national data registry role, scope, structure 09, 2017 · national data registry role, scope,...

National Data Registry role, scope, structure

N. L. Sarda

IIT Bombay

Outline

• Registry for facilitating data usage

• Scope and role for NDR

• Using standards

• Some case studies

• Approach

1st step in sharing

Have data to share

What is it ? Is it useful to anyone ?

Metadata - Category - which area (loc, BB) - CRS - time, accuracy, resolution, CRS, … - format (standards ?) - usage terms … - content

? Where do we find this metadata

Spatial data infrastructure

Have data to share

Metadata registry

Application schema

Ontology

Registry/Repository/Catalog

with API

My application

Publish

Discover

Access data

As a service

processed data Vs raw data

A federated service

Metadata registry

Application schema

Ontology

Registry

My application

Discover

register

harvest

bind

get/update data

National GIS = NDR + Sources

with API

Essence of standards

• Precise, unambiguous • Widely accepted • Consumable by people AND applications

– Real inter-operability

• Extendible • Query-able • Proven – create use cases, prototype

implementations

• OGC : for exchange of data/metadata, for spatial, for services, for domains

Metadata standard

• Provides for the cataloguing of all types of resources, giving full description of datasets and services

• Covers geographic services, geographic datasets, individual geographic features and feature properties

• ISO 19115 package provides for : Citation, Quality, Features, Lineage, Services, Temporal, Reference System, Extent, ….

To support powerful search across domains

• Using both spatial and thematic attributes

“get locations/areas where soil acidity levels have increased by more than 10% yearly for 5 years and where there are chemical industries nearby”

9 February 9, 2017

Registry structure : like a library

WRS

ebRIM Registry

Internal XML

Repository

External Image or

Data Set Repository WRS

Client

Internally

Managed

1:1

relationship

Unmanaged

relationship Like a

card

catalogue

Like the books

in the stacks

Like books in

another library

CSW-ebRIM Interfaces

February 9, 2017 Powering the Geo-Web 10

Application schema

• Domain metadata

• Cover thematic, spatial and temporal attributes

• Cover permitted values, relationships

• Essential part of metadata registry

Soil : example

• How to Store data about soil in a country

• The Data within the schema should follow a standard – Increases interoperability

• INSPIRE has done it based on a Standard called WRB (World Reference Base for Soil Resources )

Soil Core data types

Standardizng codes and attribute values

Domain schemas : for each data providing agency

INSPIRE, OGC domain groups, ISO, BIS standards

Provide API to use your data

Examples of where we want to reach !

INSPIRE portal Dutch data registry ….

Themes

Service Registry Portals

(Dutch) Data Registry

Tools for Organizing metadata

• Powerful search geospatial catalogues

• Uploading and downloading of data

• An interactive Web map viewer that combines Web Map Services from servers around the world

• Online editing of metadata

• Scheduled harvesting and synchronization of metadata (including services metadata)

• Fine grained access control

Main features of metadata tools

Our NDR Approach

• Create effective use cases

• Work with a few data agencies to make their metadata, data and services available

– Gateway node

– Application schema as well as services

• Build NDR platform – repository (WCS)

• Provide search facility

• Showcase use cases through NDR

Conclusions

• NDR

– Will be Source for discovering data

– Will be Foundation for geospatial infrastructure

– Will use standards

– Will Cover data, services

• Identify providers, consumers

• Discipline to keep data updated

• Get ready to join NDR !

Thank you