News about the Open WPS Platform

An introduction to ZOO-Project

ZOO-Project is a Web Processing Service (WPS) implementation written in C and C++. It is an open source platform, released under MIT/X11 Licence, which implements the WPS standards (1.0.0 and 2.0.0) published by the OGC

ZOO-Project provides a developer-friendly framework for creating and chaining WPS compliant Web Services. Its main goal is to provide generic and standard-compliant methods for using existing open source librairies as WPS.

The ZOO-Project Story

ZOO idea at FOSS4G 2008

ZOO 1st talk at FOSS4G 2009

ZOO-Project 1.0 release at FOSS4G 2010

ZOO-Project 1.1 release at FOSS4G 2011

ZOO-Project 1.2 enters OSGeo incubation in 2012

ZOO-Project 1.3 release at FOSS4G 2013

ZOO-Project 1.4 release at FOSS4G 2014

ZOO-Project 1.5 release in July 2015

ZOO-Project 1.6.0 has been released early 2017

ZOO-Project 1.7.0 has been released June 2019

ZOO-Project 1.8.0 has been released December 2020

ZOO-Project 1.9.0 has been released February 2022

ZOO Tribal Council (PSC)

Prénom Nom Organisation Pays
Nicolas BOZON Klokan Technologies GmbH
Gérald FENOY GeoLabs
Jeff McKENNA Gateway Geomatics
Venkatesh RAGHAVAN Osaka City University
Rajat SHINDE IIT Bombay
Angelos TZOTSOS National Technical University of Athens

ZOO Keepers (Comiters)

Prénom Nom Organisation Pays
Nicolas BOZON Klokan Technologies Gmbh
Trevor CLARKE Ball Aerospace
Rémi Créson IRSTea
Luca DELUCCHI Fondazione Edmund Mach
Gérald FENOY GeoLabs
Knut LANDMARK Norwegian Defence Research
Jeff McKENNA Gateway Geomatics
Marco NEGRETTI Politecnico di Milano
Markus NETELER Mundialis
David SAGGIORATO Cleolys
Angelos TZOTSOS National Technical University of Athens

ZOO Supporters

Knowledge Partners

Get involved!

Talk to the ZOO-Tribe

Contribute Code

  • Bug tracking on GitHub
  • Languages support (using transifex)
  • New services
  • New capability

Contribute Docs

  • Enhancements and corrections
  • Translation (Transifex)

Open WPS platform

WPS Server

ZOO-Kernel is a generic processing engine able to manage and chain services

WPS Services

ZOO-Services is a collection of ready to use services based on existing libs.


ZOO-API is a Javascript API for creating and chaining Services on the server-side.

WPS Client

ZOO-Client is a client side JavaScript library for interacting with WPS Services.


ZOO-Kernel implements the WPS 1.0.0 and 2.0.0 specifications of the Open Geospatial Consortium and runs on GNU/Linux, MacOS X and Windows™ platforms.

ZOO-Kernel (version 1.9.0) implements the OGC API - Processes - Part 1: Core

ZOO-Kernel is able to execute Services written in various programming languages: C/C++, Fortran, Java, PHP, Perl, Ruby, Python, C#, JavaScript and R.

ZOO-Kernel is able to interract with GIS engines such as OTB and SAGA-GIS. So no more coding is needed!

Run your existing code through WPS compliant web services.

OGC WebServices Publication

MapServer support: automatic result publication as : WMS/WFS/WCS

Asynchronous request

GetStatus: ongoing status informations.

GetStatus also available as a service for WPS 1.0.0!

ZOO-Kernel HPC Support

This work was supported by public funds received in the framework of GEOSUD, a project (ANR-10-EQPX-20) of the program "Investissements d'Avenir" managed by the French National Research Agency

The schema has been provided by IRD, IRSTEA, Geolabs, Noveltis.

The ZOO-Kernel now supports remote execution of Services!

ZOO-Kernel HPC Support use

OGC API - Processes

WPS is dead long life to WPS!

