Concepts related to Metadata and Catalogs¶

Resource¶

• A thing

• Anything which is worth uniquely identifying (over the Web)

• Can be data

Metadata¶

• Data about a resource

• Data about data

Metadata¶

What is Missing ?¶

What is Missing ?¶

Metadata - Who¶

• Who collected the data?

• Who processed the data?

• Who wrote the metadata?

• Who to contact for questions?

• Who to contact to order?

• Who owns the data?

Metadata - What¶

• What are the data about?

• What project were they collected under?

• What are the constraints on their use?

• What is the quality?

• What are appropriate uses?

• What parameters were measured?

• What format are the data in?

Metadata - Why¶

• Why were the data collected?

Where¶

• Where were the data collected?

• Where were the data processed?

• Where are the data located?

When¶

• When were the data collected?

• When were the data processed?

How¶

• How were the data collected?

• How were the data processed?

• How do I access the data?

• How do I order the data?

• How much do the data cost?

• How was the quality assessed?

Metadata requires update¶

Metadata Value¶

• Organizations: captures the knowhow of an organization

• Developers: help share reliable information

• Users: helps discover data

Search¶

Discovery & evaluation of resources through (summary) metadata

Catalog¶

• Organized, detailed, descriptive list of items

• arranged systematically (so they can be found)

Catalog¶

Catalog Service¶

Registry¶

System for maintaining a register or authoritative list of names / values / types / relationships (so they can be referenced)

Repository or Archive¶

Place for storage of resources (so they can be retrieved)

Trader¶

• Intermediary in a service oriented architecture

• Connects providers with consumers)

Discovery using SOA¶

Example: Geospatial Platform¶

Metadata for Hurricane Map¶

Metadata for Hurricane Map¶

FGDC¶

ISO 19115 Geographic Information¶

ISO 19115 Geographic Information¶

Profiles¶