Voronoi polygon generation using GRASS-GIS (v.voronoi)

Created: 2011-04-27 16:18:17 Last updated: 2011-04-27 16:18:19

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Generic example on how to deal with vectorial data. Major pitfall is the need to process ProcessOutputs using Xpath plugin.

A random point file in GML 2.1.2 is sent to the v.voronoi service and after it is sent to a service that runs v.out.svg generating a SVG image that can be rendered in Taverna (need to set output to SVG image)

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Titles (1)

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Processors (12)

Name	Type	Description
ExecuteProcess_v.voronoi	wsdl	Wsdl http://rsg.pml.ac.uk/wps/vector.wsdl Wsdl Operation ExecuteProcess_v.voronoi
ExecuteProcess_v.voronoi_DataInputs	xmlsplitter
random_points	stringconstant	Value http://rsg.pml.ac.uk/wps/testdata/random_points.gml
Xpath_getResult	xpath	Xpath Expression //[local-name()='outputResult']/
ExecuteProcess_gml2svg	wsdl	Wsdl http://rsg.pml.ac.uk/wps/generic.wsdl Wsdl Operation ExecuteProcess_gml2svg
ExecuteProcess_gml2svg_DataInputs	xmlsplitter
poly	stringconstant	Value poly
XPath_getSVG	xpath	Xpath Expression /ExecuteProcess_gml2svgResponse/outputResult/*
ExecuteProcess_gml2svg_2	wsdl	Wsdl http://rsg.pml.ac.uk/wps/generic.wsdl Wsdl Operation ExecuteProcess_gml2svg
ExecuteProcess_gml2svg_2_DataInputs	xmlsplitter
XPath_getSVG2	xpath	Xpath Expression /ExecuteProcess_gml2svgResponse/outputResult/*
point	stringconstant	Value point

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Outputs (2)

Name	Description
voronoiOutput
originalPoints

Datalinks (13)

Source	Sink
ExecuteProcess_v.voronoi_DataInputs:output	ExecuteProcess_v.voronoi:DataInputs
random_points:value	ExecuteProcess_v.voronoi_DataInputs:input
ExecuteProcess_v.voronoi:ProcessOutputs	Xpath_getResult:xml_text
ExecuteProcess_gml2svg_DataInputs:output	ExecuteProcess_gml2svg:DataInputs
Xpath_getResult:nodelistAsXML	ExecuteProcess_gml2svg_DataInputs:input
poly:value	ExecuteProcess_gml2svg_DataInputs:type
ExecuteProcess_gml2svg:ProcessOutputs	XPath_getSVG:xml_text
ExecuteProcess_gml2svg_2_DataInputs:output	ExecuteProcess_gml2svg_2:DataInputs
random_points:value	ExecuteProcess_gml2svg_2_DataInputs:input
point:value	ExecuteProcess_gml2svg_2_DataInputs:type
ExecuteProcess_gml2svg_2:ProcessOutputs	XPath_getSVG2:xml_text
XPath_getSVG:nodelistAsXML	voronoiOutput
XPath_getSVG2:nodelistAsXML	originalPoints

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Taverna 2

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Jorgejesus

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Jorgejesus

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Information Tags (7)

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gml
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grass
|
netmar
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pywps
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svg
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vector
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voronoi

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1472 viewings

1213 downloads

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Voronoi polygon generation using GRASS-GIS (v.voronoi)

Created by Jorgejesus on Wednesday 27 April 2011 16:18:17 (UTC)

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Voronoi polygon generation using GRASS-GIS (v.voronoi)

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Workflow Components

Wsdl

Wsdl Operation

Value

Xpath Expression

Wsdl

Wsdl Operation

Value

Xpath Expression

Wsdl

Wsdl Operation

Xpath Expression

Value

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Other workflows that use similar services (2)