Geonetwork for Spatial Data

Geonetwork for Spatial Data

Nizam-ud-Din

GIS Manager

Outlines• What is SDI?

• Geonetwork

• Objective

• Main Goal

• Geonetwork Main Features

• Geonetwork Functionality

• Goenetwork Evolution

• Geonetwork Standards

• Geonetwork Integration Example (FAO)

• Why necessary?

1


What is SDI?

“…the technology, policies, standards, and

human resource necessary to acquire, process,

store, distribute, and improve the utilization of

geospatial data.”

2


What is SDI?

“[Spatial Data Infrastructure]

provides a basis for spatial data

discovery, evaluation, and

application for users and providers

within all levels of government, the

commercial sector, the non-profit

sector, academia and by citizens in

general.”

3


Geonetwork

Geonetwork open source is a standard based and

decentralized spatial information management system,

designed to enable access to geo-referenced databases

and cartographic products from a variety of data

providing through descriptive metadata, enhancing the

spatial information exchange and sharing between

organizations and their audience, using capacities and

the power of the internet.

4


Objective5

The main goal of the software is to increase collaboration within

and between organizations for reducing duplication and

enhancing information consistency and quality and to improve

the accessibility of a wide variety of geographic information

along with the associated information, organized and

documented in a standard and consistent way.


Main Goal6


• Provide a common platform and standards to managegeographic data

• Improve accessibility and sharing of a wide variety ofgeographic data at different scale and from multidisciplinarysources

• Increase collaboration between UU and other local/nationalorganizations for collecting data and make them available tothe internet community

Geonetwork Evolution7


• Prototyping by FAO (2000-2001)

• Version 1 by FAO & WFP (released 2003)

• Version 2 by FAO, WFP & UNEP (released 2005)

• Version 2.1 by FAO & UNOCHA (Oct 2007)

• Version 3.0 (2008)

• Version 3.2.0 Presently

Geonetwork Standards

• Geonetwork implements widely accepted standards

• Interoperability

• Using standard web technologies to share data online

• The International Standard for Geographic Metadata - ISO19115

• OpenGIS Consortium standards(dynamic internet map services, catalogue services etc.)

8


ISO/DIS 191159


This new international standard defines the schema required for describing geographic information and services. It provides information about:

• identification;

• extent;

• quality;

• spatial;

• temporal schema;

• spatial reference;

• distribution …of digital geographic data.

Implementing Common Standards10


Standards for:

• Describing data;

• Finding data;

• Combining data

Geonetwork Privileges11


• View;

• Download;

• Edit;

• Delete;

• Administration;

• Dynamic View;

Geonetwork Main Features• Metadata and data publication and distribution

• Instant search on local and distributed geospatial catalogues

• Uploading and downloading of data, documents, PDF’s and any other content

• An interactive web map viewer that combines Web Map services from distributed servers around

the world

• Online editing of metadata with a powerful template system

• Scheduled harvesting and synchronization of metadata between distributed catalogues

• Groups and users management

• Different metadata standards

• Different sharing levels

• Fine grained access control

12


Geonetwork Functionality

• Searching of spatial data & services

• Downloading of data

• Online dynamic viewing through OGC services

• Metadata editor (template, validation)

• Users Management

• Synchronization/catalogue/distributed search

13


Search in Geonetwork node

Search Criteria

• Any (full text index)

• Title, abstract, keywords (advanced search)

• Exact search

• Simple geographic search (bbox)/selection of geographic area

• Selection by relevancy (modified, title, rating etc.)

• Group, Category, Site ….. & could be added

14


15


Geonetwork Interface – Local server

16


Search in Geonetwork node

17


Advanced Search

18


Geographically Area Specific Search

19


Sorted by Relevancy

20


Editing/interactive map/view/downloading functions

21


22


Administrative Rights

23


Metadata & templates

24Manage Directory/Category


25Statistics & Status

26


Statistics & Status

27


Statistics & Status

28


Reports

29


Food & Agriculture Organization (FAO) Interface-Example

30

Different links allow to extract

information from the Geographical

Server or to visualize the

metadata. The same GIS dataset

is used to generate the different

outputs.Metadata describing

the GIS dataset

ESRI shapefile file

KML file

Visualization of

the GIS dataset


Why Necessary?31


• Unique GIS repository for data integrity and maintenance purposes.

• Naming conventions, standardization and harmonization of GIS data

• Metadata provider application must be connected to the unique GIS repository

• Metadata software for describing data and facilitate dissemination

• Software based on international standards for data sharing

• Software accessible to non-developer users and easy to use.

• Applications based on server side for security reason and better performances.

• Extensibility to ease further developments.

• Metadata software for Minimization of duplication and redundancy.

What is Metadata?31


Metadata is data that describes geospatial data.

Metadata tells;owho, what, and when of a geospatial dataset.oWhat a dataset can’t show – data quality, history and availability.

Metadata can answers the following questions;oWhere did it originate?oWhat steps were followed to create it?oWhat attributes does it contain?oHow is the data projected?oWhat geographic area does it cover?oHow do I obtain the data?oEtc.

Why Care?31


It’s is a solution for data management.Metadata protects investment in data.Promotes data sharingHelps in minimize the costs incurred by data loss or by

creating data that already exists.

Geonetwork for Spatial Data

Government & Nonprofit