The SEDRIS Data Representation Model
APPENDIX A - Classes
Data Quality

Class Name: Data Quality

Superclass - <SEDRIS Abstract Base>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

An instance of this DRM class specifies an ISO 19115-compliant description of the level of quality of the information contained in the aggregating DRM object.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

  1. Description of the level of data quality for the <Feature Representation> instances within a particular thematic layer, such as vegetation.

FAQs

How does the data quality of a DRM object depend on the data quality of the sources used in its creation?

Each of the processing steps that is performed in the creation of a DRM object has some effect on the quality of the result, but the individual impacts of the processing steps are not well understood, let alone the combined impacts.

How does the data quality of a <Transmittal Root> instance, or any other DRM object within a transmittal, depend on the data quality of its components?

The data quality of the whole is certainly no better than the worst of its components.

Constraints

Composed of (two-way)

Component of (two-way)

Inherited Field Elements

This class has no inherited field elements.

Field Elements

SE_Boolean fictional; 2
SE_Data_Quality_Element field_accuracy; 3
SE_Data_Quality_Element logical_consistency; 4
SE_Data_Quality_Element completeness; 5
SE_Data_Quality_Element abs_horiz_pos_accuracy; 6
SE_Data_Quality_Element rel_horiz_pos_accuracy; 7
SE_Data_Quality_Element abs_vert_pos_accuracy; 8
SE_Data_Quality_Element rel_vert_pos_accuracy; 9

Notes

Composed of Notes


Lineage

If provided, the <Lineage> component specifies either information about the events and/or source data used in constructing the environmental data to which a <Data Quality> instance applies or lack of knowledge about lineage.

Fields Notes

fictional

The value of the fictional field is SE_TRUE if any aspect of the data content intentionally deviates from the available source data; that is, it was constructed out of thin air. The fictional field is SE_FALSE otherwise.

field_accuracy

The field_accuracy field specifies a statement of field accuracy.

logical_consistency

The logical_consistency field specifies an optional statement of logical consistency.

completeness

The completeness field specifies an optional statement of completeness.

abs_horiz_pos_accuracy

The abs_horiz_pos_accuracy field specifies an optional statement about absolute horizontal accuracy. If it is desired to specify absolute horizontal accuracy numerically, a <Property Value> instance with meaning field set to EAC_ABSOLUTE_HORIZONTAL_ACCURACY may be attached as a component of the aggregating DRM object.

rel_horiz_pos_accuracy

The rel_horiz_pos_accuracy field specifies an optional statement about relative horizontal accuracy. If it is desired to specify relative horizontal accuracy numerically, a <Property Value> instance with meaning field set to EAC_RELATIVE_HORIZONTAL_ACCURACY may be attached as a component of the aggregating DRM object.

abs_vert_pos_accuracy

The abs_vert_pos_accuracy field specifies an optional statement about absolute vertical accuracy. If it is desired to specify absolute vertical accuracy numerically, a <Property Value> instance with meaning field set to EAC_ABSOLUTE_VERTICAL_ACCURACY may be attached as a component of the aggregating DRM object.

rel_vert_pos_accuracy

The rel_vert_pos_accuracy field specifies an optional statement about relative vertical accuracy. If it is desired to specify relative vertical accuracy numerically, a <Property Value> instance with meaning field set to EAC_RELATIVE_VERTICAL_ACCURACY may be attached as a component of the aggregating DRM object.


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Last updated: July 26, 2006 Copyright © 2006 SEDRIS