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![Filter Function
1 /**
2 * Convert a Geometry into a buffered centroid
3 * @param value The Feature
4 * @param args A List of arguments
5 * args[0] is the Geometry
6 * args[1] is the buffer distance
7 */
8 def run(value, args) {
9 args[0].centroid.buffer(args[1] as double)
10 }
$DATA_DIR/scripts/function/bufferCentroid.groovy](https://image.slidesharecdn.com/scriptinggeoserver-130910223049-phpapp01/85/Scripting-GeoServer-16-320.jpg)
![Geometry Buffer WPS
1 import geoscript.geom.Geometry
2
3 title = 'Buffer'
4 description = 'Buffers a geometry'
5
6 inputs = [
7 geom: [name: 'geom', title: 'The geometry to buffer', type: Geometry.class],
8 distance: [name: 'distance', title: 'The buffer distance', type: Double.class]
9 ]
10
11 outputs = [
12 result: [name: 'result', title: 'The buffered geometry', type: Geometry.class]
13 ]
14
15 def run(input) {
16 [result: input.geom.buffer(input.distance as double)]
17 }
18
$DATA_DIR/scripts/wps/buffer.groovy](https://image.slidesharecdn.com/scriptinggeoserver-130910223049-phpapp01/85/Scripting-GeoServer-20-320.jpg)
![Voronoi Layer WPS
1 import geoscript.geom.*
2 import geoscript.layer.*
3
4 title = 'VoronoiLayer'
5 description = 'Create a voronoi diagram around the features of a Layer'
6
7 inputs = [
8 layer: [name: 'layer', title: 'The Layer', type: Layer.class],
9 ]
10
11 outputs = [
12 result: [name: 'result', title: 'The voronoi diagram as a Layer', type: Layer.class]
13 ]
14
15 def run(input) {
16 def geoms = new GeometryCollection(input.layer.features*.geom.centroid)
17 def output = new Layer()
18 output.add([geoms.voronoiDiagram])
19 [result: output]
20 }
21
$DATA_DIR/scripts/wps/voronoi.groovy](https://image.slidesharecdn.com/scriptinggeoserver-130910223049-phpapp01/85/Scripting-GeoServer-23-320.jpg)
![Filter Function
1 /**
2 * Convert a Geometry into a buffered centroid
3 * @param value The Feature
4 * @param args A List of arguments
5 * args[0] is the Geometry
6 * args[1] is the buffer distance
7 */
8 def run(value, args) {
9 args[0].centroid.buffer(args[1] as double)
10 }
$DATA_DIR/scripts/function/bufferCentroid.groovy](https://image.slidesharecdn.com/scriptinggeoserver-130910223049-phpapp01/75/Scripting-GeoServer-16-2048.jpg)
![Geometry Buffer WPS
1 import geoscript.geom.Geometry
2
3 title = 'Buffer'
4 description = 'Buffers a geometry'
5
6 inputs = [
7 geom: [name: 'geom', title: 'The geometry to buffer', type: Geometry.class],
8 distance: [name: 'distance', title: 'The buffer distance', type: Double.class]
9 ]
10
11 outputs = [
12 result: [name: 'result', title: 'The buffered geometry', type: Geometry.class]
13 ]
14
15 def run(input) {
16 [result: input.geom.buffer(input.distance as double)]
17 }
18
$DATA_DIR/scripts/wps/buffer.groovy](https://image.slidesharecdn.com/scriptinggeoserver-130910223049-phpapp01/75/Scripting-GeoServer-20-2048.jpg)
![Voronoi Layer WPS
1 import geoscript.geom.*
2 import geoscript.layer.*
3
4 title = 'VoronoiLayer'
5 description = 'Create a voronoi diagram around the features of a Layer'
6
7 inputs = [
8 layer: [name: 'layer', title: 'The Layer', type: Layer.class],
9 ]
10
11 outputs = [
12 result: [name: 'result', title: 'The voronoi diagram as a Layer', type: Layer.class]
13 ]
14
15 def run(input) {
16 def geoms = new GeometryCollection(input.layer.features*.geom.centroid)
17 def output = new Layer()
18 output.add([geoms.voronoiDiagram])
19 [result: output]
20 }
21
$DATA_DIR/scripts/wps/voronoi.groovy](https://image.slidesharecdn.com/scriptinggeoserver-130910223049-phpapp01/75/Scripting-GeoServer-23-2048.jpg)
More Related Content
Scripting GeoServer
- 1.
