation?
>
> The SLD I'm generating is this:
>
>
>
> <?xml version="1.0" encoding="UTF-8"?>
> <StyledLayerDescriptor xmlns="http://www.opengis.net/sld" version="1.1.0"
> xsi:schemaLocation="http://www.opengis.net/sld
> http://schemas.opengis.net/sld/1.1.0/StyledLayerDescriptor.xsd" xmlns:se="
> http://www.opengis.net/se" xmlns:xlink="http://www.w3.org/1999/xlink"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ogc="
> http://www.opengis.net/ogc">
>   <NamedLayer>
>     <se:Name>geo_medidalote</se:Name>
>     <UserStyle>
>       <se:Name>medidalote</se:Name>
>
>       <se:FeatureTypeStyle>
>
>         <se:Rule>
>
>
>   <se:LineSymbolizer>
>                <se:Stroke>
>               <se:SvgParameter name="stroke">#000000</se:SvgParameter>
>               <se:SvgParameter name="stroke-opacity">0</se:SvgParameter>
>               <se:SvgParameter name="stroke-width">1</se:SvgParameter>
>               <se:SvgParameter
> name="stroke-linejoin">bevel</se:SvgParameter>
>               <se:SvgParameter
> name="stroke-linecap">square</se:SvgParameter>
>             </se:Stroke>
>
>           </se:LineSymbolizer>
>
>         </se:Rule>
>
>         <se:Rule>
>
>           <MaxScaleDenominator>8000</MaxScaleDenominator>
>
>           <se:TextSymbolizer>
>
>             <se:Label>
>               <ogc:PropertyName>comprimento</ogc:PropertyName>
>             </se:Label>
>
>             <se:Font>
>               <se:SvgParameter name="font-family">Arial</se:SvgParameter>
>               <se:SvgParameter name="font-size">8</se:SvgParameter>
>             </se:Font>
>
>             <se:LabelPlacement>
>
>               <se:LinePlacement>
>
>                 <se:PerpendicularOffset>10</se:PerpendicularOffset>
>                 <se:GeneralizeLine>true</se:GeneralizeLine>
>               </se:LinePlacement>
>
>               <VendorOption name="forceLeftToRight">false</VendorOption>
>
>             </se:LabelPlacement>
>
>             <se:Fill>
>               <se:SvgParameter name="fill">#323232</se:SvgParameter>
>             </se:Fill>
>
>           </se:TextSymbolizer>
>
>         </se:Rule>
>
>       </se:FeatureTypeStyle>
>     </UserStyle>
>   </NamedLayer>
> </StyledLayerDescriptor>
>
>
>
> Best regards,
>
>
> Fernando Quadro
> http://www.fernandoquadro.com.br
> https://www.linkedin.com/in/fernandoquadro/
>
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>
> If you want to request a feature or an improvement, also see this:
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>
>
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> Please make sure you read the following two resources before posting to
> this list:
> - Earning your support instead of buying it, but Ian Turton:
> http://www.ianturton.com/talks/foss4g.html#/
> - The GeoServer user list posting guidelines:
> http://geoserver.org/comm/userlist-guidelines.html
>
> If you want to request a feature or an improvement, also see this:
> https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer
>
>
> Geo...@li...
> https://lists.sourceforge.net/lists/listinfo/geoserver-users
>
>
>
> --
>
> Ian Turton
>
>
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> Please make sure you read the following two resources before posting to
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> - The GeoServer user list posting guidelines:
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>
> If you want to request a feature or an improvement, also see this:
> https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer
>
>
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