SUMMARY TABLE OF THE EQUIVALENCES BETWEEN
THE GeM+, FGDC AND CEN

References:
ENV 12657:1998, Geographic Information - Data description - Metadata
 Content Standard for Digital Geospatial Metadata - Federal Geographic Data Committee (FGDC)
 Estŕndard de metadades del Gestor de Metadades de MiraMon (GeM+), Versió 1.0, Setembre 2000.

THE PRE-STANDARD OF THE COMITÉ EUROPÉEN DE NORMALISATION (CEN)

There are two types of metadata: mandatory and optional. The mandatory metadata are indicated by being introduced by the word shall whilst the optional follow the word may.

For a metadata set to conform to this norm it must include the keys defined as mandatory under the following headings:

and, optionally, it can provide information under the following headings:

The CEN also has metadata that are conditionally mandatory, meaning that they are mandatory in certain circumstances, for instance, there may or may not exist information referring to the section to which they belong.

THE FEDERAL GEOGRAPHIC DATA COMMITTE (FGDC) STANDARD

The standard categorizes elements as being mandatory, mandatory-if-applicable, or optional as follows:

The optionality of a section or compound element always takes precedence over the elements that it contains.

THE UNIVERSAL GEOSPATIAL METADATA MANAGER (GeM+) STANDARD

GeM+ is based on the European standard of the CEN, that is, it includes all the mandatory metadata included in the CEN standard and the conditional mandatory metadata are considered to be equivalent to the Mandatory if Applicable elements of the FGDC and are considered as obligatory by GeM+.

GeM+ also conforms to the FGDC document since it incorporates all the data elements declared as Mandatory and Mandatory if Applicable. Where FGDC defines mandatory elements from a list of options, GeM+ includes these options and adapts them to fit the content of GeM+. The GeM+ Help describes these and always writes them in bold italics. Similarly GeM+ includes and adapts the FGDC optional elements and describes them in the GeM+ Help. However these are only shown in italics in this summary table.

GeM+ reflects this normative characterisation as follows:

CEN FGDC GeM+ Legend

Mandatory

Mandatory

Obligatory

Bold

Mandatory

Mandatory if Applicable

Obligatory

Bold

Mandatory

Optional

Obligatory

Bold

Optional

Mandatory

Obligatory

Bold

Optional

Mandatory if Applicable

Obligatory

Bold

Optional

Optional

Optional

Normal text

SUMMARY TABLE OF EQUIVALENCES

GeM+

CEN

FGDC

IDENTIFICATION

DATASET IDENTIFICATION

IDENTIFICATION_INFORMATION

Dataset title

Dataset title

Identification_Information/Citation_Information/
Title

OVERVIEW

DATASET OVERVIEW

SPATIAL DATA ORGANIZATION INFORMATION

Summary

Summary

Identification_Information/Description/Abstract
TECHNICAL ASPECTS  
Columns

-

Spatial_Data_Organization_Information/
Raster_Object_Information/Column_Count

Rows

-

Spatial_Data_Organization_Information/
Raster_Object_Information/Row_Count
N. of cycles

(No equivalence, original to GeM+)
Cycles
(No equivalence, original to GeM+)
Arc source
(No equivalence, original to GeM+)
File type
(No equivalence, original to GeM+)
Object type
(No equivalence, original to GeM+)
Comments
(No equivalence, original to GeM+)

HORIZONTAL REFERENCE SYSTEM

SPATIAL REFERENCE SYSTEM

SPATIAL REFERENCE INFORMATION

Type

Name of the direct positioning system

Horizontal_Coordinate_System_Definition

Description

Identifier of the direct positioning system

Horizontal_Coordinate_System_Definition
Units

-

- Horizontal_Coordinate_System_Definition / Geographic / Geographic_Coordinate_Units

- Horizontal_Coordinate_System_Definition /
Planar / Planar_Coordinate_Information /
Planar_Distance_Units
Resolution in X and in Y -

- Horizontal_Coordinate_System_Definition / Geographic / Longitude_Resolution + Latitude_Resolution

