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Geology data modelling and data delivery
- Can be expanded to include new data requirements; - Is compatible with GeoSciML, the international geology data model; - Enables digital transfer of geological information using standard web-based exchange languages. 4. Modify and define the GSV geology data dictionaries to improve science quality. 5. Implement the new geology data model, including establishing processes to replace current map making and data management systems. 6. Migrate the current GSV geology databases to the new data structure. 7. Establish procedures and processes to enable flexible and timely access to the data. Description The geoscience data model represents the fundamental design concept through which GSV mapping activities interact. It is a model of geoscience concepts and the relationships between them with special emphasis on concepts related to information presented on geological maps. The database built on the model must account for a variety of users, including mineral, petroleum and extractive industry explorers, land managers, earth science researchers and the general public. As such, the data model underlying this database must be flexible enough to encompass the wide range of earth science information required by these users. The project has established a data model that is compatible with the international standard for exchange of geological information, the GeoScience Mark-up Language (GeoSciML), for Geological Units, Earth Materials (ie rocks), Faults and Contacts. Other international standards, such as the Open Geospatial Consortium (OGC) Observation and Sampling module, will be progressively established in GeoDATA.Vic. This compatibility will allow the sharing of geological information via these evolving web-based interchange formats, independent of our logical and physical implementation. Part of the mapping geologists’ work is to classify geoscience concepts (such as rocks, contacts, etc) to effectively summarise the variety of things that actually occur. The geology data model serves as a framework for this collecting and recording of observations and knowledge about the Earth, and is based on those real-world data entities used by the geologists. These can be divided into three types: spatial data observations (location of geological units, contacts and points), quantitative measurements (bedding and foliation orientation, isotopic age determination, total magnetic intensity) and descriptions (lithology, fossils, soil, contact relationships). Defining vocabularies that describe these concepts improves the quality of data collected and facilitates exchange of information, and is an important component of the project. Although a printed geological map contains a great deal of information, it is theme-based and only includes a subset of the data available. It is these features, in all their complexity, that must be included in a digital geological data model. The attraction of a digital geological database is the possibility of including all information available about an area. This information will need to be available to other applications, such as 3D software, in addition to the map-making applications. The geology database must facilitate the storage, retrieval and analysis of information at whatever levels of detail it is available. Without a sensible and meaningful data model and resultant databases both the data collection and entry (input) and analysis and product generation (output) activities fail to work properly. A well-defined and consistent data structure and vocabulary will make the data easier to use and access. The team have built the databases and some of the modules to manage Geological Units (version 1.2), which are being used for production of the Seamless Victorian Geology project. Designing the Faults and Contacts interfaces is completed and building the interfaces is to commence in late 2008. Products
For further information contact: Alan Willocks Manager, Geoscience Information Ph: (03) 9658 4501 Fax: (03) 9658 4555 Alan.Willocks@dpi.vic.gov.au |
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© The State of Victoria, 1996 - 2008.
This document was published on 17/04/2008.