Difference between revisions of "ToT FOSSGIS 07"

Revision as of 03:45, 2 November 2007

Schedule of the Training of Trainers course on Free and Open Source Software for Geographic Information Systems held on Oct 22-26 in Jakarta, Indonesia.

Introduction

The Training of Trainers for Free and Open Source Geographic Information Systems (ToT FOSSGIS) conveyed all information required to collaborate on a web based spatial information system in support of emergency management in disaster areas to a mixed group of web developers and GIS professionals. The training took place October 22-26 2007 in Jakarta, Indonesia.

IOSN Training of Trainers

Organizers

Funders and Implementing Partners

With Support from

The WhereGroup Germany

The training was organized by InWEnt - International Capacity Building (Germany), the UNDP - International Open Source Network ASEAN+3 Sub-Regional Node, the University of the Philippines Manila-National Telehealth Center with support from the WhereGroup.

ToT FOSSGIS07 training materials in Bahasa

ToT FOSSGIS07 Participants

Setting the scene

The first day focused on setting the scene, let the attendees introduce themselves and formulate the common base to work from and define the goals.

Introduction of the participants

Participants come from the government, university, international organizations and SMEs.
The technical background of the participants was very diverse ranging from the experienced web developer to the GIS specialist
Participants expected to learn about FOSS, GIS and how to disseminate spatial data using the web. To some participants this also was the first contact with the GNU Linux Operating System.

Introduction to FOSS development and licensing models

What is Open Source?
how does it differentiate from closed source or proprietary software?
What is Free Software licensing?

Excursion

The course room was very well equipped with 30 machines (1:1 participant to machine) running Ubuntu Feisty. A local server hosted all required GIS software in the most current available version so that it could be deployed and installed easily, even by completely Linux unexperienced users. This smooth process was impressive even to the trainer.

Introduction to GIS

Desktop GIS software
- Installation of QuantumGIS, gvSIG
Raster data
Vector data
Point, Line, Curve
Operations on GIS data (buffer, intersect, touches, inside, outside)

Introduction to WebGIS

WebGIS, viewing GIS data in the web
Client-server architecture
Network limitations
Spatial Data Infrastructures
Browsing the spatial web

Examples, Links and Geodata

RSS Notification:

http://www.unosat.org/rss/freemaps.asp?n=1

Standards, Communities and the Web

WebGIS is a lot about interoperability. This involves adoption and adherence to standards wherever they make sense and collaboration and communication wherever they fail or are in need of further development. This day looks into both; the standards organisation OGC and the Open Source Community OSGeo and shows web based examples where this cooperation is working well.

Standards in the GIS world, the Open Geospatial Consortium (OGC)

Introduction to the OGC and devlopment of standards
Basic operation of an OGC web service (OGC OWS)
OGC WMS Web Map Service
- Base URL
- GetCapabilities
- GetMap
- GetFeatueInfo
GML Geographic Markup Language
OGC WFS Web Feature Service
- Base URL
- GetCapabilities
- DescribeFeature
- GetFeatue

The Open Source Geospatial Foundation (OSGeo)

Introduction to the Community of Communities
Software overview (web mapping, geospatial libraries, desktop GIS, catalogs)
Communication, Mailing Lists, IRC, Wiki (this)
Governance
Membership
Local Chapters
Education and Curriculum
Access to Public Geodata

Web Mapping

Introduction to OpenLayers
- Roll your own OpenLayers
Introduction to Mapbender
- Installation
- Adding new services
- Creating new interfaces
- Managing users
- Implementing new functionality

Storing Spatial Data and Serving Maps

The first part of the day will introduce some basic file based spatial data formats and then focus on spatial data management using the standard database PostgreSQL and spatial extension PostGIS. The second part of the day will be dedicated to introducing MapServer as an OGC WMS rendering engine accessing the file based data and geometries stored in PostgreSQL PostGIS.

Data management

File formats
- Shape
- TIFF
Spatially extended database
- Introduction to PostgreSQL
- Installation
- Clients (shell, local installation, web installation)
- Introduction to PostGIS
- Importing spatial data
- Querying data
- Execute GIS operations

Data Visualization

Web Map Server
- Introduction to MapServer
- Installation
- Web Server configuration
Recap: OGC WMS Web Map Service
- Creating a MAP file
- Using Shape files
- Using TIFF Raster data
- Using raster catalogs
- Connecting to PostgreSQL/PostGIS

Querying and Operating on Spatial Data - Orchestrating Services

This day will focus on how to make the maps accessible, searchable and queryable using the OGC Web Feature Service standard.

Query for Data

Web Map Server II
- Cascade WMS
- Making maps look good
- Performance tuning
Recap: OGC WFS Web Feature Service
- MapServer as WFS
Using WFS
- To search for places
- To highlight objects
- To select other objects

Operate on Data

GeoServer
- Installation
- Servlet container configuration
- Administrating GeoServer
- Connecting to PostgreSQL/PostGIS
- Configuring the OGC WFS-T (Transactional Web Feature Service)
Orchestrating GeoServer and MapServer with Mapbender

User Management, Security and Other Needful Things

Due to simple information overload this day was not specifically used to focus on how to manage security but to recap everything that was learned in the days before.

User Management

Several access levels were introduced and different accounts used during the source.

Operating System level access. On the machines the standard user was "foss" with the password "gis". It was discussed that a secure password should consist of a combination of several letters and special characters and should not be a name, birthday, or any other existing word.
Proxy authentication to get access to "The Web"
Database level access; postgres, postgres
GIS web service user authentication and authorization using the Mapbender Framework
Mailing List account, Wiki Account, OSGeo site wide account

Securing services

Due to overload this topic was only grazed at the top.

Using encrypted protocols
Use security facades
Authentication
Authorization
Restricting access
Protocols, log Levels and Privacy

Bringing it all back together

Load WMS from MapServer with PostGIS data
Load WFS from GeoServer with PostGIS data (not enough time, see install instructions in the Appendix)
Create Application interface with Mapbender
Link WFS to WMS in Mapbender (not enough time)
Secure the infrastructure (not enough time)

Every day started with open questions and a rehearsal from the previous day.

Trainers Comments

Impressive organization, everything worked just perfect. The training time was to short for the rich selection of topics - or put it the other way round, it was way too much content for five days.

One day should have been spent completely on how to efficiently use a command line interface, read a technical manual and understand basic networking - things that cannot be expected from Windows end users. One day is enough and would make life so much easier for people, especially when they get back to their existing environment and finally understand how things work. The IT background of the GIS specialists was surprisingly thin. The time was good to build a solid foundation and give an overview of the different GIS tools ranging from libraries over Desktop GIS, spatial databases to web services.

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 == Setting the scene ==