- 2. GEOSERVER Open Source (GPL)WMS Server Main language is Java Also implements WFS, WCS, WPS, ect... Uses GeoTools and JTS libraries
- 3. Scripting Module Geoserver CommunityModule Developed by: Justin Deoliveira and Tim Schaub I am adding Geoscript Groovy support https://github.com/jericks/geoserver/tree/script_groovy Python, JavaScript, Groovy, BeanShell, Ruby Uses javax.scripting to execute scripts Extend GeoServer on the fly
- 4. Scripting Hooks Applications Web ProcessingServices (WPS) Geospatial web services Rendering Transformations in SLD Filter Functions String, Date, Geometry Functions in SLD
- 5. Script Location $DATA_DIR/scripts/ apps function wps lib Scripts dynamicallyreloaded Python, JavaScript, and Groovy have GeoScript API
- 6. Applications Generic web applicationsor web services Python - WSGI JavaScript - JSGI Groovy - Restlet
- 7. Hello World App 1import org.restlet.data.* 2 3 def run(request, response) { 4 response.setEntity("Groovy rocks!", MediaType.TEXT_PLAIN) 5 } $DATA_DIR/scripts/apps/hello/main.groovy
- 8. Color Brewer App 1import org.restlet.data.* 2 import org.restlet.resource.OutputRepresentation 3 import javax.imageio.ImageIO 4 import geoscript.filter.Color 5 import groovy.xml.MarkupBuilder 6 7 def run(request, response) { 8 String name = request.getResourceRef().getQueryAsForm().getFirstValue("name") 9 if (name) { 10 def image = Color.drawToImage(Color.getPaletteColors(name)) 11 def output = new OutputRepresentation(MediaType.IMAGE_PNG) { 12 void write(OutputStream out) throws IOException { 13 ImageIO.write(image,"png",out) 14 } 15 } 16 response.setEntity(output) 17 } 18 else { 19 def out = new StringWriter() 20 def html = new MarkupBuilder(out) 21 html.html { 22 head { 23 title: "Color Brewer Palettes" 24 } 25 body { 26 h1 "Color Brewer Palettes" 27 ul { 28 Color.paletteNames.each { nm -> 29 li { 30 a href: "colorbrewer?name=${nm}", "${nm}" 31 } 32 } 33 } 34 } 35 } 36 response.setEntity(out.toString(), MediaType.TEXT_HTML) 37 } 38 } $DATA_DIR/scripts/apps/colorbrewer/main.groovy
- 9.
- 10. Function List app 1import org.restlet.data.* 2 import geoscript.filter.Function 3 import groovy.xml.MarkupBuilder 4 5 def run(request, response) { 6 def out = new StringWriter() 7 def html = new MarkupBuilder(out) 8 html.html { 9 head { 10 titie: "Filter Functions" 11 } 12 body { 13 h1 "Filter Function" 14 ul { 15 Function.functionNames.each { nm -> 16 li "${nm}" 17 } 18 } 19 } 20 } 21 response.setEntity(out.toString(), MediaType.TEXT_HTML) 22 23 } $DATA_DIR/scripts/apps/functions/main.groovy
- 11.
- 12. Groovy Geoserver API geoserver Geoserver:Main entry point for Catalog and Config Config: Metadata about GeoServer geoserver.catalog Catalog: Contains Workspaces, Layers, Stores Workspace: Contains Stores Store: Contains Layers, Converts to GeoScript Workspace Layer: Converts to GeoScript Layer
- 13. layer as tableapp 1 import org.restlet.data.* 2 import geoserver.* 3 import groovy.xml.MarkupBuilder 4 5 def run(request, response) { 6 7 def layer = new GeoServer().catalog.getLayer("sf:archsites") 8 def gsLayer = layer.geoScriptLayer 9 10 def out = new StringWriter() 11 def html = new MarkupBuilder(out) 12 html.html { 13 head { 14 title: "Layer Table" 15 } 16 body { 17 h1 "${layer.name}" 18 table(border:1) { 19 tr { 20 gsLayer.schema.fields.each {fld -> 21 td "${fld.name}" 22 } 23 } 24 gsLayer.eachFeature { f -> 25 tr { 26 f.attributes.each { att -> 27 td "${att.value}" 28 } 29 } 30 } 31 } 32 } 33 } 34 response.setEntity(out.toString(), MediaType.TEXT_HTML) 35 } $DATA_DIR/scripts/apps/table/main.groovy
- 14.
