DD ENV 12656:1999

Foreword
Introduction
1. Scope
2. Normative references
3. Definitions
4. Abbreviations
5. Principles for describing the quality of geographic
    information
    5.1 The framework of quality
    5.2 Quality elements
    5.3 Metaquality
6. Requirements for describing the quality of geographic
    information
    6.1 Introduction
    6.2 Lineage
    6.3 Usage
    6.4 Quality parameters
    6.5 Homogeneity
    6.6 Reporting quality
Annex A (normative) Quality parameters
A.1 Positional accuracy
A.2 Semantic accuracy
A.3 Temporal accuracy
A.4 Completeness
A.5 Logical consistency
Annex B (normative) Rules for defining new quality parameters,
quality indicators and quality measures
B.1 Quality parameters
B.2 Definition of quality indicators and quality measures
B.3 Checklist
Annex C (normative) EXPRESS definition of Quality Schema
Annex D (informative) EXPRESS-G representation of the quality
schema
E.1 The quality schema
E.2 An application example

Gives general principles for describing the quality of geographic information and gives a shcema for describing data quality. Provides specific information that is appropriate for the judging of quality of geographic information. Included, are details of the derivation and usage of particular sets of geographic information and the results of measures of quality either relative to similar information or against a pre-established scale.