Simple style

The simple style is simillar to QGIS single symbol style.

The simple style is available for all point, line and polygon datasets. Below is the example of generating the simple style for polygon dataset,

# Import and initialized package
from pysld.style import StyleSld
sld = StyleSld(style_name='polygonStyle', geom_type='polygon', fill_color='#ffffff', stroke_color='#333333')

# Generate the simple style
sld.generate_simple_style()

The above code will generate the following sld file,

<StyledLayerDescriptor version="1.0.0" xsi:schemaLocation="http://www.opengis.net/sld StyledLayerDescriptor.xsd" xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <NamedLayer>
        <Name>style</Name>
        <UserStyle>
        <Title>style</Title>
        <FeatureTypeStyle>
    <Rule>
        <PolygonSymbolizer>
            <Fill>
                <CssParameter name="fill">#ffffff</CssParameter>
                <CssParameter name="fill-opacity">1</CssParameter>
            </Fill>
            <Stroke>
                <CssParameter name="stroke">#333333</CssParameter>
                <CssParameter name="stroke-width">1</CssParameter>
            </Stroke>
        </PolygonSymbolizer>
    </Rule>
        </FeatureTypeStyle>
        </UserStyle>
    </NamedLayer>
</StyledLayerDescriptor>

Add feature label

If you want to add the label feature, simple add two more parameters to StyleSld class as below,

# Import and initialized package
from pysld.style import StyleSld
sld = StyleSld(style_name='polygonStyle', geom_type='polygon', fill_color='#ffffff', stroke_color='#333333', feature_label=True, attribute_name_label='name')

# Generate the simple style
sld.generate_simple_style()

The above code will add the additional SLD as below,

<TextSymbolizer>
    <Label>
        <ogc:PropertyName>name</ogc:PropertyName>
    </Label>
    <Font>
        <CssParameter name="font-family">Arial</CssParameter>
        <CssParameter name="font-size">12</CssParameter>
        <CssParameter name="font-style">normal</CssParameter>
        <CssParameter name="font-weight">bold</CssParameter>
    </Font>
    <Fill>
        <CssParameter name="fill">#990099</CssParameter>
    </Fill>
</TextSymbolizer>

Here is the list of available values and their description for simple style,

Available options for simple style

Options for StyleSld

Options	DataType	Default	Description
style_name	string	‘style’	The name of the style file.
geom_type	string	‘polygon’	The type of geometry. The available values are point, line and polygon.
fill_color	string, color code	‘#ffffff’	Fill color for the point or polygon. Not applicable for line.
stroke_color	string, color code	‘#333333’	Stroke color (outline color) for the input geom_type.
stroke_width	numeric	1	Stroke width (outline width) for the input geom_type.
opacity	integer	1	Fill opacity for the point or polygon feature. The value must be between 0 and 1. Not applicable for line.
point_size	numeric	6	The size of the point feature. The parameter will be ignored for polygon and line feature.
well_known_name	string	‘circle’	The name of the shape. Available options are, square, circle, triangle, star, cross and x . The parameter will be ignored for polygon and line feature.
point_rotation	integer	0	Rotation of the point in degree. The value must be between 0-360. The parameter will be ignored for polygon and line feature.
stroke_linecap	string	‘round’	Determines how lines are rendered at their ends. Possible values are butt (sharp square edge), round (rounded edge), and square (slightly elongated square edge). The parameter will be ignored for point and polygon feature.
stroke_dasharray	string	None	Encodes a dash pattern as a series of numbers separated by spaces. Odd-indexed numbers (first, third, etc) determine the length in pxiels to draw the line, and even-indexed numbers (second, fourth, etc) determine the length in pixels to blank out the line. Default is an unbroken line. The parameter will be ignored for polygon and line feature.
perpendicular_offset	integer	None	Perpendicular offset for the line. The parameter will be ignored for point and polygon feature.
feature_label	boolean	False	It determines whether to add the feature label or not. If feature_label is true, then you need to pass the attribute_name_label parameter to label the feature.
attribute_name_label	string	None	The name of the attribute, which you want to label.
font_family	string	‘Aerial’	Font family name for the label. eg. ‘Aerial’, ‘Times new roman’ etc.
font_color	string, color code	‘#333333’	The Font color for the label.
font_size	integer	14	Font size for the label.
font_weight	string	‘normal’	Font weight for the label. Available values are, bold and normal.
font_style	string	‘normal’	Font style for the label. Available values are, normal, italic and oblique.
halo_color	string, color code	‘#ffffff’	The colored background around the label text, which improves readability in low contrast situations.
halo_radius	numeric	1	The halo radius, in pixels.