Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Loading in …3
×
1 of 15

Cepicky charvat pdf_gi2011_pywps_final

0

Share

Download to read offline

GI2011-X-border-SDI/GDI-Symposium, 23..5.2011: Bad Schandau (SAX)
[ 11. Sächsisches GIS-Forum ]
24.5.2011: Decin (CZE)
[ 1. Bohemian#Saxonian GIS-Forum ]

Related Books

Free with a 30 day trial from Scribd

See all

Related Audiobooks

Free with a 30 day trial from Scribd

See all

Cepicky charvat pdf_gi2011_pywps_final

  1. 1. PyWPS Jachym Cepicky, Karel Charvát jachym@bnhelp.cz http://bnhelp.cz charvat@ccss.cz http://ccss.cz Jachym Cepicky PyWPS 1 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  2. 2. PyWPS ● Implementation of OGC Web Processing Service (OGC WPS) on the server-side ● Started 2006 ● Python-based ● Support for GRASS GIS, GDAL, PROJ4, R, ... Jachym Cepicky PyWPS 2 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  3. 3. What is PyWPS not ● PyWPS is no analytical tool or engine. It does not perform any type of geospatial calculation. ● PyWPS is not special XML parser or generator. It does not validate your GMLs against given schemas (yet), it does not build GML from Python objects. ● It is not complicated. Or, it should not be. Jachym Cepicky PyWPS 3 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  4. 4. Shortly about OGC WPS ● Protocol similar to WMS ● GetCapabilities → List of Processes ● DescribeProcesses → Selected proces specification (In- and Outputs) ● Execute → Performs calculation, returns result ● KVP vs XML ● service=WPS&request=GetCapabilities&version=1.0.0 ● <ows:GetCapabilities xmlns:ows="http://www.opengis.net/ows/1.1" xmlns:wps=" http://www.opengis.net/wps/1.0.0" … service="WPS"> <ows:AcceptVersions> <ows:Version>1.0.0</ows:Version> </ows:AcceptVersions> </ows:GetCapabilities> Jachym Cepicky PyWPS 4 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  5. 5. PyWPS Featuers ● Python-based (< 3.0) ● WPS 1.0.0 ● No processes within the distribution → User has to code custom ones ● On-the-fly creation of GRASS temporary Location/Mapset, if the process does require GRASS modules ● Support for Java libraries (Sextant, …) ● WSDL/SOAP interface Jachym Cepicky PyWPS 5 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  6. 6. PyWPS Architecture Processes Jachym Cepicky PyWPS 6 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  7. 7. PyWPS Architecture ● PyWPS is „just“ thin layer (wrapper) between Internet and processing tool ● As processing tool, various popular GIS programs can be used, for example: ● GRASS GIS ● GDAL/OGR ● Proj4 ● Shapely, R, ... ● The process is to be desgined by the „user“ - programator, who will setup PyWPS Jachym Cepicky PyWPS 7 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  8. 8. News from SVN ● Runs with Jython (Java implementation of Python interpreter) → Direct access to Java world (Used in Humboldt project) ● Support for GRASS 7 WPS interface (Sören Gebert) ● WSDL/Soap bindings (Jorge de Jesus) → PyWPS 3.2 ● Orchestrization of processes using Taverna Jachym Cepicky PyWPS 8 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  9. 9. PyWPS 4.0 ideas ● Be Python 3 ready - use Python 2.7 (currently, it should work on Python 2.4+) ● Use lxml for XML parsing AND writing ● Bring assynchronous calls to windows ● In the debug mode, validate input XMLs against schemas. ● Prepare for WPS 2.0 ● More closer integration with GRASS GIS ● License change ● Process concept ● Use XML conofiguration? ● Jython issue (lxml is CPython-based) Jachym Cepicky PyWPS 9 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  10. 10. Links ● Main page http://pywps.wald.intevation.org ● Wiki http://wiki.rsg.pml.ac.uk/pywps/ ● http://opengeospatial.org/standards/wps Jachym Cepicky PyWPS 10 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  11. 11. Supportes ● Help Service – Remote Sensing s.r.o. http://bnhelp.cz ● Netmar project http://netmar.nersc.no/ ● Prezem project http://prezem.cz ● Humboldt project http://esdi-humboldt.eu Jachym Cepicky PyWPS 11 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  12. 12. Examples in the real world http://geo.sazp.sk Jachym Cepicky PyWPS 12 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  13. 13. Examples in the real world http://povoden.kraj-lbc.cz Jachym Cepicky PyWPS 13 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  14. 14. Examples in the real world http://dev.bnhelp.cz/inspire/client Jachym Cepicky PyWPS 14 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium
  15. 15. Projects using PyWPS ● Prezem (precision farming) http://prezem.cz ● Humboldt http://esdi-humboldt.eu ● Netmar http://netmar.nersc.no/ ● … ● PyWPS is used for various INSPIRE-related tasks (e.g. Transformation service) among others at JRC Ispra. Jachym Cepicky PyWPS 15 jachym@bnhelp.cz Help Service – Remote Sensing GI2011-X-border-SDI/GDI Symposium

×