- 15. Filter Functions Transform avalue before displaying it Format a date or a number Capitalize a string Manipulate a geometry GeoTools input objects are wrapped as GeoScript objects GeoScript result objects are unwrapped as GeoTools objects
- 16. Filter Function 1 /** 2* Convert a Geometry into a buffered centroid 3 * @param value The Feature 4 * @param args A List of arguments 5 * args[0] is the Geometry 6 * args[1] is the buffer distance 7 */ 8 def run(value, args) { 9 args[0].centroid.buffer(args[1] as double) 10 } $DATA_DIR/scripts/function/bufferCentroid.groovy
- 17. Geometry filter function 1<?xml version="1.0" encoding="ISO-8859-1"?> 2 <StyledLayerDescriptor version="1.0.0" 3 xsi:schemaLocation="http://www.opengis.net/sld StyledLayerDescriptor.xsd" 4 xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc" 5 xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> 6 <NamedLayer> 7 <Name>Buffered Centroid</Name> 8 <UserStyle> 9 <Title>Buffered Centroids Polygons</Title> 10 <Abstract>Draw buffered centroids of polygons</Abstract> 11 <FeatureTypeStyle> 12 <Rule> 13 <Name>Rule 1</Name> 14 <Title>Gray Polygon with Black Outline</Title> 15 <Abstract>A polygon with a gray fill and a 1 pixel black outline</Abstract> 16 <PolygonSymbolizer> 17 <Geometry> 18 <ogc:Function name="bufferCentroid"> 19 <ogc:PropertyName>the_geom</ogc:PropertyName> 20 <ogc:Literal>1</ogc:Literal> 21 </ogc:Function> 22 </Geometry> 23 <Fill> 24 <CssParameter name="fill">#AAAAAA</CssParameter> 25 </Fill> 26 <Stroke> 27 <CssParameter name="stroke">#000000</CssParameter> 28 <CssParameter name="stroke-width">1</CssParameter> 29 </Stroke> 30 </PolygonSymbolizer> 31 </Rule> 32 </FeatureTypeStyle> 33 </UserStyle> 34 </NamedLayer> 35 </StyledLayerDescriptor>
- 18.
- 19. WPS Web Processing Service Modelbuilder for the web Generic web services for spatial data GeoTools inputs are wrapped as GeoScript objects GeoScript results are unwrapped as GeoTools objects
- 20. Geometry Buffer WPS 1import geoscript.geom.Geometry 2 3 title = 'Buffer' 4 description = 'Buffers a geometry' 5 6 inputs = [ 7 geom: [name: 'geom', title: 'The geometry to buffer', type: Geometry.class], 8 distance: [name: 'distance', title: 'The buffer distance', type: Double.class] 9 ] 10 11 outputs = [ 12 result: [name: 'result', title: 'The buffered geometry', type: Geometry.class] 13 ] 14 15 def run(input) { 16 [result: input.geom.buffer(input.distance as double)] 17 } 18 $DATA_DIR/scripts/wps/buffer.groovy
- 21.
