GEOSERVER COOKBOOK PDF

A polygon can be thought of as an irregularly-shaped point and is styled in similar ways to points. The code examples shown on this page are not the full SLD code , as they omit the SLD header and footer information for the sake of brevity. Please use the links to download the full SLD for each example. The polygons layer used below contains county information for a fictional country.

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A polygon can be thought of as an irregularly-shaped point and is styled in similar ways to points. The code examples shown on this page are not the full SLD code , as they omit the SLD header and footer information for the sake of brevity.

Please use the links to download the full SLD for each example. The polygons layer used below contains county information for a fictional country. For reference, the attribute table for the polygons is included below. Download the polygons shapefile. View and download the full "Simple polygon" SLD. All subsequent examples will share this characteristic unless otherwise specified.

The light-colored borders around the polygons in the figure are artifacts of the renderer caused by the polygons being adjacent. There is no border in this style. This example adds a 2 pixel white stroke to the Simple polygon example.

View and download the full "Simple polygon with stroke" SLD. View and download the full "Transparent polygon" SLD. The value of 0. In this example, since the background is white, the dark blue looks lighter. Were the points imposed on a dark background, the resulting color would be darker. View and download the full "Inner offset lines" SLD.

Line 14 controls the buffering distance, setting a inner buffer of 2 pixels. View and download the full "Graphic fill" SLD. This style fills the polygon with a tiled graphic. Although a full URL could be specified if desired, no path information is necessary in line 11 because this graphic is contained in the same directory as the SLD.

Line 13 determines the height of the displayed graphic in pixels; if the value differs from the height of the graphic then it will be scaled accordingly while preserving the aspect ratio. Hatching is not part of the standard SLD 1. View and download the full "Hatching fill" SLD. Line 10 sets the color to purple , line 11 sets the width of the hatches to 1 pixel, and line 14 sets the size of the tile to 16 pixels. This example shows a text label on the polygon.

In the absence of any other customization, this is how a label will be displayed. View and download the full "Polygon with default label" SLD.

The fill of the polygon is set on line 5 to a light green 40FF40 while the stroke of the polygon is set on lines to white FFFFFF with a thickness of 2 pixels. Refer to the attribute table in the Example polygons layer section if necessary.

All other details about the label are set to the renderer default, which here is Times New Roman font, font color black, and font size of 10 pixels. This example alters the look of the Polygon with default label by adding a white halo to the label. View and download the full "Label halo" SLD. This example is similar to the Polygon with default label , with the addition of a halo around the labels on lines A halo creates a color buffer around the label to improve label legibility.

Line 17 sets the radius of the halo, extending the halo 3 pixels around the edge of the label, and line 19 sets the color of the halo to white FFFFFF. Since halos are most useful when set to a sharp contrast relative to the text color, this example uses a white halo around black text to ensure optimum readability.

This example improves the label style from the Polygon with default label example by centering the label on the polygon, specifying a different font name and size, and setting additional label placement optimizations. They are not part of the SLD 1. View and download the full "Polygon with styled label" SLD. Lines set the font styling. Line 22 centers the label vertically in exactly the same way. Finally, there are two added touches for label placement optimization: line 33 ensures that long labels are split across multiple lines by setting line wrapping on the labels to 60 pixels, and line 34 allows the label to be displaced by up to pixels.

This ensures that labels are compacted and less likely to spill over polygon boundaries. Notice little Massive County in the corner, whose label is now displayed. View and download the full "Attribute-based polygon" SLD. Refer to the Example polygons layer to see the attributes for the layer.

This example has eschewed labels in order to simplify the style, but you can refer to the example Polygon with styled label to see which attributes correspond to which polygons. The order of the rules does not matter in this case, since each shape is only rendered by a single rule. The first rule, on lines , specifies the styling of polygons whose population attribute is less than , The color of the polygon fill is set to a light green 66FF66 on line The second rule, on lines , is similar, specifying a style for polygons whose population attribute is greater than or equal to , but less than , The filter is set on lines Notice the And on line 21 and line This mandates that both filters need to be true for the rule to be applicable.

The color of the polygon fill is set to a medium green on 33CC33 on line The third rule, on lines , specifies a style for polygons whose population attribute is greater than or equal to , The color of the polygon fill is the only other difference in this rule, which is set to a dark green on line View and download the full "Zoom-based polygon" SLD.

It is often desirable to make shapes larger at higher zoom levels when creating a natural-looking map. This example varies the thickness of the lines according to the zoom level. Polygons already do this by nature of being two dimensional, but another way to adjust styling of polygons based on zoom level is to adjust the thickness of the stroke to be larger as the map is zoomed in or to limit labels to only certain zoom levels.

Zoom levels or more accurately, scale denominators refer to the scale of the map. A scale denominator of 10, means the map has a scale of , in the units of the map projection. Determining the appropriate scale denominators zoom levels to use is beyond the scope of this example. The scale rule is set on line 40 such that the rule will apply only where the scale denominator is ,, or less. Line 7 defines the fill as blue CC.

Note that the fill is kept constant across all rules regardless of the scale denominator. Lines set the font information to be Arial, 14 pixels, and bold with no italics. The scale rules on lines set the rule such that it will apply to any map with a scale denominator between ,, and ,, The scale rule is set on line 53 such that the rule will apply to any map with a scale denominator of ,, or greater.

The resulting style produces a polygon stroke that gets larger as one zooms in and labels that only display when zoomed in to a sufficient level. GeoServer 2. Warning The code examples shown on this page are not the full SLD code , as they omit the SLD header and footer information for the sake of brevity. Note The light-colored borders around the polygons in the figure are artifacts of the renderer caused by the polygons being adjacent.

Note Determining the appropriate scale denominators zoom levels to use is beyond the scope of this example. Previous : Lines. Next : Rasters. This Page Edit. License Creative Commons Attribution.

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GeoServer Cookbook

Explore a preview version of GeoServer Cookbook right now. GeoServer is one of the founding blocks of the OS-Geo software stack. It helps connect existing information not only to virtual globes, such as Google Earth, but also to web-based maps such as OpenLayers, Google Maps, and Bing Maps. You will start off by learning about the various concepts of vector data used in GeoServer to build maps. You will then learn how to build beautiful maps by using advanced styling methods such as CSS.

HANS LEWY CHALDEAN ORACLES PDF

JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser. GeoServer is one of the founding blocks of the OS-Geo software stack. It helps connect existing information not only to virtual globes, such as Google Earth, but also to web-based maps such as OpenLayers, Google Maps, and Bing Maps.

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