Feature description and demonstration of the 52°North implementation of the OGC Web Processing Service interface 1.0.0 along with plans for future development. Prese

1. The 52°North WPS
Benjamin Pross, Daniel Nüst
Workshop Geoprocessing on the Web, AGILE 2014

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Project Factsheet
Started: January 2006
Last version: July 2013, v3.2.0
2-3 Developers, 7 contributors
Docs: Api, Wiki, Workshops
Open Source (GPLv2): http://github.org/52North/WPS
Ohloh: http://www.ohloh.net/p/n52-wps

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Feature Overview
● Supports all features and operations of WPS
specification version 1.0.0
● Support for several processing backends:
○ GRASS 7
○ Sextante
○ R
○ ArcGIS Server
○ Java
○ Python
○ Matlab (new!), supports streaming
● Java Process/R script upload via Web UI
● Experimental Transactional Profile (WPS-T)
● Store process outputs in Geo-/MapServer
● Streaming of process in-/outputs
○ Academic demonstration, uses QGIS Client, currently a branch

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Java Processing Backend
Fast & easy process creation using Java
annotations
Automatic creation of process description
Automatic (un-)marshalling of
inputs/outputs
Upload via Web Console

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wps-js
GitHub: https://github.com/52North/wps-js
JavaScript WPS Client
Based on OpenLayers API
(Live demo with WPS4R)

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WPS4R
• Semi-automatic creation of WPS
processes out of R-scripts
• User needs to annotate inputs/outputs
• Rserve is used to execute scripts
• Upload via Web Console
Live demo

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Grass 7 process repository
• Grass 7 process repository
– Core modules
– Addons supported
• Uses wps-grass-bridge by Sören
Demo video
Lines of sight algorithm with ArcGIS client
See also
• http://grass.osgeo.org/grass64/manuals/r.los.html
• https://wiki.52north.org/bin/view/Geoprocessing/EDCDevForu
mWorkshop-07-2013#Raster_data_processing

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Features (cont‘d)
• GeoServer upload
– Store process outputs in local/remote
GeoServers
• Matlab connection with streaming
– https://github.com/autermann/matlab-wps
– https://github.com/autermann/streaming-
wps

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USGS Geo Data Portal

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Spacebel WPS
GetStatus and Cancel operations for flexible process handling
DeployData, UndeployData and DescribeData operations for
discovery and handling of auxiliary data (e.g. a landuse layer)
GetAudit for accessing processing execution traces.
Transactional backends (a.k.a. repositories) for Apache ODE as a
process manager for workflows and the JavaSAGA process
manager for Grid processes.
Callback feature for asynchronous status updates (without
polling) about process completion and failure, which enables
efficient workflows, for example if several web services are
chained.

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INTAMAP
• Real-time mapping of environmental
radioactivity
• WPS provides automatic Kriging interpolation

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Upcoming developments
WPS 4.0 ideas and concepts
Practical applications with WPS4R
New Admin interface (GSoC 2013)
Join!
Trello board: https://trello.com/b/BNLdKv1U/new-wps-features
Wiki: https://wiki.52north.org/bin/view/Geoprocessing/StructuresAndProcedures

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Summary
Open source – contributions welcome!
http://52north.org/about/get-involved
Standardized (OGC: BPR, MMÜ)
Stable Java libraries (JTS, geotools, XMLBeans)
Used in productive environments (ESA, USGS)
Manifold processing back-ends

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Try it!
http://live.osgeo.org/
http://live.osgeo.org/en/overview/52nWPS_
overview.html

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More information:
http://52north.org/wps
http://geoprocessing.demo.52north.org