- Horizontal_Coordinate_System_Definition / Planar / Planar_Coordinate_Information / Plane_Coordinate_Encoding_Method / Coordinate_Representation / Abscissa_Resolution + Ordinate_Resolution

Cell size in X and in Y
(No equivalence, original to GeM+)

HORIZONTAL REFERENCE SYSTEM QUALITY

 

EXTENT

EXTENT

SPATIAL DATA ORGANIZATION INFORMATION

Minimum X
Maximum X
Minimum Y
Maximun Y

 PLANAR EXTENT - Bounding quadrangle

IDENTIFICATION_INFORMATION
Spatial_Domain/Bounding_Coordinates/
West_Bounding_Coordinate
East_Bounding_Coordinate
North_Bounding_Coordinate
South_Bounding_Coordinate

THEMATIC INFORMATION

 

ENTITY AND ATTRIBUTE INFORMATION
Field index
(aportación propia)
Field name -

Detailed_Description / Attribute / Attribute_Label
Band
(aportación propia)
Channel
(aportación propia)
Separator
(aportación propia)
Field description - Detailed_Description / Attribute / Attribute_Definition

Data type and compressed file
(No equivalence, original to GeM+)

Treatment of the variable

   Detailed_Description / Attribute / Attribute_Domain_Values

Units of the variable

   Detailed_Description / Attribute / Attribute_Domain_Values / Range_Domain / Attribute_Units_of_Measure

Show units
(No equivalence, original to GeM+)
NODATA present
(No equivalence, original to GeM+)
NODATA Value
(No equivalence, original to GeM+)
NODATA Definition
(No equivalence, original to GeM+)
Band index
(No equivalence, original to GeM+)
Band name -

Detailed_Description / Attribute / Attribute_Label
Minimum value

-

Detailed_Description / Attribute / Attribute_Domain_Values / Range_Domain / Range_Domain_Minimum
Maximum value

-

Detailed_Description / Attribute / Attribute_Domain_Values / Range_Domain / Range_Domain_Maximum
Quality

-

Detailed_Description / Attribute / Attribute_Value_Accuracy_Information

QUALITY

DATASET QUALITY ELEMENTS

DATA QUALITY INFORMATION
LINEAGE - PROCESS Lineage  

Organisation

-

History

Data_Quality_ Information/Lineage/
Process_Step/Process_Description

Purpose

-

Date

-

Data_Quality_ Information/Lineage/
Process_Step/Process_Date

TOLERANCES

 - -

Name

 - -

Value

 - -
QUALITY PARAMETERS    

Parameter

Quality parameters

-

Indicator

  

Data_Quality_ Information/
Attribute_Accuracy/Attribute_Accuracy_Report
 

Data_Quality_ Information/
Logical_Consistency_Report
 

Data_Quality_ Information/
Completeness_Report
 

Data_Quality_Information/
Positional_Accuracy/Horizontal_Positional_Accuracy/
Horizontal_Positional_Accuracy_Report
 

Data_Quality_Information/
Positional_Accuracy/Vertical_Positional_Accuracy/
Vertical_Positional_Accuracy_Report

Measure

  

Data_Quality_Information/
Positional_Accuracy/Horizontal_Positional_Accuracy/
Quantitative_Horizontal_Positional_Accuracy_Assessment/
Horizontal_Positional_Accuracy_Explanation
 

Data_Quality_Information/
Positional_Accuracy/Vertical_Positional_Accuracy/
Quantitative_Vertical_Positional_Accuracy_Assessment/
Vertical_Positional_Accuracy_Explanation

Type of values

  

-

Measurement value

  

Data_Quality_Information/
Positional_Accuracy/Horizontal_Positional_Accuracy/
Quantitative_Horizontal_Positional_Accuracy_Assessment/
Horizontal_Positional_Accuracy_Value
 

Data_Quality_Information/
Positional_Accuracy/Vertical_Positional_Accuracy/
Quantitative_Vertical_Positional_Accuracy_Assessment/
Vertical_Positional_Accuracy_Value

Measurement units

  

-
METADATA INFORMATION - -

Metadata version
 Relations table version

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