Choropleth or graduated map

[ebocher]

Existing conformance classes required for this use case:

• basic vector feature styling

Example stylesheet:

Below a CSS encoding to describe a graduated map to display fraction of vegation on a grid (HIGH_VEGETATION_FRACTION property).

*{
  stroke: #000000;
  stroke-width: 1px;
  [HIGH_VEGETATION_FRACTION>=0 OR HIGH_VEGETATION_FRACTION<=0.200]
  {
     fill: yellow;
  };
  [HIGH_VEGETATION_FRACTION>0.200 OR HIGH_VEGETATION_FRACTION<0.500]
  {
     fill: orange;
  };
  [HIGH_VEGETATION_FRACTION>0.500]
  {
     fill: red;
  };
}

Describe any capability not already addressed by existing conformance classes:

Example image illustrating the portrayal use case:

about #17

[maxcollombin]

Mapbox JSON encoding

{
  "version": 8,
  "name": "Default Styler",
  "layers": [
    {
      "filter": [
        ">",
        "HIGH_VEGETATION_FRACTION",
        0.5
      ],
      "id": "",
      "type": "fill"
    },
    {
      "filter": [
        "<=",
        "HIGH_VEGETATION_FRACTION",
        0.5
      ],
      "id": "",
      "type": "fill"
    }
  ]
}

[maxcollombin]

SLD encoding

<?xml version="1.0" encoding="UTF-8"?>
<sld:StyledLayerDescriptor
	xmlns="http://www.opengis.net/sld"
	xmlns:sld="http://www.opengis.net/sld"
	xmlns:gml="http://www.opengis.net/gml"
	xmlns:ogc="http://www.opengis.net/ogc" version="1.0.0">
	<sld:NamedLayer>
		<sld:Name>Default Styler</sld:Name>
		<sld:UserStyle>
			<sld:Name>Default Styler</sld:Name>
			<sld:FeatureTypeStyle>
				<sld:Name>name</sld:Name>
				<sld:Rule>
					<ogc:Filter>
						<ogc:PropertyIsGreaterThan>
							<ogc:PropertyName>HIGH_VEGETATION_FRACTION</ogc:PropertyName>
							<ogc:Literal>0.5</ogc:Literal>
						</ogc:PropertyIsGreaterThan>
					</ogc:Filter>
					<sld:PolygonSymbolizer>
						<sld:Fill>
							<sld:CssParameter name="fill">#ff0000</sld:CssParameter>
						</sld:Fill>
						<sld:Stroke/>
					</sld:PolygonSymbolizer>
				</sld:Rule>
				<sld:Rule>
					<ogc:Filter>
						<ogc:PropertyIsLessThanOrEqualTo>
							<ogc:PropertyName>HIGH_VEGETATION_FRACTION</ogc:PropertyName>
							<ogc:Literal>0.5</ogc:Literal>
						</ogc:PropertyIsLessThanOrEqualTo>
					</ogc:Filter>
					<sld:PolygonSymbolizer>
						<sld:Fill>
							<sld:CssParameter name="fill">#ffff00</sld:CssParameter>
						</sld:Fill>
						<sld:Stroke/>
					</sld:PolygonSymbolizer>
				</sld:Rule>
				<sld:VendorOption name="ruleEvaluation">first</sld:VendorOption>
			</sld:FeatureTypeStyle>
		</sld:UserStyle>
	</sld:NamedLayer>
</sld:StyledLayerDescriptor>

[jerstlouis]

CCSSS Encoding version:

{
  stroke: { black; width: 1px }
  [highVegetationFract between 0 and 0.200]     { fill: { yellow }; };
  [highVegetationFract between 0.200 and 0.500] { fill: { orange }; };
  [highVegetationFract > 0.500]                 { fill: { red } };
}