- 22. Buffer geometry WPS POLYGON((11 1, 10.807852804032304 -0.9509032201612824, 10.238795325112868 -2.826834323650898, 9.314696123025453 -4.555702330196022, 8.071067811865476 -6.071067811865475, 6.555702330196023 -7.314696123025453, 4.826834323650898 -8.238795325112868, 2.9509032201612833 -8.807852804032304, 1.0000000000000007 -9, -0.9509032201612819 -8.807852804032304, -2.826834323650897 -8.238795325112868, -4.55570233019602 -7.314696123025453, -6.071067811865475 -6.0710678118654755, -7.314696123025453 -4.555702330196022, -8.238795325112868 -2.8268343236508944, -8.807852804032306 -0.9509032201612773, -9 1.0000000000000075, -8.807852804032303 2.950903220161292, -8.238795325112862 4.826834323650909, -7.3146961230254455 6.555702330196034, -6.071067811865463 8.071067811865486, -4.555702330196008 9.314696123025463, -2.826834323650879 10.238795325112875, -0.9509032201612606 10.807852804032308, 1.0000000000000249 11, 2.950903220161309 10.807852804032299, 4.826834323650925 10.238795325112857, 6.555702330196048 9.314696123025435, 8.071067811865499 8.07106781186545, 9.314696123025472 6.555702330195993, 10.238795325112882 4.826834323650862, 10.807852804032311 2.9509032201612437, 11 1)) http://localhost:8080/geoserver/wps?service=WPS &version=1.0.0 &request=Execute &identifier=groovy:buffer &datainputs=geom=POINT%20(1%201) @mimetype=application/wkt;distance=10 &RawDataOutput=result=@mimetype=application/wkt
- 23. Voronoi Layer WPS 1import geoscript.geom.* 2 import geoscript.layer.* 3 4 title = 'VoronoiLayer' 5 description = 'Create a voronoi diagram around the features of a Layer' 6 7 inputs = [ 8 layer: [name: 'layer', title: 'The Layer', type: Layer.class], 9 ] 10 11 outputs = [ 12 result: [name: 'result', title: 'The voronoi diagram as a Layer', type: Layer.class] 13 ] 14 15 def run(input) { 16 def geoms = new GeometryCollection(input.layer.features*.geom.centroid) 17 def output = new Layer() 18 output.add([geoms.voronoiDiagram]) 19 [result: output] 20 } 21 $DATA_DIR/scripts/wps/voronoi.groovy
- 24.
- 25. Rendering transformations Modify anentire dataset Buffer the entire layer not each feature Create a heatmap from points (vector to raster) http://docs.geoserver.org/latest/en/user/ styling/sld-extensions/rendering- transform.html
- 26. Rendering Transform sld 1<?xml version="1.0" encoding="ISO-8859-1"?> 2 <StyledLayerDescriptor version="1.0.0" 3 xsi:schemaLocation="http://www.opengis.net/sld StyledLayerDescriptor.xsd" 4 xmlns="http://www.opengis.net/sld" 5 xmlns:ogc="http://www.opengis.net/ogc" 6 xmlns:xlink="http://www.w3.org/1999/xlink" 7 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> 8 <!-- a Named Layer is the basic building block of an SLD document --> 9 <NamedLayer> 10 <Name>default_polygon</Name> 11 <UserStyle> 12 <!-- Styles can have names, titles and abstracts --> 13 <Title>Default Polygon</Title> 14 <Abstract>A sample style that draws a polygon</Abstract> 15 <!-- FeatureTypeStyles describe how to render different features --> 16 <!-- A FeatureTypeStyle for rendering polygons --> 17 <FeatureTypeStyle> 18 <Transformation> 19 <ogc:Function name="groovy:voronoi"> 20 <ogc:Function name="parameter"> 21 <ogc:Literal>layer</ogc:Literal> 22 </ogc:Function> 23 </ogc:Function> 24 </Transformation> 25 <Rule> 26 <Name>rule1</Name> 27 <Title>Gray Polygon with Black Outline</Title> 28 <Abstract>A polygon with a gray fill and a 1 pixel black outline</Abstract> 29 <PolygonSymbolizer> 30 <Fill> 31 <CssParameter name="fill">#AAAAAA</CssParameter> 32 </Fill> 33 <Stroke> 34 <CssParameter name="stroke">#000000</CssParameter> 35 <CssParameter name="stroke-width">1</CssParameter> 36 </Stroke> 37 </PolygonSymbolizer> 38 </Rule> 39 </FeatureTypeStyle> 40 </UserStyle> 41 </NamedLayer> 42 </StyledLayerDescriptor> 43
- 27.
- 28. Conclusion GeoServer is wellknown as a WMS, WFS, WCS, WPS server GeoServer is also a platform for spatial web services Scripting just finally makes it easy
- 29.