WPS

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GRASS based OGC Web Processing Service (WPS) standard implementations

Inside GRASS 7

In GRASS7, the WPS process description can be automatically generated with the option '--wps-process-description'. See announcement.

Example: r.grow --wps-process-description

<?xml version="1.0" encoding="UTF-8"?> <wps:ProcessDescriptions xmlns:wps="http://www.opengis.net/wps/1.0.0" xmlns:ows="http://www.opengis.net/ows/1.1" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/wps/1.0.0 

http://schemas.opengis.net/wps/1.0.0/wpsDescribeProcess_response.xsd"
service="WPS" version="1.0.0" xml:lang="en-US">

<ProcessDescription wps:processVersion="1" storeSupported="true" statusSupported="true"> <ows:Identifier>r.grow</ows:Identifier> <ows:Title>Generates a raster map layer with contiguous areas grown by one cell.</ows:Title> <ows:Abstract>Generates a raster map layer with contiguous areas grown by one cell.</ows:Abstract> <ows:Metadata xlink:title="raster" /> <DataInputs> <Input minOccurs="1" maxOccurs="1"> <ows:Identifier>input</ows:Identifier> <ows:Title>Name of input raster map</ows:Title> <ows:Abstract>Name of input raster map</ows:Abstract> <ComplexData maximumMegabytes="2048"> <Default> <Format> <MimeType>image/tiff</MimeType> </Format> </Default> <Supported> <Format> <MimeType>image/tiff</MimeType> </Format> <Format> <MimeType>image/png</MimeType> </Format> <Format> <MimeType>application/grass-raster-ascii</MimeType> </Format> <Format> <MimeType>application/grass-raster-binary</MimeType> </Format> </Supported> </ComplexData> </Input> <Input minOccurs="0" maxOccurs="1"> <ows:Identifier>radius</ows:Identifier> <ows:Title>Radius of buffer in raster cells</ows:Title> <ows:Abstract>Radius of buffer in raster cells</ows:Abstract> <LiteralData> <ows:DataType ows:reference="xs:float">float</ows:DataType> <ows:AnyValue/> <DefaultValue>1.01</DefaultValue> </LiteralData> </Input> <Input minOccurs="0" maxOccurs="1"> <ows:Identifier>metric</ows:Identifier> <ows:Title>Metric</ows:Title> <ows:Abstract>Metric</ows:Abstract> <LiteralData> <ows:DataType ows:reference="xs:string">string</ows:DataType> <ows:AllowedValues> <ows:Value>euclidean</ows:Value> <ows:Value>maximum</ows:Value> <ows:Value>manhattan</ows:Value> </ows:AllowedValues> <DefaultValue>euclidean</DefaultValue> </LiteralData> </Input> <Input minOccurs="0" maxOccurs="1"> <ows:Identifier>old</ows:Identifier> <ows:Title>Value to write for input cells which are non-NULL (-1 => NULL)</ows:Title> <ows:Abstract>Value to write for input cells which are non-NULL (-1 => NULL)</ows:Abstract> <LiteralData> <ows:DataType ows:reference="xs:integer">integer</ows:DataType> <ows:AnyValue/> </LiteralData> </Input> <Input minOccurs="0" maxOccurs="1"> <ows:Identifier>new</ows:Identifier> <ows:Title>Value to write for "grown" cells</ows:Title> <ows:Abstract>Value to write for "grown" cells</ows:Abstract> <LiteralData> <ows:DataType ows:reference="xs:integer">integer</ows:DataType> <ows:AnyValue/> </LiteralData> </Input> <Input minOccurs="0" maxOccurs="1"> <ows:Identifier>-m</ows:Identifier> <ows:Title>radius is in map units rather than cells</ows:Title> <ows:Abstract>radius is in map units rather than cells</ows:Abstract> <LiteralData> <ows:DataType ows:reference="xs:boolean">boolean</ows:DataType> <ows:AllowedValues> <ows:Value>true</ows:Value> <ows:Value>false</ows:Value> </ows:AllowedValues> <DefaultValue>false</DefaultValue> </LiteralData> </Input> </DataInputs> <ProcessOutputs> <Output> <ows:Identifier>output</ows:Identifier> <ows:Title>Name for output raster map</ows:Title> <ows:Abstract>Name for output raster map</ows:Abstract> <ComplexOutput> <Default> <Format> <MimeType>image/tiff</MimeType> </Format> </Default> <Supported> <Format> <MimeType>image/tiff</MimeType> </Format> <Format> <MimeType>image/png</MimeType> </Format> <Format> <MimeType>application/grass-raster-ascii</MimeType> </Format> <Format> <MimeType>application/grass-raster-binary</MimeType> </Format> </Supported> </ComplexOutput> </Output> </ProcessOutputs> </ProcessDescription> </wps:ProcessDescriptions>


Linking to other software

There are currently several WPS implementations which use GRASS as GIS backbone:

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