No need to modify your service code to access them using REST

MapServer 8.0.0 support

Coming soon

During the 2022 OGC OSGeo ASF Code Sprint, we worked on an updated version of the internal MapServer support used for automatic publication of web services based on the result of a service execution.

Integrated developments

Combining IRODS and SLURM to run application within Singularity container as a service and move the process to the data

ZOO-Project and QGIS integration

Google Summer Of Code 2022: Sandeepan Dhoundiyal

libnode: Using in ZOO-Project

Google Summer Of Code 2022: Momtchil Momtchev

For ZOO-Project, libnode enables full Node.js support and compatibility with the huge NPM ecosystem.

Each WPS service can be implemented as either a CJS or ES6 module that can be transparently called from C/C++ with parameters - the calling convention conversion is implemented in zoo_loader using the node-addon-api/libnode primitives.

import proj4 from 'proj4';
import gdal from 'gdal-async';
export function hellonodejs_es6(conf, inputs, outputs) {
    ZOOUpdateStatus(conf, 0);
    outputs["result"]["value"] = "Hello "
        + inputs["S"]["value"]
        + " from the JS World (ES6 mode) !";
    ZOOUpdateStatus(conf, 100);

Microsoft Azure for Open Source

The ZOO-Project got a grant for testing the Microsoft Azure platform.

Thanks to this grant the ZOO-Project has worked on deploying the solution on Kubernetes and will soon publish a documentation on how to setup the ZOO-Project on Microsoft Azure Kubernetes cluster.

Futur developments

  • Integrate the support for OGC API - Features coming with MapServer 8.0.0 version

  • Investigate the current proposed extension for OGC API - Processes:

    • Part 2: Deploy, Replace, Undeploy (in progress)
    • Part 3: Workflow

  • Add support for efficient data access to specific formats such as COG, OGC API - Features...


ZOO-Services is a growing collection of ready to use services built on top of reliable open source libraries such as GDAL, CGAL and more.

A ZOO-Service is a couple gathering a source code to execute and a ZCFG or YAML file which describes the Service and the needed input/output.

Since the 1.7.0 version, the metadata informations of a ZOO-Services can also be stored in a structured PostgreSQL database.

Turn your code into a standard service easily.

 def HelloPy(conf,inputs,outputs):
        outputs["Res"]["value"]="Hello "+inputs["a"]["value"]+" from Python"
        return zoo.SERVICE_SUCCEEDED

Available services

500+ ready to use WPS





OTB 7.0.0

Orfeo Toolbox

SAGA 7.3



What's next ?

GeoTools (new)


GSoC2016 available on github!


ZOO-API is a server side Javascript library designed to simplify the creation and chaining of existing WPS processes.

ZOO.Process server side classes help the developper to create new services by invoking other WPS processes through HTTP.

ZOO-API only support WPS 1.0.0.

Call and chain your WPS Services the simple way.

Example 1/2 (MapMint 1.0)

Example 2/2 (MapMint 1.0)


ZOO-Client is a client-side JavaScript API which provides simple methods for interacting with WPS 1.0.0 and 2.0.0 server from web applications.

It is helpful for sending requests to any WPS compliant server and to parse the output responses using simple JavaScript.

ZOO-Client relies on modern JavaScript libraries and can be seamlessly integrated in new or existing web applications.

ZOO-Client uses logic-less Mustache templates for creating well-formed WPS requests

Example 1/5 (SAGA Demo)

Example 2/5 (OTB Demo)

Example 3/5 (MapMint 2.0 Client)

Example 4/5 (MapMint 2.0)

Example 5/5 (MapMint 2.0 / Manager)

ZOO-Project on Docker

Build, deploy and run ZOO-Project everywhere using Docker Compose!

ZOO-Project has moved:

GitHub Action to build and publish latest ZOO-Project Docker image and, run tests validating requests and responses for both WPS versions.

MS4W: a ZOO-Project package

A spatial thanks to Jeff McKenna for his hard work!


Fast and easy webmapping

GIS in the browser and Web GIS generator

Questions ?

Grazie mille.

Thanks for listening.


Merci de votre attention.