The FGDC and Metadata. To maintain an organization's internal investment in geospatial data To...

The FGDC

and Metadata

• To maintain an organization's internal investment in geospatial data

• To provide information about an organization's

data holdings to data catalogues, clearinghouses, and brokerages

• To provide information needed to process and interpret data to be received through

a transfer from an external source.

Major Uses of MetadataSetting the Stage

Availability - information needed to determine the sets of data that exist for a geographic location.

Fitness for use - information needed to determine if a

set of data meets a specific need.

Access - information needed to acquire an identified set of data.

Transfer - information needed to process

and use a set of data.

The Role of Metadata

The information contained in the standard was selectedbased on the four roles that metadata play.

Setting the Stage

Information that identifies the geographic location and characteristics of natural or constructed features and boundaries on

the earth. This information may be derived from, among other things, remote sensing,

mapping, and surveying technologies.

Definitions

Geospatial data

http://www.fgdc.gov/metadata/csdgm/glossary.html

"National Spatial Data Infrastructure" means the technology, policies,

standards, and human resources necessary to acquire, process, store, distribute, and improve utilization of

geospatial data.

Definitions

NSDI

http://www.fgdc.gov/nsdi/nsdi.html

The Federal Geographic Data Committee

A 19 member interagency committee composed of representatives from the Executive Office

of the President, Cabinet-level and independent agencies.

It’s mission is to promote the coordinated use,

sharing, and dissemination of geospatial data on a national basis.

Definitions

FGDC

http://www.fgdc.gov/fgdc/fgdc.html

A distributed network of geospatial data producers, managers,

and users linked electronically.

Definitions

National Geospatial Data Clearinghouse

http://www.fgdc.gov/publications/documents/geninfo/execord.html

The Content Standard for Digital Geospatial Metadata

(CSDGM)

Objective: To provide a common set of terminology and definitions for the

documentation of digital geospatial data.

The standard establishes the names of data elements and compound elements (groups of data elements) to be used for these purposes,

the definitions of these compound elements and data elements, and information about the values

that are to be provided for the data elements.

Definitions

http://www.fgdc.gov/metadata/contstan.html

The Content Standard is organized using numbered chapters called “sections.”

There are 7 main sections and 3 supporting sections.

Each section is organized into series of elements that define the information

content for metadata to document a set of digital geospatial data.

Organization of the Content Standard

Metadata

The Three Supporting Sections

9 Time PeriodInformation

10 Contact

Information

8 Citation

Information

Organization of the Content Standard

4 52 6 731

DataQuality

Information

SpatialData

OrganizationInformation

SpatialReference

Information

Entityand

AttributeInformation

DistributionInformation

MetadataReference

Information

IdentificationInformation

The Seven Main Sections

A production rule specifies the relationship between a

compound element, and data elements and other (lower-level) compound elements.

In the CSDGM Workbook, Version 2.0, the production

rules are expressed graphically.

Graphical Representation of Production Rules

Compound Element

Data Element

Organization of the Content Standard

Section

Interpreting the Graphical Production Rules

Data Element

A data element is a logically primitive item of data.

Data elements are the things that you “fill in.”

The form for the definition of a data element is:

Data element name -- definition.Type: (choice of “integer”, “real”, “text”, “date”, or “time”)Domain: (describes valid values that can be assigned)

An example of the definition of a data element is:

Abstract -- a brief narrative summary of the data set.Type: textDomain: free text

Note: Data element definitions are containedin the text of the Content Standard,

not in the graphical production rules.

Adapting the CSDGM

Extending the Standard

Extended elements are elements outside the Standard, but needed by the data set producer.These elements may be defined by the data set

producer or the user community.

http://www.fgdc.gov/metadata/csdgm/elements.html

The official requirements and rules forUser Defined Extensions are documented in

Appendix D of the FGDC CSDGM.

A profile is a document that describes the application of the Standard to a specific user community

A profile always contains the Standard, plus modifications to the optionality or

repeatability of non- mandatory elements in the Standard. Modifications to the domains of

standard elements can also be made where permitted by the Standard. Profiles may also

contain extended elements.

