Spatial datasets for geographical referencing - Specification for a street gazetteer
Spatial datasets for geographical referencing - Specification for a street gazetteer
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BS 7666-1 specifies the data to be maintained in a gazetteer of streets, consistent with Part 0 of this standard. This enables different users of street information to use the same data with consistency of content, accuracy, currency and format. Different ways of referencing a street are defined so that data can be accessed by street name, description, route number, unique reference number or external cross-reference. This standard also specifies the means of representing the geometry of the street in terms of coordinates. Three ways are allowed for this with successive levels of detail by:
Identifying the end points of a street, and representing the street as a single line segment Breaking the street at its intermediate junctions to create a set of constituent line segments, termed elementary street units Describing the course of each elementary street unit.
This part of BS 7666 is intended for use by those compiling street gazetteers for purposes of highways and streetworks management, property addressing and navigation. Contents include:
Foreword Introduction Scope Normative references Terms and definitions Street gazetteer requirements Gazetteer metadata Street records Elementary street unit records Data quality.
The main changes that have been made to this part of the standard are as follows:
The structure, content and terminology are made consistent with the new general model in Part 0 The addition of a requirement for gazetteer metadata The addition of a facility for recording descriptive identifiers in multiple languages The addition of a facility for classification of streets The removal of the tolerance attribute and the replacement of the spatial locator by a pair of extremity points
Другие стандарты BS