Most people-to-land relationships worldwide are not recognized, identified or documented. Existing land administration systems are incomplete and do not perform. Lack of know-how, short lived projects and proprietary systems lock-in users and governments. Alternatives are needed. The Social Tenure Domain Model Software (STDM) is based on open standards and Open Source Software to avoid these common pitfalls.

1. Land and Poverty Conference 2016
Scaling up Responsible Land Governance
14-18 March, 2016 | Washington, DC
Arnulf Christl: metaspatial
Danilo Antonio: UN Habitat
John Gitau: UN Habitat
Architecture and Services for Land
Administration

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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

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The Characteristics of Data
Geospatial data is:
●
Big
●
Complex
●
Expensive
●
Long-lived and persistent

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The Characteristics of Software
Software is:
●
Small
●
Simple
●
Flexible and Interoperable
●
Short-lived and ever changing...
●
Free of Licensing Costs (Open Source)

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Example I.
Satellite Imagery:
2.2 MB MapServer™ software can serve
7 Petabyte of NASA imagery data
0 000 000 002 MB software
7 000 000 000 MB data

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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)

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Example II.
Ordnance Survey GB
●
Postgres & PostGIS
●
QGIS
●
GDAL OGR
●
GeoServer
●
OpenLayers
●
etc.
Quality Open Source

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Need for Interoperability and Standards
Ordnance Survey Great Britain:
●
ISO/IEC SQL (data management)
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OGC SFS (data store)
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OGC WMS (map service)
●
OGC WFS (feature service)
●
ISO 19115-1:2014 (Metadata)
●
W3C TCP/IP (Internet Protocol)
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W3C HTTP (Hypertext Transfer Protocol)
●
etc.

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Bringing it All Together
Data < Standards > Software
●
First 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!

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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

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Snapshot of
the current
STDM Online
Architecture

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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)

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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.

14. Want to Know More?
Arnulf Christl: Metaspatial
arnulf.christl@metaspatial.net | @sevenspatial
Danilo Antonio: UN Habitat
John Gitau: UN Habitat
http://www.stdm.gltn.net/
http://metaspatial.net/
http://osgeo.org/