Adapting the CSDGM

Creating Profiles

http://www.fgdc.gov/metadata/csdgm/profile.html

Biological Data Profile of the CSDGM (Biological Data Working Group)

Metadata Profile for Shoreline Data

(Bathymetric Subcommittee)

CSDGM: Extensions for Remote Sensing Metadata (Standards Working Group)

FGDC Endorsed Profiles or Extensions ofthe CSDGM, version 2.0

http://www.fgdc.gov/metadata/contstan.html

• Content Standard for Digital Geospatial Metadata (CSDGM - version 2.0)

• CSDGM, Part 1: Biological Data Profile

• Spatial Data Transfer Standard (SDTS), Part 5: Raster Profile and Extensions

• SDTS, Part 6: Point Profile

• SDTS Part 7: Computer-Aided Design and Drafting (CADD) Profile

• Cadastral Data Content Standard

• Vegetation Classification Standard

• Soils Geographic Data Standard

• Geospatial Positioning Accuracy Standard,

Part 1 - Reporting Methodology

Part 2 - Geodetic Control Networks

Part 3 - National Standard for Spatial Data Accuracy

• Content Standard for Digital Orthoimagery, Content Standard for Remote Sensing Swath Data

FGDC Endorsed Standards

http://www.fgdc.gov/standards/status/textstatus.html#Final

The FGDC metadata clearinghouse is a decentralized system of Internet

servers you can use to search for available geospatial data.

Discovering Data Through Metadata

Client

FGDCGateway

Servershousingmetadata

The descriptive information that fuels the

FGDC clearinghouse is metadata,

which is collected in a standard format

to facilitate query and consistent

presentation across the multiple

participating sites.

Discovering Data Through Metadata

A Brief Look at the FGDC Clearinghouse

The FGDC has six gateways to its

clearinghouse system, with access to over 250

spatial data servers.

www.fgdc.gov/clearinghouse/clearinghouse.html

Searches can be performed by using the NSDI Search Wizard, or by using a map interface with place names, or by place

names alone.

A Brief Look at the FGDC Clearinghouse

The new NSDI “Smart Select” Search Wizard bins servers by the types of

metadata they house.

A Brief Look at the FGDC Clearinghouse

Searches can be performedusing a map interface that allows the

user to define an area of interest.

An area of interest can be defined bydragging an area of interest box

on the map interface.

A Brief Look at the FGDC Clearinghouse

You can search all the

servers listed, or you can select only those that

interest you.

A Brief Look at the FGDC Clearinghouse

Select individual servers of interest to

your search.

A Brief Look at the FGDC Clearinghouse

Search criteria can be further refined by time period of content

and keywords.

A Brief Look at the FGDC Clearinghouse

The status of each selected node is displayed as the search

is conducted.

A Brief Look at the FGDC Clearinghouse

When the search is complete, the status window lets you know if you

were successful in discovering metadata that matched your

search criteria.

A Brief Look at the FGDC Clearinghouse

Select a server to see what

metadata is

available.

A Brief Look at the FGDC Clearinghouse

Metadata discovered by the

search is

shown by

title.

A Brief Look at the FGDC Clearinghouse

Metadata record returned in HTML format.

Links take you to each of the seven main sections of

the record.

A Brief Look at the FGDC Clearinghouse

A Brief Look at the FGDC Clearinghouse

The Coastal InformationDirectory (CID) at the NOAA Coastal Services

Center is similar to the FGDC gateway interface,

but the CID searches only those spatial data

servers that house metadata of a

coastal nature.

www.csc.noaa.gov/CID/

A Brief Look at the FGDC Clearinghouse

For more information on the clearinghouse system, visit the FGDC Web site (www.fgdc.gov).

Here you can find information on howto establish your own clearinghouse node

using free Isite software.

On-line tutorials provide assistance for setting up and configuring this software.

A Brief Look at the FGDC Clearinghouse

A Quick Look at Section 5

Entity and Attribute Information

Entity

Attributes

A Common, Everyday Example

A Quick Look at Section 5

A Quick Look at Section 5

Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Roads Entity_Type_Definition: Paved and unpaved surfaces used for transportation. Refers to public access roads only. Entity_Type_Definition_Source: South Carolina Department of Transportation Attribute: Attribute_Label: Road_ID Attribute_Definition: Numerical value assigned to each road. Attribute_Definition_Source: South Carolina Dept. of Transportation Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 10000 Attribute_Units_of_Measure: 1

Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Roads Entity_Type_Definition: Paved and unpaved surfaces used for transportation. Refers to public access roads only. Entity_Type_Definition_Source: South Carolina Department of Transportation Attribute: Attribute_Label: Road_ID Attribute_Definition: Numerical value assigned to each road. Attribute_Definition_Source: South Carolina Dept. of Transportation Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 10000 Attribute_Units_of_Measure: 1

Section 5 can be used to describe a wide range of

data set components.

It is perhaps the most underutilized section

of the standard.

Michael MoellerMike.Moeller@noaa.gov

www.csc.noaa.gov/metadata/