The active faults database of NZ : data dictionary

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Jongens, R.; Dellow, G.D. 2003 The active faults database of NZ : data dictionary . Lower Hutt: Institute of Geological & Nuclear Sciences. Institute of Geological & Nuclear Sciences science report 2003/17 1. v

Abstract: The Active Faults Database of NZ has been developed to manage data about active fault related features. The data comes in two spatial forms: as lines which represents the active fault trace, sections, and overall faults, and as points which represent features such as trenches or displaced terraces. Associated with the spatial data are attributes, in numeric or character form, that give information about the points or lines. This purpose of this data dictionary is to define the attributes for point and line features and explain the “how to fill out” and “what is required?” for each attribute. The attributes are the result of integrating existing Geographic Information System (GIS) active fault attributes (e.g. QMAP) with those deemed important by the active faults database design team. The data dictionary has been designed to help the paleoseismologist record as much field-related data as possible for active faults. Field related data that can be entered includes locality, geomorphological setting, accuracy and expression of the fault trace, sense of movement, age of fault movement, maximum displacement (vertical-, strike-, dip- and net-slip), time interval of maximum displacement, number of events, single event displacement, recurrence interval, last event, author, source, and confidentiality information. Extended definitions for important attributes such as “Fault”, “Section”, “Accurracy”, and “Expression” is given. The Active Faults database design is explained in terms of automatic calculations, fault hierarchy, aggregations, and quality assurance. In addition, techniques for entering data are described. Full summary tables of point and trace attributes, automatic calculations, and aggregations methods are given as appendices. Redundant fault trace attributes from previous databases are also documented. This data dictionary is not definitive. The Active Faults Database of NZ has yet to be used in a working environment; amendments and additions to attributes and their definitions are anticipated. In addition, automatic calculation and aggregation methodology will be reviewed after a period of use. (auth)