stdm online architecture and services for land administration
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GLTN
Arnulf Christl: metaspatialDanilo Antonio: UN Habitat
John Gitau: UN HabitatArchitecture and Services for Land Administration
CONTENT
The characteristics of Data
The characteristics of Software
The Need for Interoperability and Standards
STDM (The Social Tenure Domain Model)
Architecture
Standards
Software
Positive Impact of Open Source
Conclusions
The Characteristics of Data
Geospatial data is:
Big
Complex
Expensive
Long-lived and persistent
The Characteristics of Software
Software is:
Small
Simple
Flexible and Interoperable
Short-lived and ever changing...
Free of Licensing Costs (Open Source)
Example I.
Satellite Imagery:
2.2 MB MapServer software can serve 7 Petabyte of NASA imagery data
0 000 000 002 MB software7 000 000 000 MB data
When is Software Complex?
When it comes together.
For geospatial projects we typically need:
Operating System
Database
Data Creation and Capture Tools
ETL Tools
Analysis Tools
Services... (and many more)
Example II.
Ordnance Survey GBPostgres & PostGIS
QGIS
GDAL OGR
GeoServer
OpenLayers
etc.
Quality Open Source
Need for Interoperability and Standards
Ordnance Survey Great Britain: ISO/IEC SQL (data management)
OGC SFS (data store)
OGC WMS (map service)
OGC WFS (feature service)
ISO 19115-1:2014 (Metadata)
W3C TCP/IP (Internet Protocol)
W3C HTTP (Hypertext Transfer Protocol)
etc.
Bringing it All Together
Data < Standards > SoftwareFirst look at your data needs
Then look at the processes you wish to perform
Then check out which standards you will need
Then start to test out different software with your data!
Then design an architecture based on the standards
Then add software into the architecture
Make sure that any piece of software can be exchanged at any point in time!
STDM Online Requirements
Use state of the art technology, minimize web traffic, support older hardware and any platform.
Record Household Information
Mapping components
Report Generation
Anonymyized Open Data Server
Snapshot of the current
STDM Online
Architecture
STDM Software and Standards
The system is based on Open Source Software components including (besides others):
Postgres / PostGIS
QGIS MapServer
OpenLayers
GDAL OGR
Open Standards help to keep the infrastructure open, including (besides others)
OGC SFS (Data format)
ISO LADM (Data Content)
OGC WMS (map content
OGC GeoPackage (transport)
Conclusions
The Open Source development model has proven to be the right choice for STDM. Standards help to build a sustainable and open system which is:
Easy to Use
Powerful Functionality
Extendable and Customizable
Transparent and Secure
The data model is open and standardized and is accessible by any other software package.
Want to Know More?
Arnulf Christl: [email protected] | @sevenspatial
Danilo Antonio: UN Habitat
John Gitau: UN Habitat
http://www.stdm.gltn.net/ http://metaspatial.net/ http://osgeo.org/
Land and Poverty Conference 2016
Scaling up Responsible Land Governance
14-18 March, 2016 | Washington, DC
GLTN BRIEFING AND PROGRAMME
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