3.4 Catalogue standards
113
ling of a feature and its relationships to other features are explained in the chapter 3,
section 2.2 "Rules for application schema (ISO 19109)". A feature catalogue is compiled of features according to this definition.
A feature catalogue forms a repository for a set of definitions to classify significant real world phenomena to a particular uni verse of discourse. The catalogue provides a means for organising the data that represent these phenomena into categories
in order to ensure the resulting information is as unambiguous, comprehensive, and
useful as possible.
A feature catalogue has many purposes. The most important ones are listed below:
• A standard feature catalogue may be sufficient for many applications thus considerably reducing costs because the creation of a feature catalogue is a timeconsuming effort.
• A feature catalogue should present an application-oriented particular abstraction
of the real world represented in a given dataset and in a form readily understandable and accessible to users ofthe data.
• Often the feature types in different systems have equal or similar names like private houses and private buildings. A feature catalogue may serve to clarify where
the classification differs.
The ISO 19110 provides a template for the organization of feature catalogue information. This template comprises sections for each feature type and the associated
attributive information. A feature catalogue with only one feature is shown below in
table 3.8 as an example.
Table 3.8. Example for a Feature Catalogue with one Feature Type (Bridge)
#
1
2
3
4
5
6
7
8
9
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12
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18
Feature catalogue element
Feature Catalogue
Name:
Scope:
Field of Application:
Version Number:
Version Date:
Definition Source:
Definition Type:
Producer:
Functionallanguage:
Feature Type
Name:
Definition:
Code:
Aliases:
Feature Operation Names:
Feature Attribute Names:
Feature Association Names:
Subtype of:
Example data (Bridge)
Small example feature catalogue
Illustrate principle offeature cataloguing
Help understanding the standard
1.0
2003-02-20
none
not applicable
Authors ofthe book
not applicable
Bridge
Raised structure built to support a road and serving to span
an obstacle like a river
1001
Opening periods
Bridge availability, Bridge category
Feature under the bridge
Roads
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